Osisko Releases Resource Estimate For Osborne-Bell

(Toronto, March 15, 2018). Osisko Mining Inc. (OSK:TSX, “Osisko” or the “Corporation”) is pleased to provide a mineral resource estimate for its 100% owned Osborne-Bell gold deposit, located 15 kilometres northwest of the town of Lebel-sur-Quévillon, Québec. This estimate is the result of 927 drill holes (279,925 metres) completed by previous operators on the project since 1994, including 50 that were completed after their last resource estimate was published in 2012, and 4 new drill holes completed by Osisko in December 2017.

The mineral resource estimate has been prepared by Innov-Explo from Val-d’Or, Québec and the technical report, to be prepared and filed in accordance with National Instrument 43-101– Standards of Disclosure for Mineral Projects (“NI-43-101”) will be available on SEDAR (www.sedar.com) under the Corporation’s profile within 45 days.

Highlights

  • Inferred resource of 2,587,000 tons at 6.13 g/t Au for 510,000 ounces of gold assuming US$1,300 per ounce gold price and a lower cut-off grade of 3.0 g/t Au
  • Ongoing 50,000 metre 2018 exploration drill program, including definition/expansion drilling at Osborne-Bell
  • Osborne-Bell deposit remains open at depth below 500 meters

John Burzynski, President and Chief Executive Officer commented, “We are very pleased with our initial resource estimate on Osborne-Bell, a project we acquired for approximately $1.5 million less than a year ago. We had made no assumptions regarding resources during the bankruptcy acquisition of the deposit and surrounding properties in 2017; this first estimate points to a potentially significant deposit that is located very close to the possible site for a planned future Windfall-Lynx gold mill in Lebel-sur-Quévillon. By virtue of its proximity to the proposed Lebel-sur-Quévillon mill site, mining of Osborne-Bell could be realized with essentially immaterial capital expenditures, assuming material can be transported directly to the nearby proposed mill site. We are continuing our 50,000 metre drill program at Osborne-Bell and the surrounding Quévillon area in order to expand the deposit, which remains open at depth, and focus on upgrading inferred resources to M&I categories. This is an excellent start to our year of building a resource base in the Urban-Barry – Quévillon camp. We are also on track for the eagerly awaited Windfall-Lynx resource update coming in May 2018.”

The total inferred mineral resource for the Osborne-Bell deposit has been estimated at 2,587,000 tonnes with an average grade of 6.13 g/t Au for 510,000 ounces of gold, using a 3.0 g/t lower cut-off grade (See Table 1: Osborne-Bell Inferred Mineral Resources below). The model for the resource estimate includes nine (9) individual, sub-vertical and tabular mineralized zones that were defined using a two-metre minimum true thickness. All mineral resources were classified as inferred mineral resources. Additional drilling and historical data validation through core re-assaying are underway to potentially upgrade portions of the resource to measured mineral resource and indicated mineral resource categories.

 

Table 1: Osborne-Bell Inferred Mineral Resources

Cut-off Grade Tonnes (t)(1) Grade (g/t) Oz Au(2)
> 6.00 g/t 883,000 9.77 277,000
> 5.00 g/t 1,273,000 8.44 346,000
> 4.00 g/t 1,816,000 7.26 424,000
> 3.50 g/t 2,156,000 6.70 465,000
> 3.00 g/t 2,587,000 6.13 510,000
> 2.50 g/t 3,166,000 5.51 560,000

Notes:

(1) Rounded to nearest thousand which may cause apparent discrepancies.

(2) Rounded to nearest thousand which may cause apparent discrepancies.

This mineral resource estimate reflects geological re-modeling of the Osborne-Bell deposit, the re-evaluation of historical drilling results from previous operators and the addition of new information from drilling comprising 50 drill holes performed after the 2012 mineral resource estimate released by the previous owner (see the “43-101 Technical Report and Mineral Resource Estimate – Osbell Deposit, Comtois Property”, dated effective October 26, 2012, and filed on SEDAR on December 7, 2012, under the issuer profile of Maudore Minerals Ltd, at www.sedar.com) and four new Osisko verification drill holes completed in December 2017. The model focuses on definition of higher-grade sub domains as compared to the broad mineralized domain approach of earlier estimates. This estimate only considers mineralized zones potentially minable by underground methods at a lower cut-off grade of 3.0 g/t Au. The cut-off calculation is based on assumptions of (a) a mining cost of C$80/t mined, (b) a processing and transportation cost of C$58/t milled, (c) a G&A cost of C$10/t milled, (d) a gold price of US$1,300/oz and (e) an exchange rate of USD:CAD of 1.29. Other parameters are described in Table 2: Parameters used for Resource Estimation, below. The effective date of the current resource estimation is March 2, 2018.

Table 2: Parameters used for Resource Estimation

Parameters Unit Value
Gold Price US$/oz 1,300
Exchange Rate US$/C$ 1.29
Mill Recovery % 93
Selling Cost C$/oz 5
Mining Cost C$/t mined 80
G&A Cost C$/t milled 10
Processing Cost C$/t milled 40
Transport C$/t milled 18
Calculated Cut-Off Grade Au g/t 2.96

 

Further details regarding the curent mineral resource estimate, including the key assumptions, parameters and methods used to prepare the mineral resource estimate of the Osborne-Bell gold deposit will be available on SEDAR (www.sedar.com) under the Corporation’s profile within 45 days. For further details about the 2012 resource estimate, please see the ” 43-101 Technical Report and Mineral Resource Estimate – Osbell Deposit, Comtois Property, dated effective October 26, 2012, and filed on SEDAR on December 7, 2012, under the issuer profile of Maudore Minerals Ltd at www.sedar.com.

Mineral Resource Estimate Notes:

  1. Resources are presented undiluted and in situ and are considered to have reasonable prospects for economic extraction.
  2. The estimate encompasses nine tabular gold-bearing zones each defined by individual wireframes with a minimum true thickness of 2 metres.
  3. High grade capping was done on composite data and established on a per zone basis for gold. It varies from 25 g/t Au to 55 g/t Au.
  4. Density values were applied on the following lithological basis (g/cm3): volcanic host rocks = 2.80; late barren dykes and Beehler stock = 2.78; Zebra felsic unit = 2.72.
  5. Grade model mineral resource estimation was evaluated from drill hole data using an Ordinary Kriging interpolation method on a block model using a block size of 2.5 metres x 2.5 metres x 2.5 metres.
  6. The mineral resource estimate presented herein is categorized as inferred mineral resource. The inferred mineral resource category is only defined within the areas where drill spacing is less than 100 metres and shows reasonable geological and grade continuity.
  7. The mineral resource estimate was prepared using Geovia GEMS 6.8. The estimate is based on 931 surface diamond drill holes. A minimum true thickness of 2.0 metres was applied, using the grade of the adjacent material when assayed, or a value of zero when not assayed.
  8. Estimates use metric units (metres, tonnes and g/t). Metal contents are presented in troy ounces (metric tonne x grade / 31.10348).
  9. The number of metric tonnes was rounded to the nearest thousand. Any discrepancies in the totals are due to rounding errors.
  10. InnovExplo is not aware of any known environmental, permitting, legal, title-related, taxation, socio-political or marketing issues, or any other relevant issue not reported in the technical report, that could materially affect the mineral resource estimate.
  11. These mineral resources are not mineral reserves as they do not have demonstrated economic viability. The quantity and grade of reported Inferred resources in this Mineral Resource Estimate are uncertain in nature and there has been insufficient exploration to define these Inferred resources as Indicated or Measured, and it is uncertain if further exploration will result in upgrading them to these categories.

Qualified Person

This mineral resource estimate was prepared by Pierre-Luc Richard, P.Geo., M.Sc., who is a “qualified person” within the meaning of NI 43-101. Mr. Richard is an employee of Innov-Explo and is considered to be independent of Osisko for purposes of section 1.5 of NI 43-101. The effective date of the mineral resource estimate is March 2, 2018.

The scientific and technical information contained in this news release has been reviewed and approved by Mr. Mathieu Savard, P.Geo., who is a “qualified person” within the meaning of NI 43-101, and serves as the Vice President Exploration Québec of Osisko.

Quality Control

For the sample processed by Osisko during late 2017 campaign and included in this resource estimation, all NQ core assays reported were obtained by either 1-kilogram screen fire assay or standard 50-gram fire-assaying-AA finish or gravimetric finish at ALS Laboratories in Val d’Or, Québec, Thunder Bay and Sudbury, Ontario or Vancouver, British Colombia or Bureau Veritas in Timmins, Ontario. The 1-kilogram screen assay method is selected by the geologist when samples contain coarse gold or present a higher percentage of pyrite than surrounding intervals. Selected samples are also analyzed for multi-elements, including silver, using an Aqua Regia-ICP-AES method at ALS Laboratories. Drill program design, Quality Assurance/Quality Control (“QA/QC”) and interpretation of results is performed by qualified persons employing a QA/QC program consistent with NI 43-101 and industry best practices. Standards and blanks are included with every 20 samples for QA/QC purposes by the Corporation as well as the lab. Approximately 5% of sample pulps are sent to secondary laboratories for check assay.

About Osisko Mining Inc.

Osisko is a mineral exploration company focused on the acquisition, exploration, and development of precious metal resource properties in Canada. Osisko holds a 100% in the high-grade Windfall Lake gold deposit located between Val-d’Or and Chibougamau in Québec and holds a 100% undivided interest in a large area of claims in the surrounding Urban Barry area and nearby Quevillon area (over 3,300 square kilometres), a 100% interest in the Marban project located in the heart of Québec’s prolific Abitibi gold mining district, and properties in the Larder Lake Mining Division in northeast Ontario, including the Jonpol and Garrcon deposits on the Garrison property, the Buffonta past producing mine and the Gold Pike mine property. The Corporation also holds interests and options in a number of additional properties in northern Quebec and Ontario. Osisko continues to be well financed with approximately $190 million in cash and investments as of the end of Q4, 2017.

Cautionary Statements Regarding Estimates of Mineral Resources

This news release uses the terms measured mineral resource, indicated mineral resource and inferred mineral resource as a relative measure of the level of confidence in the mineral resource estimate. Readers are cautioned that mineral resources are not economic mineral reserves and that the economic viability of resources that are not mineral reserves has not been demonstrated. The estimate of mineral resources may be materially affected by environmental, permitting, legal, title, socio-political, marketing or other relevant issues. It cannot be assumed that all or any part of an inferred mineral resource will ever be upgraded to indicated mineral resource or measured mineral resource categories. The mineral resource estimate is classified in accordance with the Canadian Institute of Mining, Metallurgy and Petroleum’s “CIM Definition Standards- For Mineral Resources and Mineral Reserves” incorporated by reference into NI 43-101. Under Canadian rules, estimates of inferred mineral resources may not form the basis of feasibility or pre-feasibility studies or economic studies except for a “preliminary economic assessment” as defined under NI 43-101. Readers are cautioned not to assume that further work on the stated mineral resources will lead to mineral reserves that can be mined economically.

  • Cautionary Note Regarding Forward-Looking Information

This news release contains “forward-looking information” within the meaning of the applicable Canadian securities legislation that is based on expectations, estimates, projections and interpretations as at the date of this news release. Any statement that involves discussions with respect to predictions, expectations, interpretations, beliefs, plans, projections, objectives, assumptions, future events or performance (often but not always using phrases such as “expects”, or “does not expect”, “is expected”, “interpreted”, “management’s view”, “anticipates” or “does not anticipate”, “plans”, “budget”, “scheduled”, “forecasts”, “estimates”, “believes” or “intends” or variations of such words and phrases or stating that certain actions, events or results “may” or “could”, “would”, “might” or “will” be taken to occur or be achieved) are not statements of historical fact and may be forward-looking information and are intended to identify forward-looking information. This news release contains the forward-looking information pertaining to, among other things, the timing and ability of Osisko to file a technical report in respect of this resource estimate; the prospects of the Osborne-Bell gold deposit; the potential for the Osborne-Bell gold deposit being a significant deposit; the potential future mill site for the Windfall Lake gold deposit; the timing and ability of Osisko, if at all, to publish a resource update for Windfall-Lynx; the projected capital expenditures of mining activities at the Osborne-Bell gold deposit; upgrading a inferred mineral resource to a measured mineral resource or indicated mineral resource category; the significance of historic exploration activities and results. This forward-looking information is based on reasonable assumptions and estimates of management of the Corporation, at the time it was made, involves known and unknown risks, uncertainties and other factors which may cause the actual results, performance or achievements of Osisko to be materially different from any future results, performance or achievements expressed or implied by such forward-looking information. Such factors include, among others, risks relating to the ability of exploration activities (including drill results) to accurately predict mineralization; errors in management’s geological modelling; the ability of Osisko to complete further exploration activities, including drilling; property interests in the Quevillon project and the Osborne-Bell Gold Deposit; the ability of the Corporation to obtain required approvals; the results of exploration activities; risks relating to mining activities; the global economic climate; metal prices; dilution; environmental risks; and community and non-governmental actions. Although the forward-looking information contained in this news release is based upon what management believes, or believed at the time, to be reasonable assumptions, Osisko cannot assure shareholders and prospective purchasers of securities of the Corporation that actual results will be consistent with such forward-looking information, as there may be other factors that cause results not to be as anticipated, estimated or intended, and neither Osisko nor any other person assumes responsibility for the accuracy and completeness of any such forward-looking information. Osisko does not undertake, and assumes no obligation, to update or revise any such forward-looking statements or forward-looking information contained herein to reflect new events or circumstances, except as may be required by law.

CONTACT INFORMATION:

John Burzynski
President & Chief Executive Officer
(416) 363-8653

Osisko Intersects 265 g/t Au Over 2.4 Metres At Windfall

High-Grade Infill Hits in Underdog, Caribou, Caribou Extension, Bobcat and Mallard

(Toronto, March 2, 2018)  Osisko Mining Inc. (OSK:TSX. “Osisko” or the “Corporation”) is pleased to provide new results from the ongoing drill program at its 100% owned Windfall Lake gold project located in the Abitibi greenstone belt, Urban Township, Eeyou Istchee James Bay, Québec. The 800,000 metre drill program combines definition, expansion and exploration drilling in and around the main Windfall gold deposit and the adjacent Lynx deposit (located immediately NE of Windfall).

Significant new analytical results from 61 intercepts in 34 drill holes and 5 wedges focused on infill and expansion drilling in the Main Windfall lake deposit are presented below.

Highlights from the new results include: 265 g/t Au over 2.4 metres in OSK-W-17-1168; 191 g/t Au over 2.6 metres in OSK-W-17-1087; 198 g/t Au over 2.3 metres and 116 g/t Au over 2.1 metres in OSK-EAG-12-333; 173 g/t Au over 2.3 metres in OSK-W-17-1383; 47.7 g/t Au over 2.2 metres in OSK-W-17-1402, 42.7 g/t Au over 2.0 metres in OSK-W-17-1391 and 9.53 g/t over 8.9 metres in OSK-W-18-823-W2. Maps showing hole locations and full analytical results are available at www.osiskomining.com.

Hole Number From (m) To
(m)
Interval (m) Au (g/t) uncut Au (g/t)
cut to
100 g/t
Zone Corridor
OSK-EAG-12-333 818.2 823.0 4.8 3.07 FW3 Underdog
including 822.7 823.0 0.3 23.1
848.1 850.2 2.1 116 59.4 FW3 Underdog
including 849.2 850.2 1.0 219 100
934.0 936.3 2.3 198 21.8 FW3U Underdog
including 935.2 935.7 0.5 910 100
OSK-EAG-12-427 1110.0 1112.2 2.2 4.29 VNCR Underdog
OSK-EAG-13-480 522.3 524.3 2.0 37.1 20.6 Vein
including 524.0 524.3 0.3 210 100
692.0 694.0 2.0 6.68 FW1 FW Underdog
including 692.0 693.0 1.0 12.4
OSK-W-16-762 1158.0 1160.5 2.5 6.59 FW3 Underdog
including 1158.0 1158.8 0.8 17.8
OSK-W-17-795 1110.3 1113.7 3.4 5.53 FW1 Underdog
including 1110.3 1110.9 0.6 23.1
OSK-W-17-866-W2 933.3 935.5 2.2 4.92 FW0 Underdog
1221.0 1223.0 2.0 7.59 FW3 Underdog
including 1221.7 1222.3 0.6 23.7
OSK-W-17-901 675.5 678.0 2.5 8.27 FW3U Underdog
including 676.6 676.9 0.3 65.9
OSK-W-17-903-W2 556.0 560.9 4.9 3.72 Z27 Zone 27
including 556.0 557.1 1.1 8.88
including 560.0 560.9 0.9 8.94
593.0 595.0 2.0 8.52 Z27 FW Zone 27
including 593.0 594.0 1.0 16.7
OSK-W-17-937-W1 756.2 758.6 2.4 26.6 Wolf 2 Wolf
including 757.0 758.6 1.6 39.0
OSK-W-17-943 491.0 493.0 2.0 3.00 CS1 Caribou
including 492.0 493.0 1.0 5.57
614.0 616.0 2.0 4.51 Wolf HW Wolf
688.0 690.0 2.0 4.96 Wolf Wolf
including 688.0 689.0 1.0 9.64
OSK-W-17-1025 690.0 692.3 2.3 3.13 FW0 Underdog
OSK-W-17-1051 954.0 956.4 2.4 7.60 FW3 Underdog
OSK-W-17-1087 354.0 356.6 2.6 191 19.6 Mallard Mallard
including 354.0 354.5 0.5 991 100
OSK-W-17-1168 503.6 506.0 2.4 265 13.3 VNCR Caribou
including 504.3 504.6 0.3 2110 100
OSK-W-17-1221 771.0 773.0 2.0 4.61 Vein Wolf
including 771.0 771.8 0.8 11.5
OSK-W-17-1226 662.0 664.0 2.0 11.5 Caribou Ext. Caribou
including 662.6 663.5 0.9 24.4
673.0 675.0 2.0 10.4 Caribou Ext. Caribou
including 673.0 674.0 1.0 20.3
823.8 826.0 2.2 6.57 Caribou Ext. Caribou
including 823.8 825.0 1.2 12.0
OSK-W-17-1232 331.0 333.0 2.0 4.70 Vein Caribou
OSK-W-17-1275 553.1 556.1 3.0 4.49 Z27 Zone 27
including 554.1 555.0 0.9 11.5
OSK-W-17-1293 802.7 805.0 2.3 6.54 Vein
including 803.7 804.0 0.3 49.7
OSK-W-17-1295 387.0 389.0 2.0 3.36 FW3 Underdog
OSK-W-17-1310 54.0 57.0 3.0 3.61 Caribou Caribou
354.0 357.0 3.0 3.37 Vein Mallard
OSK-W-17-1319 162.0 165.0 3.0 5.80 Z27 Zone 27
including 162.0 163.5 1.5 11.4
OSK-W-17-1320 557.5 560.8 3.3 3.46 Caribou Ext. Caribou
OSK-W-17-1334 86.0 88.0 2.0 4.05 Bobcat Bobcat
OSK-W-17-1336 277.4 279.5 2.1 4.16 Vein
810.0 813.0 3.0 17.0 FW0 Underdog
972.0 974.0 2.0 4.10 FW2 Underdog
OSK-W-17-1337 19.0 21.5 2.5 3.39 Mallard Mallard
including 20.0 20.4 0.4 13.7
OSK-W-17-1342 211.9 214.0 2.1 8.19 Mallard HW Mallard
including 211.9 231.0 1.1 15.4
OSK-W-17-1347 164.0 166.0 2.0 4.64 Vein
including 165.2 166.0 0.8 11.5
249.4 252.2 2.8 11.1 Mallard FW Mallard
including 250.4 251.3 0.9 27.3
OSK-W-17-1350 724.0 726.0 2.0 4.16 Caribou Ext. Caribou
OSK-W-17-1376 198.7 201.0 2.3 10.2 Vein
including 198.7 199.0 0.3 72.7
816.5 818.6 2.1 33.6 FW2 Underdog
including 816.5 817.3 0.8 73.3
OSK-W-17-1383 38.1 40.4 2.3 173 18.2 Bobcat Bobcat
including 39.0 39.4 0.4 990 100
OSK-W-17-1391 453.0 455.0 2.0 42.7 33 Caribou Ext. Caribou
including 454.0 454.6 0.6 133 100
OSK-W-17-1399 684.5 686.5 2.0 3.72 Caribou Ext. Caribou
OSK-W-17-1402 462.2 464.5 2.3 3.39 Caribou Caribou
820.1 822.3 2.2 47.7 18.4 FW1 Underdog
including 822.0 822.3 0.3 315 100
863.6 865.6 2.0 3.48 FW1 FW Underdog
including 864.1 864.9 0.8 7.60
873.5 876.3 2.8 3.35 FW1 FW Underdog
938.2 940.2 2.0 4.27 FW2 Underdog
OSK-W-18-823-W2 510.6 519.5 8.9 9.53 CS1 Caribou
including 510.6 513.5 2.9 18.0
526.0 528.0 2.0 5.22 CS1 Caribou
OSK-W-18-1402-W1 804.2 806.5 2.3 5.79 FW0 Underdog
including 805.0 805.5 0.5 23.5
OSK-W-18-1418 660.0 665.0 5.0 4.78 Caribou Ext. Caribou
710.0 717.0 7.0 5.95 Caribou Ext. Caribou
including 710.7 712.6 1.9 11.9
930.0 932.0 2.0 5.85 Caribou Ext. Caribou
OSK-W-18-1421 231.0 233.9 2.9 17.7 CW2 Caribou
OSK-W-18-1423 521.2 523.5 2.3 6.04 Caribou Ext. Caribou
556.0 559.0 3.0 3.97 Caribou Ext. Caribou

Notes:

  1. True widths are estimated at 65 – 80% of the reported core length interval.  See “Quality Control” below.
  2. Definitions: HW = Hanging Wall, FW = footwall, VNCR = Crustiform Vein, Ext = extension.
Hole Number Azimuth (°) Dip (°) Length (m) UTM E UTM N Section
OSK-EAG-12-333 333 -58 983 452459 5434565 2525
OSK-EAG-12-427 330 51 1215 452701 5434438 2675
OSK-EAG-13-480 331 -57 991 452400 5434486 2450
OSK-W-16-762 332 -56 1311 452730 5434409 2675
OSK-W-17-795 333 -65 1428 452646 5434421 2625
OSK-W-17-866-W2 332 -57 1332 452633 5434280 2525
OSK-W-17-901 328 -55 810 452391 5434638 2500
OSK-W-17-903-W2 329 -56 795 452539 5434692 2650
OSK-W-17-937-W1 333 -57 945 452897 5434430 2850
OSK-W-17-943 331 -55 744 452660 5434495 2675
OSK-W-17-1025 330 -58 990 452486 5434439 2475
OSK-W-17-1051 138 -68 1248 452313 5435323 2775
OSK-W-17-1087 328 -61 381 452255 5434830 2475
OSK-W-17-1168 329 -57 717 453464 5435090 3650
OSK-W-17-1221 335 -51 1079 453082 5434544 3050
OSK-W-17-1226 331 -51 934 453371 5434726 3400
OSK-W-17-1232 154 -47 351 452025 5434834 2275
OSK-W-17-1275 331 -55 912 452499 5434592 2575
OSK-W-17-1293 329 -70 828 452904 5434849 3050
OSK-W-17-1295 334 57 801 451559 5434288 1600
OSK-W-17-1310 312 -45 375 452209 5434617 2325
OSK-W-17-1319 310 -50 291 452222 5434607 2325
OSK-W-17-1320 328 -76 852 452904 5434849 3050
OSK-W-17-1334 334 -70 657 452839 5434895 3025
OSK-W-17-1336 335 -61 1149 452616 5434449 2600
OSK-W-17-1337 140 -57 360 452053 5434963 2350
OSK-W-17-1342 333 -50 282 452086 5434761 2300
OSK-W-17-1347 151 -61 489 452160 5435159 2550
OSK-W-17-1350 328 -55 843 452993 5434557 2975
OSK-W-17-1376 330 -50 1125 452426 5434380 2400
OSK-W-17-1383 331 -63 597 452767 5434864 2925
OSK-W-17-1391 327 -62 663 452981 5434900 3150
OSK-W-17-1399 332 -61 1053 453411 5434870 3500
OSK-W-17-1402 330 -59 1122 452616 5434449 2600
OSK-W-18-823-W2 330 -56 918 452565 5434414 2550
OSK-W-18-1402-W1 330 -59 1224 452616 5434449 2600
OSK-W-18-1418 334 -45 1077 453288 5434531 3225
OSK-W-18-1421 340 -47 918 452216 5434360 2200
OSK-W-18-1423 327 -61 792 453025 5434853 3150

OSK-EAG-12-333 intersected FW3 returning 3.07 g/t au over 4.8 metres and 116 g/t Au over 2.1 metres, and FW3U with 198 g /t Au over 2.3 metres in Underdog Corridor. The first interval is composed of up to 10% pyrite within pervasive silica flooding and 1% disseminated pyrite hosted in a porphyritic felsic dike with moderate chlorite, silica and sericite alteration. The second interval contains up to 20% pyrite and local visible gold within intense silica alteration. The third interval is composed of 3% pyrite stringers and local visible gold within a strongly sericitized and silicified felsic porphyritic dike.

OSK-EAG-12-427 intersected crustiform veins in FW4 returning 4.29 g/t Au over 2.2 metres in the Underdog Corridor. Mineralization is composed of 30% pyrite and 1% chalcopyrite in quartz-tourmaline-sericite veins.

OSK-EAG-13-480 intersected a vein in the Red Dog intrusion returning 37.1 g/t Au over 2.0 metres and FW1 FW with 6.68 g/t au over 2.0 metres. The first interval is composed of local visible gold in a quartz-carbonate vein with up to 3% pyrite and 1 % chalcopyrite. The second interval is composed of 1% pyrite stringers within porphyritic felsic dikes with moderate sericite, chlorite and fuchsite alteration.

OSK-W-17-762 intersected FW3 with 6.59 g/t Au over 2.5 metres in Underdog. Mineralization is composed of local visible gold within 10 centimetre silica flooding bands and 10% pyrite hosted in a porphyritic felsic intrusion.

OSK-W-17-795 intersected FW1 with 5.53 g/t Au over 3.4 metres in Underdog. Mineralization is composed of up to 10% pyrite stringers in silica flooding alteration hosted in a sericite altered felsic porphyritic dike.

OSK-W-17-866-W2 intersected FW0 with 4.92 g/t Au over 2.2 metres and FW3 with 7.59 g/t Au over 2.0 metres in Underdog Corridor. Mineralization from FW0 corresponds with 70% massive pyrite over 30 centimetres hosted within a felsic porphyritic dike with strong sericitization. The second interval is composed of up to 15% pyrite stringers and 1% disseminated pyrite hosted in a porphyritic felsic dike with moderate silica and sericite alteration.

OSK-W-17-901 intersected 8.27 g/t Au over 2.5 metres in FW3U. Mineralization is composed of a 10 centimetres silica flooding zone with 55% pyrite, 1% pyrite stringers and 7% disseminated pyrite in a bleached andesite.

OSK-W-17-903-W2 intersected 3.72 g/t Au over 4.9 metres in Zone 27 and 8.52 g/t Au over 2.0 metres in Z27 FW. The first interval is composed of disseminated and stringer pyrite at the contact between a silicified and weakly sericitized porphyritic dike and a weak chlorite, sericite altered andesite. The second interval is composed of pyrite traces hosted in an andesite with strong chlorite and carbonates alteration.

OSK-W-17-937-W1 intersected 26.6 g/t Au over 2.4 metres in Wolf 2. Mineralization is composed of up to 9% disseminated pyrite and 5% tourmaline-pyrite stringers at the contact between a bleached and strongly sericitized andesite and a small sericitized porphyritic felsic dike.

OSK-W-17-943 intersected 3.00 g/t Au over 2.0 metres in Caribou, and 4.51 g/t Au over 2.0 metres and 4.96 g/t Au over 2.0 metres in Wolf. The first interval is composed of up to 10% pyrite stringers and 2% disseminated pyrite hosted in a sericitized rhyolite and a sericitized porphyritic felsic dike. The second interval is composed of 3% pyrite stringers within a sericitized and chloritized porphyritic felsic dike. The third interval is composed of disseminated pyrite within an andesite with chlorite and carbonate alteration.

OSK-W-17-1025 intersected FW0 with 3.13 g/t Au over 2.3 metres. Mineralization is composed of 3% pyrite in silica flooding and 1% pyrite stringers in weakly sericitized porphyritic felsic dike.

OSK-W-17-1051 intersected FW3 with 7.6 g/t Au over 2.4 metres in Underdog Corridor. Mineralization is composed of up to 1% pyrite clusters and disseminated pyrite within a weak sericite and silica altered felsic porphyritic dike.

OSK-W-17-1087 intersected Mallard with 191 g/t Au over 2.6 metres. Mineralization is composed of 5% pyrite stringers and 1% disseminated pyrite within a sericite altered andesite.

OSK-W-17-1168 intersected 265 g/t Au over 2.4 metres in Caribou Corridor. Mineralization is composed of a crustiform vein with local visible gold and 1% pyrite clusters with tourmaline and fuchsite hosted in a gabbro with moderate chlorite alteration. The interval is 150 metres East of OSK-W-17-787 (7.21 g/t Au over 6.5 metres previously reported March 21, 2017).

OSK-W-17-1221 intersected 4.61 g /t Au over 2.0 metres in Wolf corridor. Mineralization is composed of a centimetre scale quartz carbonate vein in a chloritized and slightly silicified porphyritic felsic dike with traces of pyrite stringer.

OSK-W-17-1226 intersected 11.5 g/t Au over 2.0 metres, 10.4 g/t Au over 2.0 metres and 6.57 g/t Au over 2.2 metres in Caribou Extension. First and second intervals are composed of up to 10% pyrite-tourmaline stringers and disseminated pyrite in a sericitized rhyolite. The third interval is composed of 1% pyrite stringers hosted in porphyritic felsic dike with sericite alteration.

OSK-W-17-1232 intersected a vein returning 4.70 g/t Au over 2.0 metres in Caribou Corridor. Mineralization is composed of 3% disseminated pyrite and 7% ptygmatic tourmaline veins within a weak sericite altered rhyolite.

OSK-W-17-1275 intersected 4.49 g/t Au over 3.0 metres in Zone 27. Mineralization is composed of traces of pyrite stringers within a sericitized porphyritic felsic dike.

OSK-W-17-1293 intersected 6.54 g/t Au over 2.3 metres. Mineralization is composed of 1% pyrite and 1% chalcopyrite in quartz veins within a silicified, chloritized and carbonate altered monzonite (Red Dog intrusion).

OSK-W-17-1295 intersected FW3 with 3.36 g/t Au over 2.0 metres in Underdog. Mineralization is composed of 2% pyrite clusters in a sericitized and weakly silicified porphyritic felsic dike.

OSK-W-17-1310 intersected 3.61 g/t Au over 3.0 metres in Caribou and 3.37 g/t Au over 3.0 metres in Drake. The first interval is composed of 1% pyrite stingers within a chloritized and sericitized rhyolite. The second interval is composed of chloritized and sericitized andesite with 5% quartz-carbonate veins.

OSK-W-17-1319 intersected 5.80 g/t Au over 3.0 metres in Zone 27. Mineralization is composed of traces of disseminated pyrite within a sericitized porphyritic felsic dike.

OSK-W-17-1320 intersected 3.46 g/t Au over 3.3 metres in Caribou Extension. Mineralization is composed of disseminated pyrite and quartz-pyrite clusters in a chloritized, sericitized and silicified andesite.

OSK-W-17-1334 intersected 4.05 g/t Au over 2.0 metres in Bobcat. Mineralization is composed of disseminated pyrite and crustiform quartz-carbonate veins in a chloritized, silicified and carbonate altered gabbro.

OSK-W-17-1336 intersected three intervals: 4.16 g/t Au over 2.05 metres in a vein, 17.0 g/t Au over 3.0 metres in FW0 and 4.10 g/t Au over 2.0 metres in FW2, Underdog Corridor. The first interval is composed of 1% disseminated pyrite in a quartz vein within a strongly chloritized gabbro. The second interval is composed of up to 2% disseminated pyrite and 1% pyrite stringers in a sericitized porphyritic felsic dike. The third interval is composed of 1% pyrite stringers and 1% pyrite in quartz-carbonate veins within a moderate sericite and silica altered felsic porphyritic dike.

OSK-W-17-1337 intersected 3.39 g/t Au over 2.5 metres in Mallard. Mineralization is composed of up to 20% pyrite stringers within a sericitized, silicified and bleached andesite.

OSK-W-17-1342 intersected Mallard HW with 8.19 g/t Au over 2.1 metres. Mineralization is composed of traces of disseminated and clustered pyrite within a chloritized andesite.

OSK-W-17-1347 intersected 4.64 g/t Au over 2.0 metres in a vein and 11.1 g/t Au over 2.8 metres in Mallard FW. The first interval is composed of a five centimetre quartz vein with 15% pyrite clusters hosted in a chloritized, silicified and weakly sericitized andesite. The second interval is at the contact between a strongly chlorite, fuchsite altered andesite and a porphyritic felsic dike. Mineralization is composed of 10% pyrite clusters and 3% pyrite stringers. The vein is located 100 metres north-west of Mallard corridor and is not related to any known zones.

OSK-W-17-1350 intersected Caribou Extension with 4.16 g/t Au over 2.0 metres. The mineralization is composed of up to 2% pyrite stringers within a sericitized, chloritized and carbonate altered large quartz eyes felsic porphyritic dike.

OSK-W-17-1376 intersected a vein returning 10.2 g/t Au over 2.3 metres and FW2 with 33.6 g/t Au over 2.1 metres. The first interval is composed of 5-10% quartz-carbonate veining with 5% disseminated pyrite in an andesite with chlorite, carbonate, sericite and silica alteration. Mineralization in FW2 is composed of a silica and sericite altered porphyritic dike with up to 5%, locally 80%, pyrite-tourmaline stringers.

OSK-W-17-1383 intersected 173 g/t Au over 2.3 metres in Bobcat. Mineralization is composed of local visible gold, 3% pyrite stringers with pervasive silica flooding within a gabbro with silica, carbonate and sericite alteration.

OSK-W-17-1391 intersected 42.7 g/t Au over 2.0 metres in Caribou Extension. Mineralization is composed of up to 10% pyrite stringers and 1% chalcopyrite, local visible gold, tourmaline ptygmatic veins, quartz-tourmaline veins and crustiform veins hosted in a silicified and bleached andesite.

OSK-W-17-1399 intersected 3.72 g/t Au over 2.0 metres in Caribou Extension. Mineralization is composed of up to 10% pyrite-tourmaline stringers within a strongly silicified rhyolite.

OSK-W-17-1402 intersected Caribou with 3.39 g/t Au over 2.3 metres and multiples intervals in Underdog corridor: FW1 with 47.7 g/t Au over 2.2 metres, FW1 FW with 3.48 g/t Au over 2.0 metres and 3.35 g/t Au over 2.8 metres, and FW2 with 4.27 g/t au over 2.0 metres. The first interval is composed of 3% pyrite stringers, 5% pyrite clusters within a sericitized andesite with weak silica and fuchsite alteration. The second interval is composed of local visible gold, 2% disseminated pyrite and 1% pyrite clusters, hosted in a moderately sericitized porphyritic dike. The third and fourth intervals are composed of 3% pyrite stringers and 1% disseminated pyrite in pervasive silica flooding within a sericitized porphyritic felsic dike. The last interval is composed of 2% pyrite stringers and 1% pyrite-silica flooding within a sericite, silica and fuchsite altered felsic porphyritic dike.

OSK-W-18-823-W2 intersected CS1 with 9.53 g/t Au over 8.9 metres and 5.22 g/t Au over 2.0 metres in Caribou. Mineralization is composed of 10% semi-massive pyrite bands, 10% pyrite stringers, up to 10% disseminated pyrite and up to 2% ptygmatic tourmaline veinlets hosted in a sericitized, chloritized and bleached andesite.

OSK-W-18-1402-W1 intersected 5.79 g/t Au over 2.3 metres in FW0. The mineralization is composed of 3% pyrite in a ptygmatic tourmaline vein at low core angle within a silicified and sericitized fragmental felsic intrusion.

OSK-W-18-1418 intersected 4.78 g/t Au over 5.0 metres, 5.95 g/t Au over 7.0 metres and 5.85 g/t Au over 2.0 metres in Caribou Extension. The first interval is composed of up to 5% pyrite stringers within a silicified and sericitized felsic porphyritic dike. The second interval is composed of up to 15% pyrite-tourmaline stringers hosted in a silicified and sericitized rhyolite. The third interval is composed of up to 10% pyrite-silica flooding within a silica altered andesite.

OSK-W-18-1421 intersected CW2 with 17.7 g/t Au over 2.9 metres in Caribou Corridor. Mineralization is composed of up to 8% pyrite stringers, 1% chalcopyrite, 1% sphalerite, ptygmatic tourmaline veins and local visible gold within a strongly silica altered rhyolite.

OSK-W-18-1423 intersected 6.04 g/t Au over 2.3 metres and 3.97 g/t Au over 3.0 metres in Caribou Extension. The first interval is composed of 7% disseminated pyrite within a bleached andesite. The second interval is composed of 4% disseminated pyrite, 2% pyrite stringers at a bleached andesite contact with a felsic porphyritic dike.

Qualified Person
The scientific and technical content of this news release has been reviewed, prepared and approved by Mr. Louis Grenier, M.Sc.A., P.Geo. (OGQ 800), Project Manager of the Windfall Lake gold project, who is a “Qualified Person” as defined by National Instrument 43-101 – Standards of Disclosure for Mineral Projects (“NI 43-101”).

Quality Control and Reporting Protocols
True widths determinations are estimated at 65-80% of the reported core length intervals for most of the zones. Assays are uncut except where indicated. Intercepts occur within geological confines of major zones but have not been correlated to individual vein domains at this time. Reported intervals include minimum weighted averages of 3.0 g/t Au diluted over core lengths of at least 2.0 metres. All NQ core assays reported were obtained by either 1-kilogram screen fire assay or standard 50-gram fire-assaying-AA finish or gravimetric finish at ALS Laboratories in Val d’Or, Québec, Thunder Bay and Sudbury, Ontario or Vancouver, British Colombia or Bureau Veritas in Timmins, Ontario. The 1-kilogram screen assay method is selected by the geologist when samples contain coarse gold or present a higher percentage of pyrite than surrounding intervals. Selected samples are also analyzed for multi-elements, including silver, using an Aqua Regia-ICP-AES method at ALS Laboratories. Drill program design, Quality Assurance/Quality Control (“QA/QC”) and interpretation of results is performed by qualified persons employing a QA/QC program consistent with NI 43-101 and industry best practices. Standards and blanks are included with every 20 samples for QA/QC purposes by the Corporation as well as the lab. Approximately 5% of sample pulps are sent to secondary laboratories for check assay.

About the Windfall Lake Gold Deposit
The Windfall Lake gold deposit is located between Val-d’Or and Chibougamau in the Abitibi region of Québec, Canada. The mineral resource defined by the previous operator comprises 2,762,000 tonnes at 8.42 g/t Au (748.000 ounces) in the indicated category and 3,512,000 tonnes at 7.62 g/t Au (860,000 ounces) in the inferred category (sourced from a technical report dated June 10, 2015 entitled “Preliminary Economic Assessment of the Windfall Lake Gold Property, Québec, Canada” with an effective date of April 28, 2015, prepared in accordance with NI 43-101). The Windfall Lake gold deposit is currently one of the highest grade resource-stage gold projects in Canada. The bulk of the mineralization occurs in the Main Zone, a southwest/northeast trending zone of stacked mineralized lenses, measuring approximately 600 metres wide and at least 1,400 metres long. The deposit is well defined from surface to a depth of 500 metres and remains open along strike and at depth. Mineralization has been identified only 30 metres from surface in some areas and as deep as 870 metres in others, with significant potential to extend mineralization up and down-plunge and at depth.

About Osisko Mining Inc.
Osisko is a mineral exploration company focused on the acquisition, exploration, and development of precious metal resource properties in Canada. Osisko holds a 100% in the high-grade Windfall Lake gold deposit located between Val-d’Or and Chibougamau in Québec and holds a 100% undivided interest in a large area of claims in the surrounding Urban Barry area and nearby Quevillon area (over 3,300 square kilometres), a 100% interest in the Marban project located in the heart of Québec’s prolific Abitibi gold mining district, and properties in the Larder Lake Mining Division in northeast Ontario, including the Jonpol and Garrcon deposits on the Garrison property, the Buffonta past producing mine and the Gold Pike mine property. The Corporation also holds interests and options in a number of additional properties in northern Quebec and Ontario.  Osisko continues to be well financed with approximately $190 million in cash and investments as of December 31, 2017.

Cautionary Note Regarding Forward-Looking Information
This news release contains “forward-looking information” within the meaning of the applicable Canadian securities legislation that is based on expectations, estimates, projections and interpretations as at the date of this news release. The information in this news release about the Windfall Lake gold deposit being one of the highest grade resource-stage gold projects in Canada; the current 800,000 metre drill program; the significance of new results from the ongoing drill program at the Windfall Lake gold project; the significance of assay results presented in this press release; the type of drilling included in the drill program (definition drilling, expansion drilling to the NE of the main deposit and adjacent Lynx deposit, and exploration drilling on the greater deposit and Urban-Barry project area); potential mineralization; the potential to extend mineralization up and down-plunge and at depth at the Windfall Lake gold deposit; the ability to realize upon any mineralization in a manner that is economic; the ability to complete any proposed exploration activities and the results of such activities, including the continuity or extension of any mineralization; and any other information herein that is not a historical fact may be “forward-looking information”. Any statement that involves discussions with respect to predictions, expectations, interpretations, beliefs, plans, projections, objectives, assumptions, future events or performance (often but not always using phrases such as “expects”, or “does not expect”, “is expected”, “interpreted”, “management’s view”, “anticipates” or “does not anticipate”, “plans”, “budget”, “scheduled”, “forecasts”, “estimates”, “believes” or “intends” or variations of such words and phrases or stating that certain actions, events or results “may” or “could”, “would”, “might” or “will” be taken to occur or be achieved) are not statements of historical fact and may be forward-looking information and are intended to identify forward-looking information. This forward-looking information is based on reasonable assumptions and estimates of management of the Corporation. at the time it was made, involves known and unknown risks, uncertainties and other factors which may cause the actual results, performance or achievements of Osisko to be materially different from any future results, performance or achievements expressed or implied by such forward-looking information. Such factors include, among others, risks relating to the ability of exploration activities (including drill results) to accurately predict mineralization; errors in management’s geological modelling; the ability of Osisko to complete further exploration activities, including drilling; property interests in the Windfall Lake gold project; the ability of the Corporation to obtain required approvals and complete transactions on terms announced; the results of exploration activities; risks relating to mining activities; the global economic climate; metal prices; dilution; environmental risks; and community and non-governmental actions. Although the forward-looking information contained in this news release is based upon what management believes, or believed at the time, to be reasonable assumptions. Osisko cannot assure shareholders and prospective purchasers of securities of the Corporation that actual results will be consistent with such forward-looking information, as there may be other factors that cause results not to be as anticipated, estimated or intended, and neither Osisko nor any other person assumes responsibility for the accuracy and completeness of any such forward-looking information, Osisko does not undertake, and assumes no obligation, to update or revise any such forward-looking statements or forward-looking information contained herein to reflect new events or circumstances, except as may be required by law.

For further information please contact:
John Burzynski. President and Chief Executive Officer
Telephone: (416) 363-8653

Osisko Intersects 71.9 g/t Au Over 2.9 Metres At Lynx

(Toronto, February 27, 2018)  Osisko Mining Inc. (OSK:TSX. “Osisko” or the “Corporation”) is pleased to provide new results from the ongoing drill program at its 100% owned Windfall Lake gold project located in the Abitibi greenstone belt, Urban ownship, Eeyou Istchee James Bay, Québec. The 800,000 metre drill program combines definition, expansion and exploration drilling in and around the main Windfall gold deposit and the adjacent Lynx deposit (located immediately NE of Windfall).

Significant new analytical results from 31 intercepts in 22 drill holes and 3 wedges focused on infill and expansion drilling in the Lynx deposit are presented below. Osisko continues to extend the known Lynx zones of mineralization through the application of the Windfall geological model and as the density of drilling increases.

Highlights from the new results include: 71.9 g/t Au over 2.9 metres OSK-W-17-941; 76.4 g/t Au over 2.4 metres and 52.5 g/t Au over 2.1 metres in OSK-W-17-1367-W1, 52.3 g/t Au over 2.1 metres in OSK-W-17-967, 40.6 g/t Au over 2.3 metres in OSK-W-17-1413; 48.0 g/t Au over 2.0 metres in OSK-W-18-1422 and 10.1 g/t Au over 6.5 metres in OSK-W-18-1415. Maps showing hole locations and full analytical results are available at www.osiskomining.com.

Hole Number From
(m)
To
(m)
Interval
(m)
Au (g/t)
uncut
Au (g/t)
cut to
100 g/t
Zone Corridor
OSK-W-17-898 375.5 380.7 5.2 3.75   Lynx 3 Lynx
including 375.5 376.2 0.7 10.8  
including 380.2 380.7 0.5 16.4  
OSK-W-17-907 893.0 895.0 2.0 5.71   Lynx 4 Lynx
including 894.0 895.0 1.0 10.3      
OSK-W-17-941 231.0 233.9 2.9 71.9 25.9 Lynx 2 Lynx
including 231.85 232.15 0.3 545 100
OSK-W-17-967 240.9 243.0 2.1 52.3 47.7 VNCR Lynx
including 242.0 243.0 1.0 109 100
OSK-W-17-1099 108.0 110.1 2.1 3.04   Lynx 2 Lynx
including 109.8 110.1 0.3 14.5  
OSK-W-17-1104 560.0 562.0 2.0 4.30   Lynx HW Lynx
including 560.5 561.3 0.8 10.4  
  591.8 594.0 2.2 4.06   Lynx HW Lynx
including 591.8 592.3 0.5 17.8  
OSK-W-17-1113 363.4 366.0 2.6 3.33   Vein Lynx
including 365.6 366.0 0.4 19.5  
OSK-W-17-1115 693.0 695.0 2.0 11.7   Vein Lynx
OSK-W-17-1147 712.8 716.5 3.7 3.29   Lynx 4 Lynx
including 712.8 713.1 0.3 24.4  
OSK-W-17-1177 575.0 577.0 2.0 3.21   Lynx 1 Lynx
OSK-W-17-1181-W3 1113.7 1116.4 2.7 6.11   Lynx 4 Lynx
OSK-W-17-1187 264.0 266.7 2.7 3.43   Lynx 3 Lynx
OSK-W-17-1190 430.0 432.0 2.0 5.91   Lynx 1 Lynx
including 430.6 431.6 1.0 11.6  
OSK-W-17-1193 979.0 981.8 2.8 4.48   Lynx 4 Lynx
OSK-W-17-1290 423.0 427.0 4.0 34.5   Vein Lynx
including 425.0 427.0 2.0 67.5      
OSK-W-17-1293 41.5 44.0 2.5 14.4   Lynx 1 Lynx
including 43.0 44.0 1.0 35.4  
OSK-W-17-1356 229.6 232.0 2.4 4.14   Lynx 1 Lynx
OSK-W-17-1367-W1 1009.5 1011.6 2.1 52.5 29,2 Lynx 4 Lynx
including 1010.3 1010.9 0.6 182 100
  1016.6 1019.0 2.4 76.4 28.3 Lynx 4 Lynx
including 1016.6 1017.1 0.5 331 100
OSK-W-17-1396 897.0 899.8 2.8 6.13   Lynx 4 Lynx
OSK-W-17-1413 296.0 298.3 2.3 40.6 39.4 Lynx 2 Lynx
including 297.4 298.3 0.9 103 100
  967.8 970.2 2.4 8.35   Lynx 6 Lynx
including 967.8 968.7 0.9 15.9  
OSK-W-18-1414-W1 842.4 846.0 3.6 8.20   Lynx 1 Lynx
including 842.4 843.0 0.6 20.6  
including 844.8 845.3 0.5 17.1  
  855.2 857.9 2.7 26.5   Lynx 1 Lynx
OSK-W-18-1415 457.0 463.5 6.5 10.1   Lynx HW Lynx
including 457.0 457.7 0.7 68.8  
OSK-W-18-1418 544.0 546.3 2.3 8.09   Lynx 4 Lynx
including 545.2 545.5 0.3 61.0  
  551.0 553.2 2.2 4.02   Lynx 4 Lynx
OSK-W-18-1422 386.0 388.0 2.0 48.0 21.8 Lynx HW Lynx
including 386.7 387.1 0.4 231 100
OSK-W-18-1423 107.5 109.6 2.1 7.77   Lynx 1 Lynx
including 108.5 108.9 0.4 38.7  
  221.2 223.7 2.5 4.65   VNCR Lynx

Notes:

  1. True widths are estimated at 65 – 80% of the reported core length interval.  See “Quality Control” below.
  2. Definitions: HW = Hanging Wall, VNCR = Crustiform Vein
Hole Number Azimuth (°) Dip (°) Length (m) UTM E UTM N Section
OSK-W-17-898 148 -51 555 453330 5435403 3675
OSK-W-17-907 134 -51 1317 453219 5435340 3575
OSK-W-17-941 330 -49 444 453434 5434969 3575
OSK-W-17-967 337 -62 720 453176 5434908 3300
OSK-W-17-1099 335 -56 264 453143 5434935 3300
OSK-W-17-1104 142 -50 1059 453383 5435455 3775
OSK-W-17-1113 138 -50 480 453280 5435347 3625
OSK-W-17-1115 153 -48 816 452796 5435118 3075
OSK-W-17-1147 335 -52 817 453241 5434380 3125
OSK-W-17-1177 340 -67 1422 454113 5435090 4225
OSK-W-17-1181-W3 133 -58 1247 453789 5435793 4275
OSK-W-17-1187 333 -55 477 453441 5435025 3600
OSK-W-17-1190 151 -49 1179 452905 5435152 3200
OSK-W-17-1193 141 -59 1803 453806 5435726 4275
OSK-W-17-1290 130 -52 462 453131 5435356 3500
OSK-W-17-1293 329 -70 828 452904 5434849 3050
OSK-W-17-1356 334 -67 429 453442 5435026 3600
OSK-W-17-1367-W1 131 -52 1161 453753 5435875 4300
OSK-W-17-1396 134 -52 956 453439 5435484 3825
OSK-W-17-1413 137 -53 996 453153 5435214 3450
OSK-W-18-1414-W1 133 -57 1198 453654 5435648 4100
OSK-W-18-1415 139 -49 561 453491 5435453 3850
OSK-W-18-1418 334 -45 1077 453288 5434531 3225
OSK-W-18-1422 140 -45 476 453492 5435452 3850
OSK-W-18-1423 327 -61 792 453025 5434853 3150
 

OSK-W-17-898 intersected Lynx 3 with 3.75 g/t Au over 5.2 metres. Mineralization is composed of 4% disseminated pyrite and 3% pyrite stringers hosted in quartz-tourmaline and quartz-carbonates veins in a fragmental felsic dike.

OSK-W-17-907 intersected Lynx 4 with 5.71 g/t Au over 2.0 metres. Mineralization is composed of 1% quartz-tourmaline veins with pyrite and 1% pyrite-silica flooding within a strongly sericitized and silicified rhyolite.

OSK-W-17-941 intersected 71.9 g/t Au over 2.9 metres in Lynx 2. Mineralization is composed of local visible gold within a silicified and weakly sericitized fragmental felsic dike.

OSK-W-17-967 intersected crustiform veins returning 52.3 g/t Au over 2.1 metres in the Lynx 2 Mineralization is composed of 1% disseminated pyrite in quartz-carbonate-chlorite veins within a sericitized gabbro.

OSK-W-17-1099 intersected 3.04 g/t Au over 2.1 metres in Lynx 2. Mineralization is composed of up to 2% pyrite clusters, 10% pyrite in pervasive silica flooding and 3% pyrite-tourmaline stringers hosted in a silica altered fragmental felsic dike.

OSK-W-17-1104 intersected 4.30 g/t Au over 2.0 metres and 4.06 g/t Au over 2.2 metres in Lynx HW. Mineralization is composed of up to 3% disseminated and stringer pyrite within a gabbro with sericite and fuchsite alteration.

OSK-W-17-1113 intersected 3.33 g/t Au over 2.6 metres. Mineralization is composed of quartz veins with trace pyrite stringers and 1% pyrite clusters and quartz-carbonate veins in a weakly sericitized rhyolite.

OSK-W-17-1115 intersected 11.7 g/t Au over 2.0 metres related to vein type mineralization. The interval is composed of 5% pyrite-tourmaline stringers and quartz veins within a chloritized andesite.

OSK-W-17-1147 intersected 3.29 g/t Au over 3.7 metres in Lynx 4. Mineralization is composed of 1% pyrite clusters with ptygmatic tourmaline veins within a sericitized rhyolite.

OSK-W-17-1177 intersected Lynx 1 with 3.21 g/t Au over 2.0 metres. Mineralization is composed of 1% pyrite stringers and tourmaline veins at a fuchsite altered contact between a gabbro and a porphyritic felsic dike.

OSK-W-17-1181-W3 intersected Lynx 4 with 6.11 g/t Au over 2.7 metres. Mineralization is composed of disseminated pyrite and tourmaline ptygmatic veins in a porphyritic felsic dike crosscutting a gabbro.

OSK-W-17-1187 intersected Lynx 3 with 3.43 g/t Au over 2.7 metres. Mineralization is composed of 4% pyrite clusters and 2% pyrite stringers with pervasive silica alteration in a sericitized porphyritic felsic dike.

OSK-W-17-1190 intersected 5.91 g/t Au over 2.0 metres in Lynx 1. Mineralization is composed of 5% pyrite stringers and 3% pyrite-silica flooding within a moderate sericite altered porphyritic felsic dike.

OSK-W-17-1193 intersected Lynx 4 with 4.48 g/t Au over 2.8 metres. Mineralization is composed of up to 2% pyrite stringers within a strongly sericitized felsic porphyritic dike.

OSK-W-17-1290 intersected 34.5 g/t Au over 4.0 metres in a vein within the Lynx Corridor. Mineralization is composed of traces of disseminated pyrite within a gabbro with strong chlorite and carbonate alteration.

OSK-W-17-1293 intersected Lynx 1 with 14.4 g/t Au over 2.5 metres. Mineralization is composed of disseminated pyrite, pyrite stringers and quartz-carbonates veins in a chloritized mafic intrusion bordered by the Bank fault deformation zone.

OSK-W-17-1356 intersected Lynx 1 with 4.14 g/t Au over 2.4 metres. Mineralization is composed of traces of pyrite clusters and/or fragments and pyrite stringers at the contact between a sericitized fragmental intrusive unit and an andesite.

OSK-W-17-1367-W1 intersected Lynx 4 with 52.5 g/t Au over 2.1 metres and 76.4 g/t Au over 2.4 metres. The first interval is composed of 4% pyrite clusters in 10 centimetres quartz-tourmaline veins and disseminated pyrite in a strongly fuchsite altered gabbro. The second interval is composed of trace pyrite-tourmaline stringer, 1% disseminated pyrite and 4% pyrite in ptygmatic tourmaline veinlets with trace chalcopyrite. Local visible gold is present in brittle fractures crosscutting tourmaline ptygmatic veins at contact between a small porphyritic dike and a fuchsite altered gabbro.

OSK-W-17-1396 intersected 6.13 g/t Au over 2.8 metres in Lynx 4. The mineralization is composed of up to 15% pyrite in quartz-tourmaline veins and 1% chalcopyrite within a sericitized and bleached mafic intrusion.

OSK-W-17-1413 intersected Lynx 2 with 40.6 g/t Au over 2.3 metres and Lynx 6 with 8.35 g/t Au over 2.4 metres. The first interval is composed of local visible gold and 1% pyrite clusters within a rhyolite with intense pervasive silica flooding. The second interval is composed of local visible gold and 3% disseminated pyrite in carbonate fracture filling, 2% pyrite stringers in smoky quartz veins hosted in a sheared andesite with chlorite alteration.

OSK-W-18-1414-W1 intersected Lynx 1 with 8.20 g/t Au over 3.6 metres and 26.5 g/t Au over 2.7 metres. The first interval is composed of up to 7% pyrite clusters, up to 3% pyrite stringers and ptygmatic quartz-tourmaline veins within a sericitized gabbro and rhyolite contact. The second interval is composed of up to 5% pyrite-silica flooding and 3% pyrite stringers within a strong silica altered rhyolite.

OSK-W-18-1415 intersected Lynx HW with 10.1 g/t Au over 6.5 metres. Mineralization is composed of local visible gold, up to 15% pyrite with pervasive silica flooding within a weakly bleached, sericitized and fuchsite altered gabbro.

OSK-W-18-1418 intersected Lynx 4 with 8.09 g/t Au over 2.3 metres and 4.02 g/t Au over 2.2 metres. Mineralization is composed of up to 5% pyrite stringers and 3% pyrite clusters in smoky quartz with, local carbonate in fracture filling and disseminated tourmaline hosted in a sericitized and silicified rhyolite.

OSK-W-18-1422 intersected Lynx hanging wall with 48.0 g/t Au over 2.0 metres. Mineralization is composed of up to 5% pyrite stringers, up to 3% pyrite clusters and 2% disseminated pyrite within a sericite, fuchsite and silica altered gabbro.

OSK-W-18-1423 intersected two interval 7.77 g/t Au over 2.1 metres in Lynx 1 and 4.65 g/t Au over 2.5 metres in a crustiform vein. The first interval is composed of 3% pyrite stringers, 1% pyrite clusters and crustiform quartz-carbonates veins within a strongly sericitized felsic porphyritic dike. The second interval is composed of up to 4% pyrite-tourmaline stringer and quartz-carbonate vein within a sericite, fuchsite, chlorite and carbonate altered andesite.

Qualified Person

The scientific and technical content of this news release has been reviewed, prepared and approved by Mr. Louis Grenier, M.Sc.A., P.Geo. (OGQ 800), Project Manager of the Windfall Lake gold project, who is a “qualified person” as defined by National Instrument 43-101 – Standards of Disclosure for Mineral Projects (“NI 43-101”).

Quality Control and Reporting Protocols

True widths determinations are estimated at 65-80% of the reported core length intervals for most of the zones. Assays are uncut except where indicated. Intercepts occur within geological confines of major zones but have not been correlated to individual vein domains at this time. Reported intervals include minimum weighted averages of 3.0 g/t Au diluted over core lengths of at least 2.0 metres. All NQ core assays reported were obtained by either 1-kilogram screen fire assay or standard 50-gram fire-assaying-AA finish or gravimetric finish at ALS Laboratories in Val d’Or, Québec, Thunder Bay and Sudbury, Ontario or Vancouver, British Colombia or Bureau Veritas in Timmins, Ontario. The 1-kilogram screen assay method is selected by the geologist when samples contain coarse gold or present a higher percentage of pyrite than surrounding intervals. Selected samples are also analyzed for multi-elements, including silver, using an Aqua Regia-ICP-AES method at ALS Laboratories. Drill program design, Quality Assurance/Quality Control (“QA/QC”) and interpretation of results is performed by qualified persons employing a QA/QC program consistent with NI 43-101 and industry best practices. Standards and blanks are included with every 20 samples for QA/QC purposes by the Corporation as well as the lab. Approximately 5% of sample pulps are sent to secondary laboratories for check assay.

About the Windfall Lake Gold Deposit

The Windfall Lake gold deposit is located between Val-d’Or and Chibougamau in the Abitibi region of Québec, Canada. The mineral resource defined by the previous operator comprises 2,762,000 tonnes at 8.42 g/t Au (748.000 ounces) in the indicated category and 3,512,000 tonnes at 7.62 g/t Au (860,000 ounces) in the inferred category (sourced from a technical report dated June 10, 2015 entitled “Preliminary Economic Assessment of the Windfall Lake Gold Property, Québec, Canada” with an effective date of April 28, 2015, prepared in accordance with NI 43-101). The Windfall Lake gold deposit is currently one of the highest grade resource-stage gold projects in Canada. The bulk of the mineralization occurs in the Main Zone, a southwest/northeast trending zone of stacked mineralized lenses, measuring approximately 600 metres wide and at least 1,400 metres long. The deposit is well defined from surface to a depth of 500 metres, and remains open along strike and at depth. Mineralization has been identified only 30 metres from surface in some areas and as deep as 870 metres in others, with significant potential to extend mineralization up and down-plunge and at depth.

About Osisko Mining Inc.

Osisko is a mineral exploration company focused on the acquisition, exploration, and development of precious metal resource properties in Canada. Osisko holds a 100% in the high-grade Windfall Lake gold deposit located between Val-d’Or and Chibougamau in Québec and holds a 100% undivided interest in a large area of claims in the surrounding Urban Barry area and nearby Quevillon area (over 3,300 square kilometres), a 100% interest in the Marban project located in the heart of Québec’s prolific Abitibi gold mining district, and properties in the Larder Lake Mining Division in northeast Ontario, including the Jonpol and Garrcon deposits on the Garrison property, the Buffonta past producing mine and the Gold Pike mine property. The Corporation also holds interests and options in a number of additional properties in northern Quebec and Ontario.  Osisko continues to be well financed with approximately $190 million in cash and investments (based on figures available as of December 31, 2017).

Cautionary Note Regarding Forward-Looking Information

This news release contains “forward-looking information” within the meaning of the applicable Canadian securities legislation that is based on expectations, estimates, projections and interpretations as at the date of this news release. The information in this news release about the Windfall Lake gold deposit being one of the highest grade resource-stage gold projects in Canada; the current 800,000 metre drill program; the significance of new results from the ongoing drill program at the Windfall Lake gold project; the significance of assay results presented in this press release describing the analytical results from 31 intercepts in 22 holes and 3 wedges focused on infill and expansion drilling in the Lynx deposit; the high-grade core developing at Lynx 4; the type of drilling included in the drill program (definition, expansion and exploration drilling in and around the main Windfall Lake gold deposit and the adjacent Lynx deposit, and exploration drilling on the greater deposit and Urban-Barry project area); potential mineralization; the potential to extend mineralization up and down-plunge and at depth at the Windfall Lake gold deposit; the ability to realize upon any mineralization in a manner that is economic; the ability to complete any proposed exploration activities and the results of such activities, including the continuity or extension of any mineralization; and any other information herein that is not a historical fact may be “forward-looking information”. Any statement that involves discussions with respect to predictions, expectations, interpretations, beliefs, plans, projections, objectives, assumptions, future events or performance (often but not always using phrases such as “expects”, or “does not expect”, “is expected”, “interpreted”, “management’s view”, “anticipates” or “does not anticipate”, “plans”, “budget”, “scheduled”, “forecasts”, “estimates”, “believes” or “intends” or variations of such words and phrases or stating that certain actions, events or results “may” or “could”, “would”, “might” or “will” be taken to occur or be achieved) are not statements of historical fact and may be forward-looking information and are intended to identify forward-looking information. This forward-looking information is based on reasonable assumptions and estimates of management of the Corporation. at the time it was made, involves known and unknown risks, uncertainties and other factors which may cause the actual results, performance or achievements of Osisko to be materially different from any future results, performance or achievements expressed or implied by such forward-looking information. Such factors include, among others, risks relating to the ability of exploration activities (including drill results) to accurately predict mineralization; errors in management’s geological modelling; the ability of Osisko to complete further exploration activities, including drilling; property interests in the Windfall Lake gold project; the ability of the Corporation to obtain required approvals and complete transactions on terms announced; the results of exploration activities; risks relating to mining activities; the global economic climate; metal prices; dilution; environmental risks; and community and non-governmental actions. Although the forward-looking information contained in this news release is based upon what management believes, or believed at the time, to be reasonable assumptions. Osisko cannot assure shareholders and prospective purchasers of securities of the Corporation that actual results will be consistent with such forward-looking information, as there may be other factors that cause results not to be as anticipated, estimated or intended, and neither Osisko nor any other person assumes responsibility for the accuracy and completeness of any such forward-looking information, Osisko does not undertake, and assumes no obligation, to update or revise any such forward-looking statements or forward-looking information contained herein to reflect new events or circumstances, except as may be required by law.

For further information please contact:
John Burzynski. President and Chief Executive Officer
Telephone: (416) 363-8653

Osisko Intersects 2.51 g/t Au Over 73.0 Metres At Garrison

(Toronto, February 15, 2018).  Osisko Mining Inc. (OSK:TSX) (“Osisko” or the “Corporation”) is pleased to announce the final results from the 2017 drill program at its 100% owned Garrison gold project located in Garrison Township, Ontario.  Over 85,000 metres of new drilling have been conducted by Osisko on the Garrison Project since its acquisition in late 2015.  A total of fifteen new intercepts in seven holes are reported in this release, with significant assay results presented in the table below.

Significant new results include:  2.51 g/t Au over 73.0 metres in OSK-G17-453; 1.98 g/t Au over 14.5 metres and 1.76 g/t Au over 25.5 metres in OSK-G17-461; 2.18 g/t Au over 9.0 metres in OSK-G17-445; and 1.27 g/t Au over 22.3 metres in OSK-G17-467.

The new results continue to show the increasing potential of the 903 Zone with proven extension towards SW, NW and South and to confirm the extent of known mineralization in the Garrcon Zone. Maps and sections showing hole locations and complete drilling results are available at www.osiskomining.com

Hole No. From (m) To (m) Interval (m) Au (g/t) uncut Au (g/t)
cut to
30 g/t
Zone
OSK-G17-445 233.0 242.0 9.0 2.18   Garrcon
including 241.0 242.0 1.0 16.0   Garrcon
  355.0 357.0 2.0 4.58   Garrcon
OSK-G17-453 371.0 444.0 73.0 2.51   903
including 375.0 376.0 1.0 8.54   903
and 378.3 379.6 1.3 8.62   903
and 384.5 387.0 2.5 4.59   903
and 428.8 429.8 1.0 10.3   903
and 438.8 442.8 4.0 6.10   903
OSK-G17-456 150.0 153.2 3.2 1.95   903
OSK-G17-461 42.0 56.5 14.5 1.98   903
including 42.0 47.0 5.0 4.25   903
  81.0 106.5 25.5 1.76   903
including 81.0 86.5 5.5 3.81   903
OSK-G17-463 196.0 256.5 60.5 0.71   903
including 212.0 230.5 18.5 1.39   903
OSK-G17-466 176.0 179.0 3.0 1.10   903
  244.7 245.1 0.4 14.1   903
OSK-G17-467 326.2 348.5 22.3 1.27   903
including 330.0 335.0 5.0 4.08   903
OSK-G17-468 313.4 332.6 19.2 0.75   903
including 322.0 328.0 6.0 1.35   903

Notes:  True Widths are estimated at 65 – 90% of the reported core length interval.  See “Quality Control” below.

Hole Number Azimuth (°) Dip (°) Length (m) UTM E UTM N Section
OSK-G17-445 340 -45 582.0 578739 5373697 1200W
OSK-G17-453 340 -45 483.0 577579 5373080 2500W
OSK-G17-456 340 -45 306.0 577329 5373183 2700W
OSK-G17-461 340 -45 228.0 577180 5373229 2825W
OSK-G17-463 340 -50 272.0 577442 5373164 2600W
OSK-G17-466 340 -45 324.0 577034 5373406 2900W
OSK-G17-467 340 -50 462.0 576885 5372790 3250W
OSK-G17-468 340 -50 477.0 576980 5372828 3150W
 

OSK-G17-445 intercepted two main mineralized intervals: 2.18 g/t Au over 9.0 metres; and 4.58 g/t Au over 2.0 metres. The intervals are associated with centimetre-scale quartz-carbonate stringers with trace sulfide as well as albite, sericite and carbonate alteration hosted by Temiskaming sediments.

OSK-G17-453 was drilled 25 metres underneath OSK-G17-390 (see press release Jan 15, 2018) as an infill hole intercepting 2.51 g/t Au over 73.0 metres. Mineralization is hosted by a thick syenite dyke with intense albite-hematite alteration and zones of strong fracturing, veining and coarse euhedral pyrite.

OSK-G17-456 was drilled in the south-central part of the 903 Zone, 250 metres northwest from OSK-G17-453 (described above). The hole intercepted a mineralized zone hosted in syenite dykes averaging 1.95 g/t Au over 3.2 metres. The syenite dykes are intruding fuchsite altered ultramafic rocks.

OSK-G17-461 intercepted two mineralized zones close to surface averaging 1.98 g/t Au over 14.5 metres and 1.76 g/t Au over 25.5 metres, both in syenite dykes with intense veining, albite alteration, specularite and pyrite.

OSK-G17-463 was drilled at the south part of the 903 Zone, intercepting a wide zone averaging 0.71 g/t Au over 60.5 metres that included 1.39 g/t Au over 18.5 metres. Mineralization is hosted by a crowded porphyritic syenite with moderate albite alteration and quartz veining.

OSK-G17-466 was drilled at the northern part of the 903 Zone and intersected 1.1 g/t Au over 3.0 metres in  a syenite dyke.  A small zone of hematite alteration in mafic volcanic rocks returned 14.1 g/t Au over 0.4 metres.

OSK-G17-467 was drilled 50m west of OSK-G17-439 (see press release Jan 15th 2018), to intercept the mineralization observed in the footwall of a diabase dyke. The hole successfully intercepted 1.27 g/t Au over 22.3 metres including 4.08 g/t Au over 5.0 metres in strongly sheared ultramafic rocks with quartz-sericite-pyrite alteration in the hanging wall of the mentioned diabase dyke.

OSK-G17-468 intercepted 0.75 g/t Au over 19.2 metres including 1.35 g/t Au over 6.0 metres in a deformed layer of sediments with albite-sericite alteration and disseminated pyrite.

Qualified Person
The scientific and technical content of this press release has been reviewed, prepared and approved by Mr. Gernot Wober, P.Geo. VP Exploration Canada for Osisko Mining Inc, who is a “Qualified Person” as defined by National Instrument 43-101 – Standards of Disclosure for Mineral Projects (“NI 43-101”).

Quality Control
True widths of the new exploration intercepts reported in this press release have yet to be determined, but are  typically 65 – 90% of reported core lengths. Additional drilling is planned for the immediate area which will enable the true width determination. Assays are uncut except where indicated, and calculated intervals are reported over a minimum length of 2 metres using a lower cutoff of 1.0 g/t Au. All HQ core assays reported were obtained by either whole sample rock metallic screen/fire assay or standard 30 gram fire-assaying with ICP finish at SGS Minerals Services in Cochrane, Ontario; and Bureau Veritas in Timmins, Ontario. The whole sample metallic screen assay method is selected by the geologist when samples contain coarse gold or any samples displaying gold initial fire assay values greater than 3g/t. Drill program design, Quality Assurance/Quality Control and interpretation of results is performed by qualified persons employing a Quality Assurance/Quality Control program consistent with NI 43-101 and industry best practices. Standards and blanks are included with every 20 samples for Quality Assurance/Quality Control purposes by the Corporation as well as the lab. Approximately 5% of sample pulps are sent to secondary laboratories for check assays.

About the Garrison Project
The Garrison Project area is comprised of 214 mineral claims, 25 mining leases, and 87 patent claims encompassing approximately 8,000 hectares.  Both Garrcon and Jonpol have resource estimates that are described in a technical report prepared in accordance with NI 43-101, which was completed by a previous operator Northern Gold Mining Inc. (entitled “Technical Report on the Golden Bear Project – Garrison Property: Larder Lake Mining Division, Garrison Township, Ontario, Canada”) dated December 30, 2013, with an effective date of December 30, 2013 (the “Garrison Technical Report”). The Garrison Technical Report was prepared by A.C.A. Howe International Limited for Northern Gold Mining Inc. (a wholly-owned subsidiary of Osisko) and is available on Osisko’s website at www.osiskomining.com and on SEDAR under Northern Gold Mining Inc.’s issuer profile at www.sedar.com.

Resource estimates were conducted by A.C.A. Howe International Limited according to CIM standards. The Garrcon Zone estimates showed 15.1 million tonnes with an average grade of 1.07 g/t Au (521,000 oz) in measured resources; 14.1 million tonnes averaging 1.16 g/t Au (526,000 oz) in indicated resources; and 1.7 million tonnes averaging 0.72 g/t Au (39,000 oz) in inferred resources. Potential underground resources of 5.1 million tonnes averaging 3.49 g/t Au (577,000 oz) in the inferred category were also outlined. Resources were reported at a cut-off grade of 0.4 g/t Au for open pit extraction and 1.5 g/t in a bulk underground mining scenario using a gold price of US$1,250/oz.

At the Jonpol Zone, resources were estimated as 0.87 million tonnes averaging 5.34 g/t Au (150,000 oz) in the indicated category; and 1.07 million tonnes averaging 5.56 g/t Au (192,000 oz) in inferred resources. Resources were reported at a cut-off grade of 3.0 g/t Au and assume an underground extraction scenario using a gold price of US$1,250/oz.

Readers are cautioned that inferred resources have a great amount of uncertainty as to their existence and as to whether they can be mined economically. It cannot be assumed that all or any part of the inferred resources will ever be upgraded to a higher category. Mineral resources are not mineral reserves and do not have demonstrated economic viability.

Garrcon Zone
The Garrcon Zone has a shallow plunge eastward along the footwall of the Destor-Porcupine Fault Zone with the bulk of the resource in the western, more densely drilled area. The zone is exposed at surface and has potential for open pit bulk mining at an estimated overall stripping ratio of 1.8:1. There is potential for additional underground resources below the pit and along the easterly plunge of the zone, which is open for further exploration down dip and along strike.

The Garrcon shaft was sunk in 1935 and 1936 by the Consolidated Mining and Smelting Co. of Canada (“Cominco”) and the Shaft and South Zones were tested for high grade gold mineralization. Cominco drove approximately 1,430 metres of drifts and cross cuts, mining underground veins. Diamond drilling by Cominco and Lac Minerals Ltd. in the mid-to-late 1980s identified broad sections of low grade mineralization. In 2006-2007, ValGold Resources Ltd. conducted additional drilling confirming these zones. From 2009-2013 Northern Gold Mining Inc. conducted 97,000 metres of diamond drilling which delineated the current resource.

In 2014, Northern Gold Mining Inc. was granted a trial mining permit allowing the extraction of up to 150,000 tonnes. Northern Gold Mining Inc. mined 73,534 dry tonnes which was processed at the nearby Holt mill facility recovering 3,516 oz at an average head grade of 1.55 g/t and recovery of 95.9%.

Jonpol Zone
Jonpol is situated in the Munro Fault Zone, a west striking splay off the north side of the Destor-Porcupine Fault. Hosted in a shear zone tens of metres wide in altered mafic volcanic rocks, the deposit consists of four high grade gold mineralized zones (JP, JD, RP and East) over a strike length of 1.7 kilometers. Gold mineralization is hosted in quartz carbonate veins, in mafic and ultramafic host rocks, and is associated with intense albite and/or sericite alteration and pyrite mineralization.

In 1997, a 49,087 tonne bulk sample was extracted from the central part of the JP zone by Hillsborough Resources Limited with an average grade of 6.7 g/t which produced 9,476 ounces Au. From 1985-2013, over 130,000 metres of drilling was completed on the property by previous operators. Development work on the JP zone included the sinking of a 184 metre shaft as well as development of a ramp to the 150 metres level with mining on six sublevels. The Jonpol infrastructure underwent reclamation in the late 1990s and was closed out in 2001, but the existing ramp and shaft are preserved.

903 Zone
This third mineralized zone present at Garrison was not included in the resource estimate reported by the previous operator in 2013. Mineralization at the 903 was discovered in 1945 by Wright-Hargreaves Mines Ltd. In 1988 Lac Minerals acquired the claims covering the current 903 Zone and completed 17 drill holes totaling 4,823 metres. The property was optioned in 1990 to Jonpol and T&H Resources and subsequently returned to Lac Minerals in 1991. Northern Gold acquired the claims from a subsidiary of Barrick Gold in 2013, conducting surface exploration and six drill holes.

About Osisko Mining Inc.
Osisko is a mineral exploration company focused on the acquisition, exploration, and development of precious metal resource properties in Canada. Osisko holds a 100% in the high-grade Windfall Lake gold deposit located between Val-d’Or and Chibougamau in Québec and holds a 100% undivided interest in a large area of claims in the surrounding Urban Barry area, a 100% interest in the Marban project located in the heart of Québec’s prolific Abitibi gold mining district, and properties in the Larder Lake Mining Division in northeast Ontario, including the Garrcon, Jonpol and 903 zones on the Garrison property. Osisko continues to be well financed with approximately $190 million in cash and equity investments at the end of Q4 2017.

Cautionary Note Regarding Forward-Looking Information
This news release contains “forward-looking information” within the meaning of the applicable Canadian securities legislation that is based on expectations, estimates, projections and interpretations as at the date of this news release. The information in this news release about the ongoing drill program at the Garrison gold project; results of the current drill program; the significance of new drill results reported in this press release; the ability of new drill results to demonstrate potential for expansion of the previously defined Garrcon, Jonpol and 903 mineralized zones at the Garrison project; the scope of the 2017 drill program; that the 2017 drill program will follow new extensions of these mineralized zones to further define the scale of mineralization at the Garrison project; potential mineralization; the ability to realize upon any mineralization in a manner that is economic; the ability to complete any proposed exploration activities and the results of such activities; the continuity or extension of any mineralization; and any other information herein that is not a historical fact may be “forward-looking information”. Any statement that involves discussions with respect to predictions, expectations, interpretations, beliefs, plans, projections, objectives, assumptions, future events or performance (often but not always using phrases such as “expects”, or “does not expect”, “is expected”, “interpreted”, “management’s view”, “anticipates” or “does not anticipate”,  “plans”, “budget”, “scheduled”, “forecasts”, “estimates”, “believes” or “intends” or variations of such words and phrases or stating that certain actions, events or results “may” or “could”, “would”, “might” or “will” be taken to occur or be achieved) are not statements of historical fact and may be forward-looking information and are intended to identify forward-looking information. This forward-looking information is based on reasonable assumptions and estimates of management of the Corporation, at the time it was made, involves known and unknown risks, uncertainties and other factors which may cause the actual results, performance or achievements of Osisko to be materially different from any future results, performance or achievements expressed or implied by such forward-looking information. Such factors include, among others, risks relating to the ability of exploration activities (including drill results) to accurately predict mineralization; errors in management’s geological modelling; the ability of Osisko to complete further exploration activities, including drilling; property interests; the ability of the Corporation to obtain required approvals and complete transactions on terms announced; the results of exploration activities; risks relating to mining activities; the global economic climate; metal prices; dilution; environmental risks; and community and non-governmental actions. Although the forward-looking information contained in this news release is based upon what management believes, or believed at the time, to be reasonable assumptions, Osisko cannot assure shareholders and prospective purchasers of securities of the Corporation that actual results will be consistent with such forward-looking information, as there may be other factors that cause results not to be as anticipated, estimated or intended, and neither Osisko nor any other person assumes responsibility for the accuracy and completeness of any such forward-looking information. Osisko does not undertake, and assumes no obligation, to update or revise any such forward-looking statements or forward-looking information contained herein to reflect new events or circumstances, except as may be required by law.

For further information please contact:
John Burzynski, President and Chief Executive Officer
Telephone: (416) 363-8653

Osisko Mining Provides Ontario Exploration Update

(Toronto, February 13, 2018) Osisko Mining Inc. (OSK:TSX) (“Osisko” or the “Corporation”) is pleased to provide an update on the progress of exploration at its 100% owned Garrison gold project located in Garrison Township, Ontario.

Osisko has been conducting new exploration and definition drilling at Garrison for 20 months, since early 2016.  As of the end of January 2018, Osisko has completed 85,000 metres of new drilling to complement the pre-existing 108,000 metres drilled at Garrison by previous operators.  The company has re-evaluated previous drilling from the Jonpol Zone, continued resource delineation at the Garrcon Zone and substantially expanding the 903 Zone with exploration drilling in the southwest part of the property.  Dewatering and geological mapping of the Garrcon bulk sample pits was conducted during 2017.  Work is in progress on interpretation of the geological model of the Garrcon and 903 zones, including mineralization controls.

Exploration Budget for 2018:  $3M
Osisko’s 2018 exploration budget for the Garrison deposit totals approximately $3 million.  This includes resource estimation work, additional resource-oriented infill drilling, metallurgical work and exploration drilling on the Garrison property.

Garrison:  Updated Resource Estimation Planned for July 2018
Osisko’s updated resource estimate for the Garrison Project is scheduled to be released in July 2018. 

The Garrison property consists of three mineralized zones with different styles:  the Garrcon Zone is hosted by Temiskaming sediments in the footwall of the Destor Porcupine Fault Zone (PDFZ); the Jonpol Zone comprises 1.7 km of structurally controlled mineralization along the Munro Shear Zone hosted by mafic to ultramafic volcanic rocks; and the 903 Zone is hosted by syenite dykes intruding ultramafic rocks along the PDFZ.  The Jonpol and 903 zones remain open to the southwest and northwest respectively. The Garrcon, Jonpol and 903 zones will all be included in the 2018 updated resource.

Property Disposals
Through the course of 2017 Osisko vended the Catharine, DeSantis and Swayze exploration projects to other mining companies. 

President and CEO of Osisko John Burzynski commented: “Although our main focus is on the Windfall project in Québec, Osisko has continued work on the Garrison project, with the goal of updating the resource and improving our understanding of the potential of the Garrcon, Jonpol and 903 zones.  Drilling in 2017 was successful at significantly expanding the size of the 903 Zone.  Our upcoming July resource estimate will include all three zones (Garrcon, Jonpol and 903), and we will continue to evaluate the extensions of known mineralization with exploration drilling in 2018.” 

Qualified Person
The scientific and technical content of this press release has been reviewed, prepared and approved by Mr. Gernot Wober, P.Geo. VP Exploration Canada for Osisko Mining Inc, who is a “Qualified Person” as defined by National Instrument 43-101 – Standards of Disclosure for Mineral Projects (“NI 43-101”).

About the Garrison Project

The Garrison Project area is comprised of 214 mineral claims, 25 mining leases, and 87 patent claims encompassing approximately 8,000 hectares.  Both Garrcon and Jonpol have resource estimates that are described in a technical report prepared in accordance with NI 43-101, which was completed by a previous operator Northern Gold Mining Inc. (entitled “Technical Report on the Golden Bear Project – Garrison Property: Larder Lake Mining Division, Garrison Township, Ontario, Canada”) dated December 30, 2013, with an effective date of December 30, 2013 (the “Garrison Technical Report”). The Garrison Technical Report was prepared by A.C.A. Howe International Limited for Northern Gold Mining Inc. (a wholly-owned subsidiary of Osisko) and is available on Osiskos website at www.osiskomining.com and on SEDAR under Northern Gold Mining Inc.s issuer profile at www.sedar.com.

Resource estimates were conducted by A.C.A. Howe International Limited according to CIM standards. The Garrcon Zone estimates showed 15.1 million tonnes with an average grade of 1.07 g/t Au (521,000 oz) in measured resources; 14.1 million tonnes averaging 1.16 g/t Au (526,000 oz) in indicated resources; and 1.7 million tonnes averaging 0.72 g/t Au (39,000 oz) in inferred resources. Potential underground resources of 5.1 million tonnes averaging 3.49 g/t Au (577,000 oz) in the inferred category were also outlined. Resources were reported at a cut-off grade of 0.4 g/t Au for open pit extraction and 1.5 g/t in a bulk underground mining scenario using a gold price of US$1,250/oz.

At the Jonpol Zone, resources were estimated as 0.87 million tonnes averaging 5.34 g/t Au (150,000 oz) in the indicated category; and 1.07 million tonnes averaging 5.56 g/t Au (192,000 oz) in inferred resources. Resources were reported at a cut-off grade of 3.0 g/t Au and assume an underground extraction scenario using a gold price of US$1,250/oz.

Readers are cautioned that inferred resources have a great amount of uncertainty as to their existence and as to whether they can be mined economically. It cannot be assumed that all or any part of the inferred resources will ever be upgraded to a higher category. Mineral resources are not mineral reserves and do not have demonstrated economic viability.

Garrcon Zone

The Garrcon Zone has a shallow plunge eastward along the footwall of the Destor-Porcupine Fault Zone with the bulk of the resource in the western, more densely drilled area. The zone is exposed at surface and has potential for open pit bulk mining at an estimated overall stripping ratio of 1.8:1. There is potential for additional underground resources below the pit and along the easterly plunge of the zone, which is open for further exploration down dip and along strike.

The Garrcon shaft was sunk in 1935 and 1936 by the Consolidated Mining and Smelting Co. of Canada (“Cominco”) and the Shaft and South Zones were tested for high grade gold mineralization. Cominco drove approximately 1,430 metres of drifts and cross cuts, mining underground veins. Diamond drilling by Cominco and Lac Minerals Ltd. in the mid-to-late 1980s identified broad sections of low grade mineralization. In 2006-2007, ValGold Resources Ltd. conducted additional drilling confirming these zones. From 2009-2013 Northern Gold Mining Inc. conducted 97,000 metres of diamond drilling which delineated the current resource.

In 2014, Northern Gold Mining Inc. was granted a trial mining permit allowing the extraction of up to 150,000 tonnes. Northern Gold Mining Inc. mined 73,534 dry tonnes which was processed at the nearby Holt mill facility recovering 3,516 oz at an average head grade of 1.55 g/t and recovery of 95.9%.

Jonpol Zone

Jonpol is situated in the Munro Fault Zone, a west striking splay off the north side of the Destor-Porcupine Fault. Hosted in a shear zone tens of metres wide in altered mafic volcanic rocks, the deposit consists of four high grade gold mineralized zones (JP, JD, RP and East) over a strike length of 1.7 kilometers. Gold mineralization is hosted in quartz carbonate veins, in mafic and ultramafic host rocks, and is associated with intense albite and/or sericite alteration and pyrite mineralization.

In 1997, a 49,087 tonne bulk sample was extracted from the central part of the JP zone by Hillsborough Resources Limited with an average grade of 6.7 g/t which produced 9,476 ounces Au. From 1985-2013, over 130,000 metres of drilling was completed on the property by previous operators. Development work on the JP zone included the sinking of a 184 metre shaft as well as development of a ramp to the 150 metres level with mining on six sublevels. The Jonpol infrastructure underwent reclamation in the late 1990s and was closed out in 2001, but the existing ramp and shaft are preserved.

903 Zone

This third mineralized zone present at Garrison was not included in the resource estimate reported by the previous operator in 2013. Mineralization at the 903 was discovered in 1945 by Wright-Hargreaves Mines Ltd. In 1988 Lac Minerals acquired the claims covering the current 903 Zone and completed 17 drill holes totaling 4,823 metres. The property was optioned in 1990 to Jonpol and T&H Resources and subsequently returned to Lac Minerals in 1991. Northern Gold acquired the claims from a subsidiary of Barrick Gold in 2013, conducting surface exploration and six drill holes.

About Osisko Mining Inc.
Osisko is a mineral exploration company focused on the acquisition, exploration, and development of precious metal resource properties in Canada. Osisko holds a 100% in the high-grade Windfall Lake gold deposit located between Val-dOr and Chibougamau in Québec and holds a 100% undivided interest in a large area of claims in the surrounding Urban Barry area and nearby Quévillon area (over 3,300 square kilometres), a 100% interest in the Marban project located in the heart of Québecs prolific Abitibi gold mining district, and properties in the Larder Lake Mining Division in northeast Ontario, including the Jonpol and Garrcon deposits on the Garrison property, the Buffonta past producing mine and the Gold Pike mine property. The Corporation also holds interests and options in a number of additional properties in northern Québec and Ontario.  Osisko continues to be well financed with approximately $190 million in cash and investments as of the end of Q4 2017.

Cautionary Note Regarding Forward-Looking Information
This news release contains “forward-looking information” within the meaning of the applicable Canadian securities legislation that is based on expectations, estimates, projections and interpretations as at the date of this news release. The information in this news release about the timing and ability (if at all) of Osisko to prepare a Preliminary Economic Assessment and initial resource estimate for the Windfall deposit; the timing and ability (if at all) of Osisko to prepare a feasibility study for the Windfall deposit; Osiskos exploration budget for 2018; the advancement of the Windfall and Lynx deposits through drilling and exploration initiatives; the expansion of the previously known mineralized zones and the discovery of the new Lynx deposit, and Wolf and Bobcat zones; continued exploration and drilling at the Windfall and Lynx deposits and any extension of the mineralized zones; the continued advancement, and rate of advancement, of the exploration ramp; the timing and ability (if at all) of Osisko to obtain permits for the exploration ramp towards Lynx; the ability of the Windfall Lake gold project to be one of the highest-grade resource stage gold projects in Canada; the significance of drill results from the ongoing drill program at the Windfall Lake gold project; the timing and ability (if at all) of Osisko to complete additional property acquisitions in Lebel-sur-Quévillon; the benefits of a potential processing plant in Lebel-sur-Quévillon; the timing and ability (if at all) of Osisko to prepare  an initial resource estimate in respect of the Osborne-Bell deposit; exploration planned at the Fox and Black Dog discoveries; proposed exploration work at the Urban Barry block; proposed exploration work on the Quévillon block; the continued fast pace of our work in 2018; our ability to sustain and add shareholder value; Osiskos ability (if at all) to develop into a mining camp; the type of drilling included in the drill program; potential mineralization; the ability to realize upon any mineralization in a manner that is economic; the ability to complete any proposed exploration activities and the results of such activities; and any other information herein that is not a historical fact may be “forward-looking information”. Any statement that involves discussions with respect to predictions, expectations, interpretations, beliefs, plans, projections, objectives, assumptions, future events or performance (often but not always using phrases such as “expects”, or “does not expect”, “is expected”, “interpreted”, “managements view”, “anticipates” or “does not anticipate”, “plans”, “budget”, “scheduled”, “forecasts”, “estimates”, “believes” or “intends” or variations of such words and phrases or stating that certain actions, events or results “may” or “could”, “would”, “might” or “will” be taken to occur or be achieved) are not statements of historical fact and may be forward-looking information and are intended to identify forward-looking information. This forward-looking information is based on reasonable assumptions and estimates of management of the Corporation at the time it was made. This forward-looking information involves known and unknown risks, uncertainties and other factors which may cause the actual results, performance or achievements to be materially different from any results, performance or achievements expressed or implied by such forward-looking information. Such factors include, among others, risks relating to the ability of exploration activities to accurately predict mineralization; errors in managements geological modelling; delays in the turnaround of assay data; lack of adequate drill density; Osiskos timing and ability (if at all) to complete further exploration activities, including drilling; property interests in the Windfall Lake gold project and Osborne-Bell gold deposit; the results of exploration activities; risks relating to mining activities; the global economic climate; metal prices; dilution; environmental risks; and community and non-governmental actions. Although the forward-looking information contained in this news release is based upon what management believes, or believed at the time, to be reasonable assumptions, Osisko cannot assure shareholders and prospective purchasers of securities of the Corporation that actual results will be consistent with such forward-looking information, as there may be other factors that cause results not to be as anticipated, estimated or intended, and neither Osisko nor any other person assumes responsibility for the accuracy and completeness of any such forward-looking information. Osisko does not undertake, and assumes no obligation, to update or revise any such forward-looking statements or forward-looking information contained herein to reflect new events or circumstances, except as may be required by law.

For further information please contact:
John Burzynski. President and Chief Executive Officer
Telephone: (416) 363-8653

Osisko Mining Provides Quebec Exploration Update

(Toronto, February 8, 2018)  Osisko Mining Inc. (OSK:TSX) (“Osisko” or the “Corporation”) is pleased to provide an update on the progress of exploration at its 100% owned Windfall Lake, Urban Barry and Quévillon gold projects located in the Abitibi greenstone belt, Eeyou Istchee James Bay, Québec.

Osisko has been conducting new exploration and definition drilling at Windfall for 26 months, since late October 2015.  As of the end of January 2018, Osisko has completed 518,000 metres of the planned 800,000 metres to complement the pre-existing 180,000 metres drilled at Windfall by previous operators. 

The company is rapidly advancing the Windfall and Lynx deposits through a balance of resource delineation drilling and exploration drilling for extensions and new mineralized zones.  Osisko has been successful in the past two years at significantly expanding the known areas of mineralization in the Windfall system and reinterpreting the geological model of the Windfall deposit.  Drilling over the past 18 months has been directed by the evolving intrusion-related geological model, leading to the discovery of significant extensions of the previously known mineralized zones, and to the discovery of the new Lynx deposit, Wolf and Bobcat zones.

Exploration Budget for 2018:  $100M
Osisko’s 2018 exploration budget for the Windfall/Lynx deposits, Urban Barry and Quévillon project areas totals approximately $100 million.  This budget includes resource estimation work, resource-oriented drilling, exploration ramp and underground bulk sampling of known mineralized zones, metallurgical work, permitting, PEA and feasibility studies, exploration drilling proximal to Windfall and Lynx, and exploration drilling on the greater Urban Barry and Quévillon properties.

Windfall/Lynx:  Initial Resource Estimation Planned for May 2018, PEA Planned for June 2018
Osisko’s initial resource for Windfall is scheduled to be released in early May, a delay of six weeks from the previous Q1 2018 estimated completion, due to the slower than anticipated turnaround of assay data.  Osisko plans to have a Preliminary Economic Assessment completed in June 2018 for the Windfall deposit subsequent to the release of the initial resource estimate.

The main Windfall deposit and the Lynx deposit (discovered by Osisko in early 2017) remain open to the NE and at depth, and surface exploration drilling is continuing.  Newly discovered extensions of the main Windfall deposit (Caribou Extension, Zone 27 Extension, Underdog Expansion), and part of the Lynx deposit and its sub zones below 350 metres depth and further northeast of section 3750E, will not be included in the May 2018 resource estimate, due to lack of adequate drill density.  Infill drilling planned for the balance of 2018 will be focused on these areas, with the aim of including them in a planned Q1 2019 feasibility study.

The Corporation will continue significant exploration drilling at Windfall and Lynx through the balance of 2018 as it moves towards the feasibility study, and will continue drilling at the main Windfall and Lynx deposit to infill and extend the mineralized zones defined to date.

Windfall Exploration Ramp Progress
Dewatering of the historic exploration ramp was completed at the end of August 2017, and rehabilitation of the portal began in September. To date, 1,021 metres of rehabilitation have been completed. The remaining areas of the pre-existing exploration ramp are non-essential and will be rehabilitated as necessary.

The first underground blast was completed in late October (see October 27, 2017 press release). Underground infrastructure completed to date includes 45 metres of development for powder and cap magazines and 48 metres of slashes and safety bays. Three electrical substations have been installed as well as a water basin for future water treatment.

New advance towards the Main Zone commenced in late December, with 136 metres completed to date. The rate of advance is approximately 150 metres per month.  Bulk sampling in Zone 27, Caribou and Underdog is anticipated to occur in Q2 2018, Q3 2018 and Q4 2019 respectively.

Permits for the exploration ramp towards Lynx are anticipated in Q2 2018. Approximately 1,200 metres of exploration ramp extension are planned to reach Lynx.  Bulk sampling in Lynx is anticipated to occur in Q1 2019.

Property Acquisition in Lebel-sur-Quévillon
An alternatives assessment, considering environmental, technical, social and economic factors, has been completed on the location of the potential processing plant for the Windfall Project. The preferred option for the location of the potential processing plant is in the municipality of Lebel-sur-Quévillon (partially on the former Domtar site) and in the territory of Eeyou Istchee James Bay, Québec. The acquisition of approximately 560 hectares of property is expected to be finalized in Q1 2018. The proximity to a stable workforce and existing infrastructure, including power and water supply with available capacity were important components in the evaluation.

Osborne-Bell:  Initial Resource Estimation Planned for April 2018
Osisko commenced new drilling at the Osborne-Bell deposit with two rigs in early December 2017.  Re-evaluation of the approximately 200,000 metres of historical drilling results from previous operators and the addition of new information from Osisko’s drilling will be used to produce an initial resource, anticipated to be released in early April 2018.  Osborne-Bell is located approximately 20 kilometres northwest of the town of Lebel-sur-Quévillon.

Exploration Planned for Fox and Black Dog
A review of the exploration work conducted by Osisko in 2016 and 2017 at the Fox and Black Dog discoveries, within the context of the evolving geological model for the main Windfall deposit is currently under way.  New exploration drilling is planned for the two areas in H2 2018.

Exploration on the Urban Barry Block
Osisko has completed base line exploration programs on the Urban Barry block including airborne geophysics, ground geophysics, geological mapping and sampling and basal till sampling, developing a significant number of targets (over 100).  Osisko intends to include exploration drilling on priority targets developed by these base line programs in the course of 2018 work.

Exploration on the Quévillon Block
Osisko acquired the Quévillon Block in early 2017, and commenced the collection of base line exploration data including airborne geophysics, geological mapping and sampling, and basal till sampling.  The continuing work is approximately one-third complete, with several significant exploration targets already developed from both historical drilling and the new information collected.  Osisko intends to include exploration drilling on priority targets developed by these programs in the course of 2018 work.

President and CEO of Osisko John Burzynski commented: “We have been moving the Windfall project forward at a very quick pace since our first work started in late 2015.  We have added significant shareholder value through our substantial drilling and exploration programs at Windfall, with the discovery of the Lynx deposit and new previously unknown extensions of the main Windfall zones.  We plan to continue the fast pace of work on all of our projects in 2018 with over 20 active drills, and are eagerly anticipating the release of our first resource estimate for Windfall-Lynx in early May.  We will prepare a Preliminary Economic Assessment for Windfall-Lynx for June 2018 following the anticipated resource estimate, and will continue our exploration of the deposits through surface drilling and the progression of the exploration ramp, with the goal of moving to a feasibility study for Windfall in early 2019.  Property-wide exploration on our bank of existing targets will also resume in 2018, with the goal of adding new discoveries to our growing inventory of “drill bit success” at Windfall.  We will have another very busy year, with an exploration budget of approximately $100 million, and will continue to be the most active explorer in Québec in what we believe is a new developing mining camp.”

About the Windfall Lake Gold Deposit
The Windfall Lake gold deposit is located between Val-dOr and Chibougamau in the Abitibi region of Québec, Canada. The mineral resource defined by the previous operator comprises 2,762,000 tonnes at 8.42 g/t Au (748.000 ounces) in the indicated category and 3,512,000 tonnes at 7.62 g/t Au (860,000 ounces) in the inferred category (sourced from a technical report dated June 10, 2015 entitled “Preliminary Economic Assessment of the Windfall Lake Gold Property, Québec, Canada” with an effective date of April 28, 2015, prepared in accordance with NI 43-101). The Windfall Lake gold deposit is currently one of the highest-grade resource-stage gold projects in Canada. The bulk of the mineralization occurs in the Main Zone, a southwest/northeast trending zone of stacked mineralized lenses, measuring approximately 600 metres wide and at least 1,400 metres long. The deposit is well defined from surface to a depth of 500 metres and remains open along strike and at depth. Mineralization has been identified only 30 metres from surface in some areas and as deep as 870 metres in others, with significant potential to extend mineralization up and down-plunge and at depth.

About Osisko Mining Inc.
Osisko is a mineral exploration company focused on the acquisition, exploration, and development of precious metal resource properties in Canada. Osisko holds a 100% in the high-grade Windfall Lake gold deposit located between Val-dOr and Chibougamau in Québec and holds a 100% undivided interest in a large area of claims in the surrounding Urban Barry area and nearby Quévillon area (over 3,300 square kilometres), a 100% interest in the Marban project located in the heart of Québecs prolific Abitibi gold mining district, and properties in the Larder Lake Mining Division in northeast Ontario, including the Jonpol and Garrcon deposits on the Garrison property, the Buffonta past producing mine and the Gold Pike mine property. The Corporation also holds interests and options in a number of additional properties in northern Québec and Ontario.  Osisko continues to be well financed with approximately $190 million in cash and investments as of the end of Q4 2017.

Cautionary Note Regarding Forward-Looking Information
This news release contains “forward-looking information” within the meaning of the applicable Canadian securities legislation that is based on expectations, estimates, projections and interpretations as at the date of this news release. The information in this news release about the timing and ability (if at all) of Osisko to prepare a Preliminary Economic Assessment and initial resource estimate for the Windfall deposit; the timing and ability (if at all) of Osisko to prepare a feasibility study for the Windfall deposit; Osiskos exploration budget for 2018; the advancement of the Windfall and Lynx deposits through drilling and exploration initiatives; the expansion of the previously known mineralized zones and the discovery of the new Lynx deposit, and Wolf and Bobcat zones; continued exploration and drilling at the Windfall and Lynx deposits and any extension of the mineralized zones; the continued advancement, and rate of advancement, of the exploration ramp; the timing and ability (if at all) of Osisko to obtain permits for the exploration ramp towards Lynx; the ability of the Windfall Lake gold project to be one of the highest-grade resource stage gold projects in Canada; the significance of drill results from the ongoing drill program at the Windfall Lake gold project; the timing and ability (if at all) of Osisko to complete additional property acquisitions in Lebel-sur-Quévillon; the benefits of a potential processing plant in Lebel-sur-Quévillon; the timing and ability (if at all) of Osisko to prepare  an initial resource estimate in respect of the Osborne-Bell deposit; exploration planned at the Fox and Black Dog discoveries; proposed exploration work at the Urban Barry block; proposed exploration work on the Quévillon block; the continued fast pace of our work in 2018; our ability to sustain and add shareholder value; Osiskos ability (if at all) to develop into a mining camp; the type of drilling included in the drill program; potential mineralization; the ability to realize upon any mineralization in a manner that is economic; the ability to complete any proposed exploration activities and the results of such activities; and any other information herein that is not a historical fact may be “forward-looking information”. Any statement that involves discussions with respect to predictions, expectations, interpretations, beliefs, plans, projections, objectives, assumptions, future events or performance (often but not always using phrases such as “expects”, or “does not expect”, “is expected”, “interpreted”, “managements view”, “anticipates” or “does not anticipate”, “plans”, “budget”, “scheduled”, “forecasts”, “estimates”, “believes” or “intends” or variations of such words and phrases or stating that certain actions, events or results “may” or “could”, “would”, “might” or “will” be taken to occur or be achieved) are not statements of historical fact and may be forward-looking information and are intended to identify forward-looking information. This forward-looking information is based on reasonable assumptions and estimates of management of the Corporation at the time it was made. This forward-looking information involves known and unknown risks, uncertainties and other factors which may cause the actual results, performance or achievements to be materially different from any results, performance or achievements expressed or implied by such forward-looking information. Such factors include, among others, risks relating to the ability of exploration activities to accurately predict mineralization; errors in managements geological modelling; delays in the turnaround of assay data; lack of adequate drill density; Osiskos timing and ability (if at all) to complete further exploration activities, including drilling; property interests in the Windfall Lake gold project and Osborne-Bell gold deposit; the results of exploration activities; risks relating to mining activities; the global economic climate; metal prices; dilution; environmental risks; and community and non-governmental actions. Although the forward-looking information contained in this news release is based upon what management believes, or believed at the time, to be reasonable assumptions, Osisko cannot assure shareholders and prospective purchasers of securities of the Corporation that actual results will be consistent with such forward-looking information, as there may be other factors that cause results not to be as anticipated, estimated or intended, and neither Osisko nor any other person assumes responsibility for the accuracy and completeness of any such forward-looking information. Osisko does not undertake, and assumes no obligation, to update or revise any such forward-looking statements or forward-looking information contained herein to reflect new events or circumstances, except as may be required by law.

For further information please contact:
John Burzynski. President and Chief Executive Officer
Telephone: (416) 363-8653

Osisko Intersects 16.1 g/t Au Over 8.3 Metres at Garrison

(Toronto, January 31, 2018).  Osisko Mining Inc. (OSK:TSX, “Osisko” or the “Corporation”) is pleased to announce new results from the 2017 drill program at its 100% owned Garrison gold project located in Garrison Township, Ontario.  Over 80,000 metres of new drilling have been conducted by Osisko on the Garrison Project since its acquisition in late 2015.  A total of twenty-eight new intercepts in nine holes are reported in this release, with significant assay results presented in the table below.

Significant new results include:  16.1 g/t Au over 8.3 metres in OSK-G17-454; 3.02 g/t Au over 23.2 metres and 1.52 g/t Au over 50.0 metres in OSK-G17-389; 5.32 g/t Au over 12.6 metres in OSK-G17-459; and 8.11 g/t Au over 2.4 metres in OSK-G17-462.

The new results continue to show the increasing potential of the 903 Zone with proven extension towards SW, NW and South and to confirm the extent of known mineralization in the Garrcon Zone. Maps and sections showing hole locations and complete drilling results are available at www.osiskomining.com

Hole No. From (m) To (m) Interval
(m)
Au (g/t)
uncut
Au (g/t)
cut to

30 g/t
Zone
OSK-G17-361 60.0 68.0 8.0 1.05   903
  77.0 85.0 8.0 0.87   903
  99.4 104.6 5.2 1.48   903
OSK-G17-389 101.5 124.7 23.2 3.02   Garrcon
including 105.0 106.0 1.0 17.8   Garrcon
and 115.0 120.0 5.0 7.38   Garrcon
  181.2 194.0 12.8 1.00   Garrcon
  326.0 327.0 1.0 9.03   Garrcon
  470.0 475.0 5.0 1.46   Garrcon
  514.0 517.0 3.0 1.99   Garrcon
  537.0 587.0 50.0 1.52   Garrcon
including 542.0 561.0 19.0 2.97   Garrcon
OSK-G17-396 48.6 64.6 16.0 1.03   903
  220.2 221.2 1.0 7.12   903
OSK-G17-443 202.2 207.0 4.8 1.06   Garrcon
  186.5 192.0 5.5 0.77   Garrcon
  196.0 198.4 2.4 1.37   Garrcon
  373.2 375.0 1.8 1.32   Garrcon
  481.5 483.6 2.1 1.65   Garrcon
OSK-G17-448 370.7 390.6 19.9 0.93   903
including 381.7 390.6 8.9 1.34   903
  469.0 476.0 7.0 1.00   903
OSK-G17-454 67.0 75.3 8.3 16.1 14.9 903
  76.0 79.0 3.0 2.98   903
  96.7 102.6 5.9 1.76   903
OSK-G17-458 40.0 45.0 5.0 1.03   903
  53.2 60.3 7.1 1.22   903
OSK-G17-459 79.0 95.2 16.2 1.21   903
  105.0 117.6 12.6 5.32   903
including 109.3 113.0 3.7 11.5   903
  232.0 234.3 2.3 5.92   903
OSK-G17-462 58.0 61.0 3.0 3.26   903
  69.6 72.0 2.4 8.11   903

Notes:  True Widths are estimated at 65 – 90% of the reported core length interval.  See “Quality Control” below.

Hole Number Azimuth (°) Dip (°) Length (m) UTM E UTM N Section
OSK-G17-361 340 -45 235 577349 5373273 2650W
OSK-G17-389 0 -90 841 578669 5373887 1200W
OSK-G17-396 340 -45 233 576986 5373248 3000W
OSK-G17-443 340 -50 530 578658 5373771 1250W
OSK-G17-448 340 -50 300 577620 5373112 2450W
OSK-G17-454 340 -45 219 577264 5373214 2750W
OSK-G17-458 340 -45 181 577294 5373280 2700W
OSK-G17-459 340 -45 223 577310 5373232 2700W
OSK-G17-462 340 -45 370 576681 5373209 3300W

 

OSK-G17-361 was drilled at the eastern part of the 903 Zone and intercepted three mineralized intervals: 1.05 g/t Au over 8.0 metres, 0.87 g/t Au over 8.0 metres, and 1.48 g/t Au over 5.2 metres. The three zones correspond to syenite dykes with quartz veining and sulfides near their contacts with fuchsite altered ultramafic rocks.

OSK-G17-389 was a vertical hole drilled at the central part of the Garrcon Zone, intercepting the deep Garrcon mineralized zone. Six mineralized zones were intercepted including 3.02 g/t Au over 23.3 metres, shallow mineralization associated with zones of intense fracturing and quartz veining with albite, sericite and iron carbonate alteration. A second mineralized zone averaged 1.0 g/t Au over 12.8 metres with the same mineralization style. A third mineralized zone returned 9.03 g/t Au over 1.0 metre associated with a small zone of sericite – iron carbonate alteration with discrete quartz veins. Three additional deeper mineralized zones returned 1.46 g/t Au over 5.0 metres, 1.99 g/t Au over 3.0 metres, and 1.52 g/t Au over 50.0 metres. This deeper mineralization is associated with vein-breccia structures with sericitic alteration and occasional crustiform quartz-carbonate veins.

OSK-G17-396 was drilled in the central part of the 903 Zone where it intercepted two significant mineralized zones, the first averaging 1.03 g/t Au over 16.0 metres associated with the upper part of a syenite dyke with albitic alteration, quartz-carbonate veining, and pyrite dissemination;  and the second averaging 7.12 g/t Au over 1.0 meter, associated with the contact between ultramafic rocks and a thin deformed layer of Temiskaming sediments.

OSK-G17-443 targeted the Garrcon Zone, south of the bulk sample pits intercepting four mineralized zones including: 1.06 g/t Au over 4.75 metres; 1.37 g/t Au over 2.4 metres; 1.32 g/t Au over 1.8 metres; and 1.65 g/t Au over 2.1 metres. All intervals show the typical mineralization style of Garrcon, sediment-hosted fracture and vein zones with associated albite, sericite, and iron carbonate alteration.

OSK-G17-448 was drilled in the southeast part of the 903 Zone targeting mineralization observed in hole OSK-G17-390 (see press release January 15, 2018). The hole intercepted two mineralized zones, the first averaging 0.93 g/t Au over 19.9 metres associated with a syenite dyke with albite-hematite alteration, quartz veining and sulfide dissemination; the second intercepted 1.0 g/t Au over 7.0 metres at the discordant contact between Temiskaming sediments and ultramafic volcanic rocks.

OSK-G17-454 intercepted three mineralized zones, the first averaging 16.1 g/t Au over 8.3 metres associated with strong sodic alteration and veining in a coarse-grained syenite porphyry. A second zone averaged 2.98 g/t Au over 3.0 metres in fuchsite altered ultramafic rocks near the contact with the previously mentioned syenite dyke. A third deeper zone averaged 1.76 g/t Au over 5.9 metres associated with the upper contact of a syenite dyke with albite-hematite alteration.

OSK-G17-458 and OSK-G17-459 were drilled in the central 903 Zone, in the same section, above and below OSK-G17-326 (see press release February 1st, 2017), respectively. OSK-G17-458 intercepted 1.03 g/t Au over 5.04 metres and 1.22 g/t Au over 7.12 metres, both associated with contacts between ultramafic rocks and albite altered syenite dykes. OSK-G17-459 intercepted 1.21 g/t Au over 16.2 metres in altered syenite near the contact with ultramafic rocks; 5.32 g/t Au over 12.6 metres in a strong carbonate alteration zone within a syenite dyke with dissemination of coarse pyrite; and 5.92 g/t Au over 2.3 metres in green sericite – pyrite alteration hosted by Temiskaming sediments in a fracture zone near the contact with ultramafic rocks.

OSK-G17-462 was drilled in the northwestern part of the 903 Zone intercepting two mineralized intervals: the first averaging 3.26 g/t Au over 3.0 metres associated with a thin mineralized layer of sediments and 8.11 g/t Au over 2.5 metres in fuchsite altered ultramafic rocks near the contact with an albite altered lamprophyre dyke.

Qualified Person
The scientific and technical content of this press release has been reviewed, prepared and approved by Mr. Gernot Wober, P.Geo. VP Exploration Canada for Osisko Mining Inc, who is a “Qualified Person” as defined by National Instrument 43-101 – Standards of Disclosure for Mineral Projects (“NI 43-101”).

Quality Control
True widths of the new exploration intercepts reported in this press release have yet to be determined, but are  typically 65 – 90% of reported core lengths. Additional drilling is planned for the immediate area which will enable the true width determination. Assays are uncut except where indicated, and calculated intervals are reported over a minimum length of 2 metres using a lower cutoff of 1.0 g/t Au. All HQ core assays reported were obtained by either whole sample rock metallic screen/fire assay or standard 30 gram fire-assaying with ICP finish at SGS Minerals Services in Cochrane, Ontario; and Bureau Veritas in Timmins, Ontario. The whole sample metallic screen assay method is selected by the geologist when samples contain coarse gold or any samples displaying gold initial fire assay values greater than 3g/t. Drill program design, Quality Assurance/Quality Control and interpretation of results is performed by qualified persons employing a Quality Assurance/Quality Control program consistent with NI 43-101 and industry best practices. Standards and blanks are included with every 20 samples for Quality Assurance/Quality Control purposes by the Corporation as well as the lab. Approximately 5% of sample pulps are sent to secondary laboratories for check assays.

About the Garrison Project
The Garrison Project area is comprised of 214 mineral claims, 25 mining leases, and 87 patent claims encompassing approximately 8,000 hectares.  Both Garrcon and Jonpol have resource estimates that are described in a technical report prepared in accordance with NI 43-101, which was completed by a previous operator Northern Gold Mining Inc. (entitled “Technical Report on the Golden Bear Project – Garrison Property: Larder Lake Mining Division, Garrison Township, Ontario, Canada”) dated December 30, 2013, with an effective date of December 30, 2013 (the “Garrison Technical Report”). The Garrison Technical Report was prepared by A.C.A. Howe International Limited for Northern Gold Mining Inc. (a wholly-owned subsidiary of Osisko) and is available on Osiskos website at www.osiskomining.com and on SEDAR under Northern Gold Mining Inc.s issuer profile at www.sedar.com.

Resource estimates were conducted by A.C.A. Howe International Limited according to CIM standards. The Garrcon Zone estimates showed 15.1 million tonnes with an average grade of 1.07 g/t Au (521,000 oz) in measured resources; 14.1 million tonnes averaging 1.16 g/t Au (526,000 oz) in indicated resources; and 1.7 million tonnes averaging 0.72 g/t Au (39,000 oz) in inferred resources. Potential underground resources of 5.1 million tonnes averaging 3.49 g/t Au (577,000 oz) in the inferred category were also outlined. Resources were reported at a cut-off grade of 0.4 g/t Au for open pit extraction and 1.5 g/t in a bulk underground mining scenario using a gold price of US$1,250/oz.

At the Jonpol Zone, resources were estimated as 0.87 million tonnes averaging 5.34 g/t Au (150,000 oz) in the indicated category; and 1.07 million tonnes averaging 5.56 g/t Au (192,000 oz) in inferred resources. Resources were reported at a cut-off grade of 3.0 g/t Au and assume an underground extraction scenario using a gold price of US$1,250/oz.

Readers are cautioned that inferred resources have a great amount of uncertainty as to their existence and as to whether they can be mined economically. It cannot be assumed that all or any part of the inferred resources will ever be upgraded to a higher category. Mineral resources are not mineral reserves and do not have demonstrated economic viability.

Garrcon Zone
The Garrcon Zone has a shallow plunge eastward along the footwall of the Destor-Porcupine Fault Zone with the bulk of the resource in the western, more densely drilled area. The zone is exposed at surface and has potential for open pit bulk mining at an estimated overall stripping ratio of 1.8:1. There is potential for additional underground resources below the pit and along the easterly plunge of the zone, which is open for further exploration down dip and along strike.

The Garrcon shaft was sunk in 1935 and 1936 by the Consolidated Mining and Smelting Co. of Canada (“Cominco”) and the Shaft and South Zones were tested for high grade gold mineralization. Cominco drove approximately 1,430 metres of drifts and cross cuts, mining underground veins. Diamond drilling by Cominco and Lac Minerals Ltd. in the mid-to-late 1980s identified broad sections of low grade mineralization. In 2006-2007, ValGold Resources Ltd. conducted additional drilling confirming these zones. From 2009-2013 Northern Gold Mining Inc. conducted 97,000 metres of diamond drilling which delineated the current resource.

In 2014, Northern Gold Mining Inc. was granted a trial mining permit allowing the extraction of up to 150,000 tonnes. Northern Gold Mining Inc. mined 73,534 dry tonnes which was processed at the nearby Holt mill facility recovering 3,516 oz at an average head grade of 1.55 g/t and recovery of 95.9%.

Jonpol Zone
Jonpol is situated in the Munro Fault Zone, a west striking splay off the north side of the Destor-Porcupine Fault. Hosted in a shear zone tens of metres wide in altered mafic volcanic rocks, the deposit consists of four high grade gold mineralized zones (JP, JD, RP and East) over a strike length of 1.7 kilometers. Gold mineralization is hosted in quartz carbonate veins, in mafic and ultramafic host rocks, and is associated with intense albite and/or sericite alteration and pyrite mineralization.

In 1997, a 49,087 tonne bulk sample was extracted from the central part of the JP zone by Hillsborough Resources Limited with an average grade of 6.7 g/t which produced 9,476 ounces Au. From 1985-2013, over 130,000 metres of drilling was completed on the property by previous operators. Development work on the JP zone included the sinking of a 184 metre shaft as well as development of a ramp to the 150 metres level with mining on six sublevels. The Jonpol infrastructure underwent reclamation in the late 1990s and was closed out in 2001, but the existing ramp and shaft are preserved.

903 Zone
This third mineralized zone present at Garrison was not included in the resource estimate reported by the previous operator in 2013. Mineralization at the 903 was discovered in 1945 by Wright-Hargreaves Mines Ltd. In 1988 Lac Minerals acquired the claims covering the current 903 Zone and completed 17 drill holes totaling 4,823 metres. The property was optioned in 1990 to Jonpol and T&H Resources and subsequently returned to Lac Minerals in 1991. Northern Gold acquired the claims from a subsidiary of Barrick Gold in 2013, conducting surface exploration and six drill holes.

About Osisko Mining Inc.
Osisko is a mineral exploration company focused on the acquisition, exploration, and development of precious metal resource properties in Canada. Osisko holds a 100% in the high-grade Windfall Lake gold deposit located between Val-dOr and Chibougamau in Québec and holds a 100% undivided interest in a large area of claims in the surrounding Urban Barry area, a 100% interest in the Marban project located in the heart of Québecs prolific Abitibi gold mining district, and properties in the Larder Lake Mining Division in northeast Ontario, including the Garrcon, Jonpol and 903 zones on the Garrison property. Osisko continues to be well financed and has approximately $190 million in cash and equity investment.

Cautionary Note Regarding Forward-Looking Information
This news release contains “forward-looking information” within the meaning of the applicable Canadian securities legislation that is based on expectations, estimates, projections and interpretations as at the date of this news release. The information in this news release about the ongoing drill program at the Garrison gold project; results of the current drill program; the significance of new drill results reported in this press release; the ability of new drill results to demonstrate potential for expansion of the previously defined Garrcon, Jonpol and 903 mineralized zones at the Garrison project; the scope of the 2017 drill program; that the 2017 drill program will follow new extensions of these mineralized zones to further define the scale of mineralization at the Garrison project; potential mineralization; the ability to realize upon any mineralization in a manner that is economic; the ability to complete any proposed exploration activities and the results of such activities; the continuity or extension of any mineralization; and any other information herein that is not a historical fact may be “forward-looking information”. Any statement that involves discussions with respect to predictions, expectations, interpretations, beliefs, plans, projections, objectives, assumptions, future events or performance (often but not always using phrases such as “expects”, or “does not expect”, “is expected”, “interpreted”, “managements view”, “anticipates” or “does not anticipate”,  “plans”, “budget”, “scheduled”, “forecasts”, “estimates”, “believes” or “intends” or variations of such words and phrases or stating that certain actions, events or results “may” or “could”, “would”, “might” or “will” be taken to occur or be achieved) are not statements of historical fact and may be forward-looking information and are intended to identify forward-looking information. This forward-looking information is based on reasonable assumptions and estimates of management of the Corporation, at the time it was made, involves known and unknown risks, uncertainties and other factors which may cause the actual results, performance or achievements of Osisko to be materially different from any future results, performance or achievements expressed or implied by such forward-looking information. Such factors include, among others, risks relating to the ability of exploration activities (including drill results) to accurately predict mineralization; errors in managements geological modelling; the ability of Osisko to complete further exploration activities, including drilling; property interests; the ability of the Corporation to obtain required approvals and complete transactions on terms announced; the results of exploration activities; risks relating to mining activities; the global economic climate; metal prices; dilution; environmental risks; and community and non-governmental actions. Although the forward-looking information contained in this news release is based upon what management believes, or believed at the time, to be reasonable assumptions, Osisko cannot assure shareholders and prospective purchasers of securities of the Corporation that actual results will be consistent with such forward-looking information, as there may be other factors that cause results not to be as anticipated, estimated or intended, and neither Osisko nor any other person assumes responsibility for the accuracy and completeness of any such forward-looking information. Osisko does not undertake, and assumes no obligation, to update or revise any such forward-looking statements or forward-looking information contained herein to reflect new events or circumstances, except as may be required by law.

For further information please contact:
John Burzynski, President and Chief Executive Officer
Telephone: (416) 363-8653

Osisko Intersects 56.1 g/t Au Over 8.9 Metres At Windfall

New Bobcat Zone Returns 42.4 g/t Au over 3.3 Metres Near Surface

(Toronto, January 25, 2018)  Osisko Mining Inc. (OSK:TSX. “Osisko” or the “Corporation”) is pleased to provide new results from the ongoing drill program at its 100% owned Windfall Lake gold project located in the Abitibi greenstone belt, Urban Township, Eeyou Istchee James Bay, Québec. The 800,000 metre drill program combines definition, expansion and exploration drilling in and around the main Windfall gold deposit and the adjacent Lynx deposit (located immediately NE of Windfall).

Significant new analytical results from 72 intercepts in 39 drill holes and 6 wedges focused on infill and expansion drilling in the Main Windfall lake deposit are presented below.

  • New “Bobcat Zone” with high-grades discovered near surface and at shallow depths
  • Continued high-grade infill and expansion from Underdog
  • New hit from Drake

Highlights from the new results include: 56.1 g/t Au over 8.9 metres in OSK-W-17-1336-W1; 218 g/t Au over 2.1 metres in OSK-W-17-1191; 160 g/t over 2.0 metres in OSK-W-17-1142-W1; 106 g/t Au over 3.0 metres in OSK-W-17-1305; 30.8 g/t over 9.9 metres in OSK-OBM-16-693; 83.5 g/t Au over 3.4 metres in OSK-W-17-780-W1; 128 g/t Au over 2.1 metres in OSK-W-17-1203; 58.8 g/t Au over 2.5 metres in OSK-W-17-1095; 72.8 g/t Au over 2.0 metres in OSK-W-17-1020; 42.4 g/t Au over 3.3 metres in OSK-W-17-1138;  52.8 g/t Au over 2.3 metres in OSK-W-17-1381; 26.2 g/t Au over 3.8 metres in OSK-W-17-1374;  41.9 g/t Au over 2.0 metres in OSK-W-17-1289; 14.1 g/t Au over 5.6 metres in OSK-W-17-1255; and 26.5 g/t Au over 2.1 metres in OSK-W-17-1142. Maps showing hole locations and full analytical results are available at www.osiskomining.com.

Hole Number From (m) To (m) Interval (m) Au (g/t) uncut Au (g/t)
cut to
100 g/t
Zone Corridor
OSK-OBM-16-630 518.2 521.0 2.8 4.82   FW3U HW Underdog
OSK-OBM-16-693 654.1 664.0 9.9 30.8 22.2 FW3U HW Underdog
including 654.1 656.0 1.9 80.0 45.5
including 658.1 661.9 3.8 37.4 32.1
OSK-W-16-747 936.9 939.3 2.4 6.96   FW3 Underdog
including 938.1 938.6 0.5 32.5  
OSK-W-17-780-W1 1343.8 1347.2 3.4 83.5 29.4 FW3 HW Underdog
including 1346.6 1347.2 0.6 407 100
OSK-W-17-936-W1 776.0 778.0 2.0 3.65   Z27 Zone 27
including 777.2 778.0 0.8 8.07  
  785.0 787.7 2.7 4.03   Z27 Zone 27
including 787.0 787.7 0.7 7.71  
OSK-W-17-936-W2 671.1 673.3 2.2 11.1   Wolf HW Wolf
OSK-W-17-968 102.0 109.4 7.4 4.02   Z27 Zone 27
including 107.4 109.4 2.0 7.77  
  118.0 122.3 4.3 11.2 10.5 QTV Zone 27
including 122.0 122.3 0.3 109 100
OSK-W-17-989-W2 664.6 667.0 2.4 4.56   Wolf Wolf
OSK-W-17-1020 271.5 273.5 2.0 72.8   Bobcat Bobcat
including 272.0 273.5 1.5 96.9  
OSK-W-17-1095 88.2 90.7 2.5 58.8 52.9 Z27 Zone 27
including 88.6 89.7 1.1 114 100
OSK-W-17-1125 427.0 429.0 2.0 6.80   Vein Caribou
including 427.0 428.0 1.0 13.5  
  616.0 618.0 2.0 3.87   SHR Caribou
including 617.2 618.0 0.8 9.35  
OSK-W-17-1138 11.0 14.3 3.3 42.4   Bobcat Bobcat
including 13.0 14.3 1.3 98.1  
  21.0 24.0 3.0 3.28   Bobcat Bobcat
OSK-W-17-1139 148.0 150.2 2.2 4.29   Vein  
  157.5 160.1 2.6 4.53   Vein  
including 159.5 160.1 0.6 9.21  
OSK-W-17-1140 781.2 783.3 2.1 7.07   Caribou Ext. Caribou
including 783.0 783.3 0.3 48.8  
OSK-W-17-1142 13.1 15.2 2.1 26.5   CW4 Caribou
including 14.0 14.6 0.6 84.5  
OSK-W-17-1142-W1 370.0 372.0 2.0 160   Vein  Drake 
including 370.5 371.5 1.0 320  
OSK-W-17-1178 78.0 80.1 2.1 5.89   Bobcat Bobcat
including 79.5 80.1 0.6 17.5  
OSK-W-17-1191 235.4 237.5 2.1 218 34.6 Z27 FW Zone 27
including 236.8 237.5 0.7 650 100
OSK-W-17-1203 27.9 30.0 2.1 128 42.9 Z27 Zone 27
including 27.9 28.8 0.9 298 100
OSK-W-17-1218 27.0 29.0 2.0 3.99   VNCR Bobcat
  189.0 191.5 2.5 4.46   Bobcat Bobcat
OSK-W-17-1251 24.0 27.0 3.0 8.89   Bobcat Bobcat
including 24.0 25.0 1.0 21.0  
  55.0 59.0 4.0 3.86   Bobcat Bobcat
including 55.0 56.0 1.0 12.3  
  192.0 195.0 3.0 4.11   VNCR Bobcat
including 193.4 193.7 0.3 40.2  
OSK-W-17-1255 156.0 161.6 5.6 14.1   Bobcat Bobcat
including 156.6 159.5 2.9 21.1  
OSK-W-17-1273 54.9 57.0 2.1 4.05   Z27 HW Zone 27
including 54.9 55.4 0.5 14.3  
OSK-W-17-1280 369.8 372.7 2.9 3.19   Caribou Ext. Caribou
OSK-W-17-1288 749.0 751.0 2.0 4.41   Caribou Ext. Caribou
OSK-W-17-1289 343.0 345.0 2.0 41.9   QTV Mallard
including 343.0 344.0 1.0 83.5  
OSK-W-17-1305 348.0 351.0 3.0 106 50.1 Vein Caribou
including 349.5 351.0 1.5 211 100
OSK-W-17-1309 218.1 220.2 2.1 5.64   Z27 FW Zone 27
including 218.1 218.8 0.7 16.5  
OSK-W-17-1313 425.1 427.3 2.2 5.46   Z27 FW Zone 27
including 425.9 426.7 0.8 14.2  
  443.0 445.5 2.5 3.50   Z27 FW Zone 27
  19.0 22.0 3.0 3.05   Vein Caribou
OSK-W-17-1317 45.0 47.5 2.5 4.31   Z27 HW Zone 27
  170.0 172.0 2.0 4.60   Z27 Zone 27
OSK-W-17-1336-W1 1064.1 1073.0 8.9 56.1 15.1 FW2 Underdog
including 1067.0 1070.1 3.1 151 33.7
OSK-W-17-1371 604.6 607.0 2.4 3.61   Caribou Ext. Caribou
OSK-W-17-1374 312.6 315.0 2.4 4.27   Z27 HW Zone 27
  324.5 328.3 3.8 26.2   Z27 HW Zone 27
  721.0 723.7 2.7 3.09   FW3 Underdog
including 723.0 723.7 0.7 10.5  
OSK-W-17-1378 382.0 384.0 2.0 4.21   CS3 Caribou
  477.2 479.3 2.1 5.49   Wolf Wolf
OSK-W-17-1381 111.5 113.8 2.3 16.7   Bobcat Bobcat
including 112.5 112.9 0.4 94.6  
  653.0 655.3 2.3 52.8 13.2 Vein Zone 27
including 654.2 654.5 0.3 404 100
OSK-W-17-1383 29.5 34.2 4.7 13.1   Bobcat Bobcat
  83.0 87.0 4.0 4.01   Bobcat Bobcat
  94.9 97.0 2.1 5.01   Bobcat Bobcat
  102.0 104.1 2.1 5.33   Bobcat Bobcat 
including 103.1 104.1 1.0 10.5  
OSK-W-17-1385 734.7 737.2 2.5 8.40   Caribou Ext. Caribou
including 735.9 736.6 0.7 28.6  
  741.6 745.3 3.7 5.04   Caribou Ext. Caribou
including 744.3 745.3 1.0 13.0  
  820.5 824.0 3.5 6.64   Caribou Ext. Caribou
including 820.5 821.1 0.6 26.2  
OSK-W-17-1388 368.6 371.0 2.4 11.9   CS1 Caribou
  697.0 699.2 2.2 4.59   Wolf FW Wolf
OSK-W-17-1390 505.0 507.2 2.2 3.44   FW3 Underdog
OSK-W-17-1391 297.0 299.9 2.9 12.2   Bobcat Bobcat
including 299.4 299.9 0.5 65.4  
OSK-W-17-1393 157.0 159.0 2.0 3.91   Bobcat Bobcat
including 158.3 158.7 0.4 16.7  
OSK-W-17-1399 574.0 576.0 2.0 3.55   Caribou Ext. Caribou
OSK-W-17-1400 325.6 328.0 2.4 4.05   Caribou corridor Caribou
OSK-W-17-1404 141.4 144.0 2.6 4.28   Bobcat Bobcat
including 142.0 143.0 1.0 11.0  
  168.0 171.0 3.0 4.54   Bobcat Bobcat
including 170.7 171.0 0.3 13.4  
  535.0 537.0 2.0 3.96   Caribou Ext. Caribou
  539.7 543.0 3.3 4.33   Caribou Ext. Caribou
  356.8 359.5 2.7 10.4   Caribou Ext. Caribou
including 358.6 359.0 0.4 53.2  
OSK-W-17-1406 79.3 81.8 2.5 6.97   VNCR Bobcat
including 79.7 80.0 0.3 47.7  
  248.5 250.9 2.4 3.47   Bobcat Bobcat
  322.0 324.5 2.5 5.71   Bobcat Bobcat

Notes:

  1. True widths are estimated at 65 – 80% of the reported core length interval.  See “Quality Control” below.
  2. Definitions: HW = Hanging Wall, FW = footwall, VNCR = Crustiform Vein, TBD = To be determined, Ext = extension.
Hole Number Azimuth (°) Dip (°) Length (m) UTM E UTM N Section
OSK-OBM-16-630 329 -51 699 452252 5434614 2375
OSK-OBM-16-693 331 -54 861 452443 5434600 2525
OSK-W-16-747 331 -57 1050 452449 5434488 2475
OSK-W-17-780-W1 331 -60 1533 452929 5434374 2850
OSK-W-17-936-W1 332 -56 808 452773 5434547 2775
OSK-W-17-936-W2 332 -56 819 452773 5434547 2775
OSK-W-17-968 152 -51 201 451948 5434759 2175
OSK-W-17-989-W2 335 -56 743 452660 5434497 2675
OSK-W-17-1020 337 -54 312 453217 5434928 3350
OSK-W-17-1095 147 -50 147 451959 5434734 2175
OSK-W-17-1125 331 -58 975 452563 5434568 2625
OSK-W-17-1138 327 -51 402 452888 5434989 3100
OSK-W-17-1139 333 -56 1092 452473 5434470 2500
OSK-W-17-1140 336 -55 975 453006 5434522 2975
OSK-W-17-1142 324 -45 680 452202 5434628 2325
OSK-W-17-1142-W1 324 -45 699 452202 5434628 2325
OSK-W-17-1178 330 -63 411 452917 5435014 3150
OSK-W-17-1191 315 -69 255 452067 5434617 2200
OSK-W-17-1203 333 -53 372 452275 5434867 2500
OSK-W-17-1218 327 -62 405 453004 5435009 3225
OSK-W-17-1251 326 -60 372 452889 5434989 3100
OSK-W-17-1255 130 -65 276 452947 5435107 3225
OSK-W-17-1273 338 -66 225 452081 5434634 2225
OSK-W-17-1280 335 -57 467 452857 5434931 3050
OSK-W-17-1288 331 -56 912 452945 5434561 2950
OSK-W-17-1289 339 -61 375 452277 5434866 2500
OSK-W-17-1305 330 -54 888 452499 5434592 2575
OSK-W-17-1309 330 -69 237 452073 5434610 2200
OSK-W-17-1313 331 -51 876 452279 5434573 2375
OSK-W-17-1317 327 -65 274 452072 5434611 2200
OSK-W-17-1336-W1 335 -61 1335 452616 5434449 2600
OSK-W-17-1371 334 -69 981 453100 5434875 3225
OSK-W-17-1374 317 -59 873 452273 5434579 2375
OSK-W-17-1378 331 -56 741 452688 5434638 2750
OSK-W-17-1381 329 -63 723 453018 5434935 3200
OSK-W-17-1383 331 -63 597 452767 5434864 2925
OSK-W-17-1385 319 -49 906 453379 5434741 3400
OSK-W-17-1388 332 -57 762 452716 5434605 2775
OSK-W-17-1390 329 -47 657 451911 5434437 1975
OSK-W-17-1391 327 -62 663 452981 5434900 3150
OSK-W-17-1393 332 -62 573 452725 5434862 2900
OSK-W-17-1399 332 -61 1053 453411 5434870 3500
OSK-W-17-1400 332 -52 769 452310 5434408 2325
OSK-W-17-1404 335 -67 635 452854 5434823 3000
OSK-W-17-1406 334 -60 579 452911 5434879 3075

 

OSK-OBM-16-693 intersected 30.8 g/t Au over 9.9 metres in the Underdog Corridor. Mineralization is composed of up to 10% pyrite-silica flooding, up to 5% pyrite stringers, 3% disseminated pyrite, and local visible gold. The host rhyolite, in contact with a porphyritic felsic dike, is strongly silica and sericite altered.

OSK-W-17-780-W1 intersected 83.5 g/t Au over 3.4 metres in FW3 HW. Mineralization is composed of 4% pyrite stringers and smoky quartz veins within a strongly silica altered porphyritic felsic dike.

OSK-W-17-1020 intersected 72.8 g/t Au over 2.0 meters in the new Bobcat Zone. This zone is NE along strike and on top of the Caribou corridor. The two zones have parallel plunges to the North-East. Mineralization is composed of 1% disseminated pyrite and 2% of pyrite-silica flooding within a strongly sericitized rhyolite.

OSK-W-17-1095 intersected 58.8 g/t Au over 2.5 metres in Zone 27. Mineralization is composed of up to 5% pyrite with low angle silica flooding hosted in a strongly silicified and fuchsitized andesite.

OSK-W-17-1138 intersected 42.4 g/t Au over 3.3 metres in Bobcat. Mineralization is very near surface (starting 11 metres downhole) and is composed of 3% silica flooding, 1% disseminated pyrite and crustiform vein within a sericitized rhyolite.

OSK-W-17-1139 intersected two veins in a sheared andesite south of the main zone. Mineralization, 4.29 g/t Au over 2.2 metres and 4.53 g/t au over 2.6 metres, is composed of up to 4% disseminated pyrite within a chloritized andesite.

OSK-W-17-1142-W1 intersected 160 g/t Au over 2.0 metres providing a new hit for Drake. Mineralization is composed of up to 10% pyrite, local visible gold and electrum associated in quartz-carbonate veins. The bleached andesite is near the Red Dog contact.

OSK-W-17-1191 intersected 218 g/t Au over 2.1 metres in Zone 27. Mineralization is composed of 5% pyrite stringers and 3% pyrite fragments within a strongly sericitized and silicified andesite.

OSK-W-17-1203 intersected 128 g/t Au over 2.1 metres in Zone 27. Mineralization is composed of up to 20% pyrite, pyrite silica flooding and local visible gold within a strongly silicified rhyolite.

OSK-W-17-1251 intersected 8.89 g/t Au over 3.0 metres, 3.86 g/t Au over 4.0 metres and 4.11 g/t Au over 3.0 metres in Bobcat. The first interval is composed of up to 7% pyrite-silica flooding and 1% ptygmatic tourmaline veins within a strongly sericitized and silicified felsic porphyritic dike. The second interval is within a sericitized rhyolite and composed of up to 5% pyrite stringers and disseminated pyrite. The third interval is within a quartz crustiform vein.

OSK-W-17-1255 intersected 14.1 g/t Au over 5.6 metres in Bobcat. Mineralization is composed of up to 10% pyrite within a pyrite-silica flooding running at low core angle. The hosting gabbro is strongly altered in silica and sericite.

OSK-W-17-1289 intersected 41.9 g/t Au over 2.0 meters in Mallard. Mineralization is composed of 1% disseminated pyrite in quartz-tourmaline veins within a chloritized andesite.

OSK-W-17-1305 intersected 106 g/t Au over 3.0 metres in Caribou Corridor. Mineralization is composed of disseminated pyrite within quartz-carbonate veins hosted in a sericitized andesite.

OSK-W-17-1336-W1 intersected 56.1 g/t Au over 8.9 metres in Underdog Corridor. Mineralization is composed of local visible gold with up to 8% pyrite stringers, disseminated chalcopyrite and quartz-tourmaline veins within a silicified porphyritic felsic dike.

OSK-W-17-1381 intersected 16.7 g/t Au over 2.3 metres in Bobcat and 52.8 g/t Au over 2.3 metres in Zone 27. The first interval is composed of 2% pyrite stringers, 3% pyrite fragments and a 10 centimetres quartz-carbonate vein within a sericitized and silicified rhyolite. The second interval, is composed of 4% disseminated pyrite and local visible gold within a quartz-cabonate vein hosted in a chloritized andesite.

OSK-W-17-1383 intersected four intervals in Bobcat: 13.1 g/t Au over 4.7 metres, 4.01 g/t Au over 4.0 metres, 5.01 g/t Au over 2.1 metres and 5.33 g/t Au over 2.1 metres. Mineralization is composed of up to 5% pyrite stringers, 1% pyrite tourmaline stringers and up to 1% disseminated pyrite. The first interval is in a porphyritic felsic dike and the three others are in crustiform veins within a silicified rhyolite.

Zone 27 results also include 12 intercepts from 7 drill holes and one wedge. Mineralization is composed of up to 15% pyrite, disseminated or in stringers associated with quartz-tourmaline veins. Host rocks are rhyolites, andesites and felsic dikes.

Caribou results also include 18 intercepts from 12 drill holes. Mineralization is composed of up to 20% pyrite, usually in stringers, locally semi-massive, and quartz-tourmaline veins hosted in altered porphyritic felsic dikes, andesites and rhyolites.

Wolf results include 4 intercepts from 2 drill holes and 2 wedges. Mineralization is composed of up to 70% pyrite-silica flooding, up to 20% pyrite stringers, and ptygmatic tourmaline veins hosted in silicified, sericitized and fuchsitized andesite.

Underdog results also include 4 intercepts from 4 drill holes. Mineralization is composed of up to 20% pyrite, usually in stringers associated with trace quartz-tourmaline veins and hosted in porphyritic felsic dikes. Host dikes are strongly silica altered.

Bobcat results also include 11 intercepts from 7 drill holes. Mineralization is composed of up to 10% pyrite-silica flooding, up to 5% disseminated pyrite and crustiform quartz veins within chloritized, sericitized andesites, rhyolites and felsic dikes.

Qualified Person
The scientific and technical content of this news release has been reviewed, prepared and approved by Mr. Louis Grenier, M.Sc.A., P.Geo. (OGQ 800), Project Manager of the Windfall Lake gold project, who is a “Qualified Person” as defined by National Instrument 43-101 – Standards of Disclosure for Mineral Projects (“NI 43-101”).

Quality Control and Reporting Protocols
True widths determinations are estimated at 65-80% of the reported core length intervals for most of the zones. Assays are uncut except where indicated. Intercepts occur within geological confines of major zones but have not been correlated to individual vein domains at this time. Reported intervals include minimum weighted averages of 3.0 g/t Au diluted over core lengths of at least 2.0 metres. All NQ core assays reported were obtained by either 1-kilogram screen fire assay or standard 50-gram fire-assaying-AA finish or gravimetric finish at ALS Laboratories in Val dOr, Québec, Thunder Bay and Sudbury, Ontario or Vancouver, British Colombia or Bureau Veritas in Timmins, Ontario. The 1-kilogram screen assay method is selected by the geologist when samples contain coarse gold or present a higher percentage of pyrite than surrounding intervals. Selected samples are also analyzed for multi-elements, including silver, using an Aqua Regia-ICP-AES method at ALS Laboratories. Drill program design, Quality Assurance/Quality Control (“QA/QC”) and interpretation of results is performed by qualified persons employing a QA/QC program consistent with NI 43-101 and industry best practices. Standards and blanks are included with every 20 samples for QA/QC purposes by the Corporation as well as the lab. Approximately 5% of sample pulps are sent to secondary laboratories for check assay.

About the Windfall Lake Gold Deposit
The Windfall Lake gold deposit is located between Val-dOr and Chibougamau in the Abitibi region of Québec, Canada. The mineral resource defined by the previous operator comprises 2,762,000 tonnes at 8.42 g/t Au (748.000 ounces) in the indicated category and 3,512,000 tonnes at 7.62 g/t Au (860,000 ounces) in the inferred category (sourced from a technical report dated June 10, 2015 entitled “Preliminary Economic Assessment of the Windfall Lake Gold Property, Québec, Canada” with an effective date of April 28, 2015, prepared in accordance with NI 43-101). The Windfall Lake gold deposit is currently one of the highest grade resource-stage gold projects in Canada. The bulk of the mineralization occurs in the Main Zone, a southwest/northeast trending zone of stacked mineralized lenses, measuring approximately 600 metres wide and at least 1.400 metres long. The deposit is well defined from surface to a depth of 500 metres, and remains open along strike and at depth. Mineralization has been identified only 30 metres from surface in some areas and as deep as 870 metres in others, with significant potential to extend mineralization up and down-plunge and at depth.

About Osisko Mining Inc.
Osisko is a mineral exploration company focused on the acquisition, exploration, and development of precious metal resource properties in Canada. Osisko holds a 100% in the high-grade Windfall Lake gold deposit located between Val-dOr and Chibougamau in Québec and holds a 100% undivided interest in a large area of claims in the surrounding Urban Barry area and nearby Quevillon area (over 3,300 square kilometres), a 100% interest in the Marban project located in the heart of Québecs prolific Abitibi gold mining district, and properties in the Larder Lake Mining Division in northeast Ontario, including the Jonpol and Garrcon deposits on the Garrison property, the Buffonta past producing mine and the Gold Pike mine property. The Corporation also holds interests and options in a number of additional properties in northern Quebec and Ontario.  Osisko continues to be well financed with approximately $190 million in cash and investments.

Cautionary Note Regarding Forward-Looking Information
This news release contains “forward-looking information” within the meaning of the applicable Canadian securities legislation that is based on expectations, estimates, projections and interpretations as at the date of this news rele

Osisko Intersects 415 g/t Au Over 5.9 Metres At Lynx

High-Grade Core Developing at Lynx 4

(Toronto, January 23, 2018)  Osisko Mining Inc. (OSK:TSX. “Osisko” or the “Corporation”) is pleased to provide new results from the ongoing drill program at its 100% owned Windfall Lake gold project located in the Abitibi greenstone belt, Urban Township, Eeyou Istchee James Bay, Québec. The 800,000 metre drill program combines definition, expansion and exploration drilling in and around the main Windfall gold deposit and the adjacent Lynx deposit (located immediately NE of Windfall).

Significant new analytical results from 23 intercepts in 17 drill holes focused on infill and expansion drilling in the Lynx deposit are presented below. Osisko continues to extend the known Lynx zones of mineralization through the application of the Windfall geological model and as the density of drilling increases.  The new results appear to demonstrate that the Lynx 4 Zone is developing a high-grade core similar to the Lynx 1 discovery zone.

  • New infill drillholes are delineating a high-grade zone in Lynx 4 between sections 3925E and 4225E
  • Lynx 4 demonstrates good continuity along 1350 metres strike between sections 2875E and 4225E.
  • New drilling shows the potential extension of Lynx 6 by 725 metres to the south-west.

Highlights from the new results include: 415 g/t Au over 5.9 metres and 19.9 g/t Au over 8.8 metres in OSK-W-17-1166-W1; 43.7 g/t Au over 4.8 metres in OSK-W-17-1128; 25.1 g/t Au over 4.5 metres in OSK-W-17-1386; 46.3 g/t Au over 2.4 metres in OSK-W-17-909-W4; 26.1 g/t Au over 4.2 metres in OSK-17-W-1156; 42.1 g/t Au over 2.0 metres in OSK-W-17-931;  17.4 g/t Au over 4.8 metres in OSK-W-17-1166-W4;  11.8 g/t Au over 5.5 metres in OSK-W-17-958; and 23.4 g/t Au over 2.0 metres in OSK-W-17-1397. Maps showing hole locations and full analytical results are available at www.osiskomining.com.

Hole Number From
(m)
To
(m)
Interval
(m)
Au (g/t)
uncut
Au (g/t)
cut to
100 g/t
Zone Corridor
OSK-W-17-909-W4 950.0 952.5 2.5 8.96   Lynx 4 Lynx
including 950.5 951.0 0.5 37.2  
  1049.6 1052.0 2.4 46.3   Lynx 4 Lynx
OSK-W-17-931 683.0 685.0 2.0 42.1 22.4 Lynx 4 Lynx
including 683.0 683.4 0.4 199 100
OSK-W-17-958 1053.0 1058.5 5.5 11.8   Lynx 4 Lynx
including 1054.0 1054.3 0.3 68.7  
including 1057.9 1058.5 0.6 53.5  
OSK-W-17-1054 86.0 88.0 2.0 12.9   Lynx 1 Lynx
including 86.4 87.0 0.6 42.6  
OSK-W-17-1117 86.9 89.0 2.1 4.76   Lynx 2 Lynx
including 86.9 87.5 0.6 16  
OSK-W-17-1128 466.2 471.0 4.8 43.7 22.7 Lynx 2 Lynx
including 470.2 471.0 0.8 226 100
OSK-W-17-1156 520.8 525.0 4.2 26.1 25.0 Lynx HW Lynx
including 521.1 522.2 1.1 92.2 88.2
OSK-W-17-1166-W1 997.7 1006.5 8.8 19.9 12.5 Lynx 4 Lynx
including 1005.4 1005.7 0.3 317 100
  1012.0 1014.1 2.1 15.0   Lynx 4 Lynx
including 1013.5 1014.1 0.6 49.6  
  1027.0 1032.9 5.9 415 69.6 Lynx 4 Lynx
Including 1027.0 1027.8 0.8 68.8  
Including 1028.4 1029.3 0.9 1870 100
Including 1029.3 1030.3 1.0 126 100
Including 1031.3 1032.0 0.7 271 100
Including 1032.0 1032.9 0.9 431 100
OSK-W-17-1166-W4 1079.7 1084.5 4.8 17.4   Lynx 4 Lynx
including 1081.0 1081.5 0.5 58.4  
including 1084.0 1084.5 0.5 52.0  
OSK-W-17-1190 998.0 1000.0 2.0 13.6   Lynx 6 Lynx
OSK-W-17-1199 172.1 174.1 2.0 3.68   Lynx 3 Lynx
OSK-W-17-1242-W1 607.0 609.0 2.0 9.36   Lynx HW Lynx
including 608.2 609.0 0.8 21.9  
OSK-W-17-1265 415.8 418.5 2.7 3.19   Lynx 4 Lynx
OSK-W-17-1343-W2 864.8 867.0 2.2 5.79   Lynx 4 Lynx
  879.0 881.0 2.0 14.2   Lynx 4 Lynx
including 879.4 879.7 0.3 69.6  
  1197.9 1200.0 2.1 7.84   Lynx 6 Lynx
including 1197.9 1198.2 0.3 54.3  
OSK-W-17-1386 747.5 750.0 2.5 18.1   Lynx 1 Lynx
including 747.5 748.4 0.9 49.3  
  771.3 775.8 4.5 25.1 15.1 Lynx 1 Lynx
including 771.3 772.3 1.0 104 58.8
OSK-W-17-1397 213.0 215.0 2.0 23.4 21.6 Lynx 2 Lynx
including 214.1 214.4 0.3 112 100
OSK-W-17-1399 353.8 359.0 5.2 6.11   VNCR Lynx
including 353.8 354.4 0.6 17.0  
including 358.0 359.0 1.0 20.2  

Notes:

  1. True widths are estimated at 65 – 80% of the reported core length interval.  See “Quality Control” below.
  2. Definitions: HW = Hanging Wall, VNCR = Crustiform Vein.
Hole Number Azimuth (°) Dip (°) Length (m) UTM E UTM N Section
OSK-W-17-909-W4 131 -55 1134 453683 5435677 4125
OSK-W-17-931 134 -50 936 453360 5435437 3725
OSK-W-17-958 143 -55 1212 453359 5435439 3725
OSK-W-17-1054 325 -48 363 453282 5435000 3450
OSK-W-17-1117 334 -46 471 453120 5434934 3275
OSK-W-17-1128 129 -53 1419 453272 5435392 3625
OSK-W-17-1156 136 -49 663 453437 5435484 3825
OSK-W-17-1166-W1 132 -59 1516 453621 5435639 4050
OSK-W-17-1166-W4 132 -59 1236 453621 5435639 4050
OSK-W-17-1190 151 -49 1179 452905 5435152 3200
OSK-W-17-1199 333 -53 672 453416 5435073 3600
OSK-W-17-1242-W1 144 -58 1008 453570 5435490 3950
OSK-W-17-1265 334 -53 1074 453083 5434542 3050
OSK-W-17-1343-W2 137 -56 1323 453570 5435490 3950
OSK-W-17-1386 136 -54 998 453800 5435749 4275
OSK-W-17-1397 333 -61 732 453300 5434964 3450
OSK-W-17-1399 332 -61 1053 453411 5434870 3500

OSK-W-17-909-W4 intersected two intervals in Lynx 4: 8.96 g/t Au over 2.5 metres and 46.3 g/t Au over 2.4 metres. The first interval is composed of up to 10% irregular pyrite stringers at a sericitized contact between a gabbro and a rhyolite. The second interval is composed of 3% interstitial pyrite in silica flooding within strongly sericitized andesite.

OSK-W-17-931 intersected 42.1 g/t Au over 2.0 metres in Lynx 4. Mineralization is composed of 5% disseminated pyrite, 2% pyrite-tourmaline stringers and trace of pyrite-silica flooding within a strongly sericitized rhyolite.

OSK-W-17-958 intersected 11.8 g/t Au over 5.5 metres in Lynx 4. Mineralization is composed of 5% disseminated pyrite, and 2% pyrite-sphalerite stringers. Two low angle smoky quartz veins have local visible gold. The host rhyolite is strongly silicified and sericitized.

OSK-W-17-1054 intersected 12.9 g/t Au over 2.0 metres in Lynx 1. Mineralization is composed of 1% pyrite stringers within a chloritized shear zone.

OSK-W-17-1117 intersected 4.76 g/t Au over 2.1 metres in Lynx 2. Mineralization is composed of 8% pyrite-silica flooding and 1% pyrite stringers within a strongly silicified fragmental felsic dike.

OSK-W-17-1028 intersected 43.7 g/t Au over 4.8 metres in Lynx 2. Mineralization is composed of 2% pyrite stringers and local visible gold at the contact between a rhyolite and a gabbro. Silica, sericite and fuchsite alteration is pervasive in the rhyolite.

OSK-W-17-1156 intersected Lynx HW returning 26.1 g/t Au over 4.2 metres. Mineralization is composed of 5% pyrite stringers and 2% disseminated pyrite. Local visible gold, electrum and chalcopyrite are disseminated at the strongly silicified and fuchsitized contact between the gabbro and felsic intrusion.

OSK-W-17-1166-W1 intersected three intervals in Lynx 4: 19.9 g/t Au over 8.8 metres, 15.0 g/t Au over 2.1 metres and 415 g/t Au over 5.9 metres. The first interval is composed of 2% pyrite stringers and 1% ptygmatic tourmaline veins within a strongly silicified porphyritic felsic dike. Local visible gold is associated with pyrite-silica flooding. The second interval is composed of up to 4% pyrite silica flooding and 1% pyrite clusters within a strongly silicified, carbonatized and fuchsitized porphyric felsic dike. The last interval includes four high grade sub-intervals with up to 25% disseminated pyrite, up to 7% pyrite stringers and pyrite-tourmaline stringers. The mineralization is hosted in a strongly silicified rhyolite.

OSK-W-17-1166-W4 intersected 17.4 g/t Au over 4.8 metres in Lynx 4. Mineralization is composed of up to 7% disseminated pyrite. Local visible gold is within a low angle smoky quartz vein hosted in a strongly sericitized and silicified rhyolite. This interval extends Lynx 4 by 85 metres vertically under OSK-W-17-1166-W1 (this press release).

OSK-W-17-1190 intersected 13.6 g/t Au over 2.0 metres in Lynx 6. Mineralization is composed of 2% pyrite clusters and 1% pyrite stringers within a chloritized andesite. The interval is 725 metres up plunge and south-west of OSK-W-17-1343-W3 (this press release).

OSK-W-17-1199 intersected 3.68 g/t Au over 2.0 metres. Mineralization is composed of pyrite-silica flooding and quartz veins within a chloritized fragmental felsic dike.

OSK-W-17-1242-W1 intersected 9.36 g/t Au over 2.0 metres in Lynx HW. Mineralization is composed of 1% disseminated and clustered pyrite at the contact between a gabbro and a porphyritic felsic dike.

OSK-W-17-1265 intersected 3.19 g/t Au over 2.7 metres in Lynx 4. Mineralization is at the contact between a rhyolite and a felsic dike and composed of 1% pyrite stringers with strong sericite alteration.

OSK-W-17-1343-W2 intersected three intervals: 5.79 g/t Au over 2.2 metres and 14.2 g/t Au over 2.0 metres in Lynx 4 and 7.84 g/t Au over 2.1 metres in Lynx 6. The first interval is composed of up to 10% pyrite clusters and silica-carbonates-tourmaline veins within a moderately silicified and sericitized rhyolite. The second interval is composed of 10% pyrite-silica flooding within a strongly sericitized rhyolite. The last interval is composed of local visible gold, 3% disseminated pyrite and 2% pyrite clusters within a chloritized and silicified rhyolite. This interval extends Lynx 6 by 50 meters vertically under OSK-W-17-1128 (14.0 g/t Au over 2.3 metres previously reported October 12, 2017).

OSK-W-17-1386 intersected two intervals in Lynx 1: 18.1 g/t Au over 2.5 metres and 25.1 g/t Au over 4.5 metres. The first interval is composed of up to 3% pyrite clusters, 1% quartz-tourmaline veins and 1% disseminated pyrite. Mineralization is hosted in a sericitized and fuchsitized gabbro. The second interval is at the contact between a gabbro and a felsic dike. Mineralization is composed of 3% pyrite clusters, 3% pyrite-silica flooding and 1% pyrite stockwork.

OSK-W-17-1397 intersected Lynx 2 returning 23.4 g/t Au over 2.0 metres. Mineralization is composed of up to 10% pyrite-silica flooding, 2% disseminated pyrite and local visible gold within a fuchsite and sericite altered rhyolite.

OSK-W-17-1399 intersected 6.11 g/t Au over 5.2 metres in Lynx 1. Mineralization is composed of up to 10% pyrite stringers and 5% pyrite clusters associated with 30% quartz crustiform veins injected in a weak fuchsite altered gabbro.

Qualified Person
The scientific and technical content of this news release has been reviewed, prepared and approved by Mr. Louis Grenier, M.Sc.A., P.Geo. (OGQ 800), Project Manager of the Windfall Lake gold project, who is a “Qualified Person” as defined by National Instrument 43-101 – Standards of Disclosure for Mineral Projects (“NI 43-101”).

Quality Control and Reporting Protocols
True widths determinations are estimated at 65-80% of the reported core length intervals for most of the zones. Assays are uncut except where indicated. Intercepts occur within geological confines of major zones but have not been correlated to individual vein domains at this time. Reported intervals include minimum weighted averages of 3.0 g/t Au diluted over core lengths of at least 2.0 metres. All NQ core assays reported were obtained by either 1-kilogram screen fire assay or standard 50-gram fire-assaying-AA finish or gravimetric finish at ALS Laboratories in Val dOr, Québec, Thunder Bay and Sudbury, Ontario or Vancouver, British Colombia or Bureau Veritas in Timmins, Ontario. The 1-kilogram screen assay method is selected by the geologist when samples contain coarse gold or present a higher percentage of pyrite than surrounding intervals. Selected samples are also analyzed for multi-elements, including silver, using an Aqua Regia-ICP-AES method at ALS Laboratories. Drill program design, Quality Assurance/Quality Control (“QA/QC”) and interpretation of results is performed by qualified persons employing a QA/QC program consistent with NI 43-101 and industry best practices. Standards and blanks are included with every 20 samples for QA/QC purposes by the Corporation as well as the lab. Approximately 5% of sample pulps are sent to secondary laboratories for check assay.

About the Windfall Lake Gold Deposit
The Windfall Lake gold deposit is located between Val-dOr and Chibougamau in the Abitibi region of Québec, Canada. The mineral resource defined by the previous operator comprises 2,762,000 tonnes at 8.42 g/t Au (748.000 ounces) in the indicated category and 3,512,000 tonnes at 7.62 g/t Au (860,000 ounces) in the inferred category (sourced from a technical report dated June 10, 2015 entitled “Preliminary Economic Assessment of the Windfall Lake Gold Property, Québec, Canada” with an effective date of April 28, 2015, prepared in accordance with NI 43-101). The Windfall Lake gold deposit is currently one of the highest grade resource-stage gold projects in Canada. The bulk of the mineralization occurs in the Main Zone, a southwest/northeast trending zone of stacked mineralized lenses, measuring approximately 600 metres wide and at least 1.400 metres long. The deposit is well defined from surface to a depth of 500 metres, and remains open along strike and at depth. Mineralization has been identified only 30 metres from surface in some areas and as deep as 870 metres in others, with significant potential to extend mineralization up and down-plunge and at depth.

About Osisko Mining Inc.
Osisko is a mineral exploration company focused on the acquisition, exploration, and development of precious metal resource properties in Canada. Osisko holds a 100% in the high-grade Windfall Lake gold deposit located between Val-dOr and Chibougamau in Québec and holds a 100% undivided interest in a large area of claims in the surrounding Urban Barry area and nearby Quevillon area (over 3,300 square kilometres), a 100% interest in the Marban project located in the heart of Québecs prolific Abitibi gold mining district, and properties in the Larder Lake Mining Division in northeast Ontario, including the Jonpol and Garrcon deposits on the Garrison property, the Buffonta past producing mine and the Gold Pike mine property. The Corporation also holds interests and options in a number of additional properties in northern Quebec and Ontario.  Osisko continues to be well financed with approximately $190 million in cash and investments.

Cautionary Note Regarding Forward-Looking Information
This news release contains “forward-looking information” within the meaning of the applicable Canadian securities legislation that is based on expectations, estimates, projections and interpretations as at the date of this news release. The information in this news release about the Windfall Lake gold deposit being one of the highest grade resource-stage gold projects in Canada; the current 800,000 metre drill program; the significance of new results from the ongoing drill program at the Windfall Lake gold project; the significance of assay results presented in this press release; the high-grade core developing at Lynx 4; the type of drilling included in the drill program (definition drilling, expansion drilling to the NE of the main deposit and adjacent Lynx deposit, and exploration drilling on the greater deposit and Urban-Barry project area); potential mineralization; the potential to extend mineralization up and down-plunge and at depth at the Windfall Lake gold deposit; the ability to realize upon any mineralization in a manner that is economic; the ability to complete any proposed exploration activities and the results of such activities, including the continuity or extension of any mineralization; and any other information herein that is not a historical fact may be “forward-looking information”. Any statement that involves discussions with respect to predictions, expectations, interpretations, beliefs, plans, projections, objectives, assumptions, future events or performance (often but not always using phrases such as “expects”, or “does not expect”, “is expected”, “interpreted”, “managements view”, “anticipates” or “does not anticipate”, “plans”, “budget”, “scheduled”, “forecasts”, “estimates”, “believes” or “intends” or variations of such words and phrases or stating that certain actions, events or results “may” or “could”, “would”, “might” or “will” be taken to occur or be achieved) are not statements of historical fact and may be forward-looking information and are intended to identify forward-looking information. This forward-looking information is based on reasonable assumptions and estimates of management of the Corporation. at the time it was made, involves known and unknown risks, uncertainties and other factors which may cause the actual results, performance or achievements of Osisko to be materially different from any future results, performance or achievements expressed or implied by such forward-looking information. Such factors include, among others, risks relating to the ability of exploration activities (including drill results) to accurately predict mineralization; errors in managements geological modelling; the ability of Osisko to complete further exploration activities, including drilling; property interests in the Windfall Lake gold project; the ability of the Corporation to obtain required approvals and complete transactions on terms announced; the results of exploration activities; risks relating to mining activities; the global economic climate; metal prices; dilution; environmental risks; and community and non-governmental actions. Although the forward-looking information contained in this news release is based upon what management believes, or believed at the time, to be reasonable assumptions. Osisko cannot assure shareholders and prospective purchasers of securities of the Corporation that actual results will be consistent with such forward-looking information, as there may be other factors that cause results not to be as anticipated, estimated or intended, and neither Osisko nor any other person assumes responsibility for the accuracy and completeness of any such forward-looking information, Osisko does not undertake, and assumes no obligation, to update or revise any such forward-looking statements or forward-looking information contained herein to reflect new events or circumstances, except as may be required by law.

For further information please contact:
John Burzynski. President and Chief Executive Officer
Telephone: (416) 363-8653

Osisko Intersects 86.7 g/t Au Over 4.3 Metres At Windfall

Mineralization Continues to be Confirmed in Caribou Extension

(Toronto, January 18, 2018)  Osisko Mining Inc. (OSK:TSX. “Osisko” or the “Corporation”) is pleased to provide new results from the ongoing drill program at its 100% owned Windfall Lake gold project located in the Abitibi greenstone belt, Urban Township, Eeyou Istchee James Bay, Québec. The 800,000 metre drill program combines definition, expansion and exploration drilling in and around the main Windfall gold deposit and the adjacent Lynx deposit (located immediately NE of Windfall).

Significant new analytical results from 148 intercepts in 84 drill holes and 5 wedges focused on infill and expansion drilling in the Main Windfall lake deposit are presented below.

  • New Underdog Zone discovered to SW
  • New mineralization discovered between the Mallard Zone and Zone 27.
  • New mineralization discovered near surface west of the main deposit.

Highlights from the new results include: 86.7 g/t Au over 4.3 metres in OSK-W-17-1345; 74.0 g/t Au over 2.5 metres and 29.6 g/t Au over 2.9 metres in OSK-W-17-1334; 48.6 g/t over 2.0 metres in OSK-OBM-15-565; 32.7 g/t Au over 2.8 metres in OSK-W-17-1233; 41.5 g/t Au over 2.0 metres and 24.8 g/t Au over 2.4 metres in OSK-OBM-16-678; 10.0 g/t Au over 8.1 metres in OSK-W-17-1317; 11.1 g/t Au over 6.9 metres in OSK-W-17-1125-W1; 29.2 g/t Au over 2.2 metres in OSK-W-17-1273; 11.6 g/t Au over 5.4 metres in OSK-W-17-1308; 25.2 g/t Au over 2.0 metres in OSK-W-17-1313;  and 20.5 g/t Au over 2.3 metres in OSK-W-17-1225. Maps showing hole locations and full analytical results are available at www.osiskomining.com.

Hole Number From (m) To (m) Interval (m) Au (g/t) uncut Au (g/t)
cut to
100 g/t
Zone Corridor
OSK-OBM-15-565 393.0 395.0 2.0 48.6   TBD Zone 27 –  Mallard
including 394.0 395.0 1.0 96.9  
OSK-OBM-16-678 256.0 258.4 2.4 24.8   Z27 Zone 27
including 257.5 258.4 0.9 65.4  
  318.0 320.0 2.0 41.5   Z27 Zone 27
including 319.0 320.0 1.0 82.8  
OSK-W-17-937-W1 786.4 788.6 2.2 3.21   Wolf 2 Caribou
OSK-W-17-937-W2 749.0 751.5 2.5 16.8   Wolf 2 HW Caribou
  811.0 813.0 2.0 9.01   Wolf 2 Caribou
including 811.3 811.8 0.5 25.2  
OSK-W-17-978 492.2 495.0 2.8 3.04   Caribou Ext. Caribou
OSK-W-17-989-W2 506.0 509.0 3.0 6.29   CS1 Caribou
including 506.0 507.0 1.0 16.0  
OSK-W-17-1002 284.0 286.0 2.0 5.07   Z27 Zone 27
including 284.6 285.0 0.4 16.5  
OSK-W-17-1014 176.6 180.0 3.4 6.27   Z27 Zone 27
including 178.4 179.0 0.6 30.0  
OSK-W-17-1051 51.0 53.4 2.4 3.94   VNCR F17
OSK-W-17-1052 721.0 723.3 2.3 3.81   Z27 Zone 27
including 721.8 722.1 0.3 21.9  
OSK-W-17-1053 74.7 79.8 5.1 5.06   Z27 Zone 27
including 79.2 79.8 0.6 38.2  
OSK-W-17-1073 97.2 101.4 4.2 3.11   VNCR  
OSK-W-17-1077 59.0 61.0 2.0 8.41   Z27 Zone 27
including 59.4 60.0 0.6 18.0  
OSK-W-17-1125-W1 368.0 370.1 2.1 4.01   CS3 Caribou
  445.0 447.0 2.0 7.57   Caribou FW Caribou
including 445.0 446.0 1.0 15.1  
  475.0 481.9 6.9 11.1   Wolf HW Caribou
including 479.0 481.0 2.0 26.5  
OSK-W-17-1125-W3 420.0 422.0 2.0 18.1   Caribou Caribou
including 421.0 422.0 1.0 36.1  
  501.0 503.0 2.0 10.2   Wolf Caribou
including 502.0 503.0 1.0 19.6  
OSK-W-17-1134 366.8 369.10 2.3 16.0   VNCR Mallard
including 366.8 367.5 0.7 50.6  
OSK-W-17-1135 115.0 117.4 2.4 3.33   Z27 Zone 27
OSK-W-17-1139 77.0 79.0 2.0 4.06   Shear Caribou
OSK-W-17-1140 326.0 328.4 2.4 3.94   Vein Caribou
including 328.1 328.4 0.3 29.7  
OSK-W-17-1141 87.0 91.1 4.1 4.00   Z27 Zone 27
OSK-W-17-1145 64.3 67.5 3.2 4.01   Z27 FW Zone 27
including 66.5 67.5 1.0 10.2  
OSK-W-17-1159 538.0 540.0 2.0 4.99   Caribou Ext. Caribou
OSK-W-17-1163 356.0 358.0 2.0 9.60   No Name TBD 
including 356.0 357.0 1.0 19.1  
OSK-W-17-1164 120.7 123.0 2.3 3.37   Z27 Zone 27
OSK-W-17-1184 50.0 52.0 2.0 4.21   Z27 HW Zone 27
including 50.5 51.0 0.5 16.8  
  164.9 167.5 2.6 4.64   Z27 Zone 27
including 166.6 167.5 0.9 13.0  
OSK-W-17-1186 407.5 410.5 3.0 12.3   CN2 Caribou
including 407.5 409.0 1.5 24.4  
  502.0 504.5 2.5 3.49   Z27 HW Zone 27
including 502.0 503.0 1.0 8.61  
OSK-W-17-1188 99.2 101.8 2.6 16.8   Z27 Zone 27
including 100.2 100.8 0.6 67.9  
OSK-W-17-1191 194.2 197.0 2.8 13.9   Z27 Zone 27
including 194.2 194.8 0.6 63.4  
  200.5 202.6 2.1 7.46   Z27 Zone 27
including 201.5 202.6 1.1 13.9  
OSK-W-17-1194 325.5 331.4 5.9 3.12   New Zone North of Mallard
including 325.5 326.1 0.6 23.8  
OSK-W-17-1196 185.0 187.0 2.0 15.7   Z27 FW Zone 27
including 186.6 187.0 0.4 72.5  
OSK-W-17-1198 186.9 194.4 7.5 3.47   Z27 Zone 27
including 186.9 188.1 1.2 12.6  
OSK-W-17-1200 245.1 248.0 2.9 3.00   New Zone Caribou
including 247.1 248.0 0.9 8.74  
OSK-W-17-1202 554.8 557.0 2.2 8.71   Caribou Ext. Caribou
including 554.8 555.6 0.8 23.2  
OSK-W-17-1203 269.0 272.0 3.0 6.76   Mallard Mallard
including 270.2 270.7 0.5 31.7  
OSK-W-17-1207 8.0 10.3 2.3 5.94   Drake Mallard
including 8.0 8.8 0.8 14.3  
  182.6 184.9 2.3 3.35   Mallard Mallard
OSK-W-17-1215 105.0 107.0 2.0 4.11   New Zone Underdog
OSK-W-17-1217 14.9 17.1 2.2 5.47   New Zone TBD 
including 15.6 16.4 0.8 14.4  
OSK-W-17-1225 9.0 12.3 3.3 5.77   New Zone TBD 
  201.3 203.6 2.3 9.58   Mallard HW Mallard
including 201.3 202.0 0.7 30.3  
  245.2 247.5 2.3 20.5   Mallard Mallard
including 245.2 246.4 1.2 39.1  
OSK-W-17-1227 926.0 929.4 3.4 6.56   Wolf Ext. Caribou
including 926.0 927.0 1.0 15.8  
  962.0 964.0 2.0 10.5   Wolf Ext. Caribou
  969.0 971.0 2.0 4.93   Wolf Ext. Caribou
OSK-W-17-1233 39.9 42.7 2.8 32.7   No Name  
including 40.5 41.6 1.1 81.3  
OSK-W-17-1239 226.0 228.0 2.0 4.11   Caribou Caribou
  255.2 258.0 2.8 10.4   Caribou Caribou
OSK-W-17-1247 326.0 329.0 3.0 3.00   New Zone Underdog
OSK-W-17-1256 315.0 317.2 2.2 3.11   Mallard Mallard
OSK-W-17-1264 71.1 74.5 3.4 6.33   Z27 HW Zone 27
including 71.4 71.9 0.5 41.4  
  166.5 169.0 2.5 6.88   Z27 Zone 27
including 167.4 167.7 0.3 54.0  
OSK-W-17-1265 738.7 741.0 2.3 5.34   Caribou Ext. Caribou
  940.8 942.8 2.0 13.0   Z27 Zone 27
including 941.2 942.2 1.0 25.7  
OSK-W-17-1267 101.6 104.0 2.4 3.04   Caribou Caribou
OSK-W-17-1268 83.0 85.0 2.0 5.51   New Zone Mallard
  161.0 163.0 2.0 9.39   Drake Mallard
  183.0 186.0 3.0 8.17   Z27 FW Zone 27
including 183.0 183.9 0.9 23.8  
  266.3 268.4 2.1 4.84   Z27 Zone 27
including 266.3 266.8 0.5 15.0  
OSK-W-17-1269 69.5 72.0 2.5 3.10   Z27 HW Zone 27
  117.5 122.0 4.5 3.69   Z27 HW Zone 27
including 117.5 118.0 0.5 8.01  
  134.5 137.5 3.0 3.09   Z27 Zone 27
  146.0 148.4 2.4 3.47   Z27 Zone 27
  175.3 178.0 2.7 3.33   Z27 Zone 27
including 176.0 177.0 1.0 7.47  
OSK-W-17-1270 918.2 926.0 7.8 3.07   Caribou Ext. Caribou
  950.1 953.0 2.9 7.14   Vein Caribou
OSK-W-17-1273 155.9 158.0 2.1 6.72   Z27 Zone 27
including 157.1 158.0 0.9 14.1  
  164.5 167.0 2.5 16.4   Z27 Zone 27
including 165.7 166.2 0.5 80.9  
  171.0 173.2 2.2 29.2   Z27 Zone 27
OSK-W-17-1275 295.7 298.3 2.6 12.4   Caribou Caribou
including 297.8 298.3 0.5 53.2  
OSK-W-17-1276 176.0 178.8 2.8 12.6   Mallard Mallard
including 177.9 178.8 0.9 38.6  
  195.6 197.6 2.0 13.3   Mallard Mallard
including 196.0 196.3 0.3 86.9  
OSK-W-17-1279 146.7 148.9 2.2 4.56   Z27 Zone 27
OSK-W-17-1281 264.0 266.2 2.2 3.24   Caribou Caribou
including 264.9 265.4 0.5 13.3  
  425.0 428.0 3.0 3.25   Z27 Zone 27
  447.9 451.9 4.0 3.37   Z27 Zone 27
OSK-W-17-1282 95.8 98.9 3.1 8.06   Z27 FW Zone 27
OSK-W-17-1288 613.3 615.9 2.6 3.44   Caribou Ext. Caribou
OSK-W-17-1289 39.6 42.2 2.6 5.76   Z27 FW Zone 27
including 41.3 41.8 0.5 23.4  
  314.1 316.7 2.6 5.05   Mallard Mallard
including 315.7 316.4 0.7 13.8  
  368.3 370.8 2.5 3.22   Mallard Mallard
OSK-W-17-1291 282.0 284.0 2.0 3.65   Caribou Ext. Caribou
  305.0 307.0 2.0 11.4   Caribou Ext. Caribou
including 306.0 307.0 1.0 22.6  
OSK-W-17-1292 682.9 686.0 3.1 7.91   Wolf Caribou
including 682.9 683.2 0.3 21.5  
OSK-W-17-1293 584.7 590.0 5.3 3.10   Caribou Ext. Caribou
  601.5 608.0 6.5 3.58   Caribou Ext. Caribou
  645.5 648.0 2.5 3.63   Caribou Ext. Caribou
including 646.4 647.0 0.6 10.2  
OSK-W-17-1296 125.6 128.0 2.4 5.82   Z27 Zone 27
including 125.6 126.0 0.4 23.5  
OSK-W-17-1303 211.0 213.3 2.3 3.74   Caribou Ext. Caribou
OSK-W-17-1305 376.0 378.5 2.5 7.65   Caribou Caribou
including 378.1 378.5 0.4 40.9  
OSK-W-17-1306 987.0 989.6 2.6 14.7   Caribou Ext. Caribou
including 988.2 988.9 0.7 54.2  
OSK-W-17-1308 884.0 889.4 5.4 11.6   Wolf Ext. Caribou
including 888.6 888.9 0.3 66.7  
OSK-W-17-1312 43.0 46.5 3.5 7.56   Z27 HW Zone 27
OSK-W-17-1313 90.9 93.0 2.1 3.34   Caribou Caribou
  122.0 125.0 3.0 5.29   Caribou Caribou
  211.0 213.0 2.0 11.3   Z27 HW Zone 27
  456.0 458.0 2.0 25.2 15.0 Vein  
including 456.5 456.8 0.3 168 100
OSK-W-17-1317 182.9 191.0 8.1 10.0   Z27 Zone 27
including 186.9 188.0 1.1 54.3  
OSK-W-17-1319 215.3 217.3 2.0 7.42   Z27 Zone 27
including 217.0 217.3 0.3 22.8  
OSK-W-17-1320 463.0 465.0 2.0 11.9   Caribou Ext. Caribou
including 463.0 464.0 1.0 23.8  
  472.1 477.3 5.2 5.16   Caribou Ext. Caribou
including 472.1 473.4 1.3 14.1  
  801.0 803.0 2.0 6.04   Caribou Ext. Caribou
including 802.0 803.0 1.0 11.8  
OSK-W-17-1323 433.0 435.2 2.2 5.48   Vein Caribou
OSK-W-17-1326 159.0 161.0 2.0 8.32   Z27 Zone 27
including 160.0 161.0 1.0 16.0  
  180.0 183.3 3.3 6.13   Z27 Zone 27
including 183.0 183.3 0.3 45.1  
OSK-W-17-1332 25.0 27.0 2.0 8.27   New zone TBD 
including 26.2 27.0 0.8 18.8  
OSK-W-17-1333 503.0 506.5 3.5 18.4   Caribou Ext. Caribou
including 504.0 505.0 1.0 53.8  
  593.6 596.0 2.4 4.85   Caribou Ext. Caribou
including 593.6 594.3 0.7 13.8  
  628.0 630.4 2.4 5.89   Caribou Ext. Caribou
including 628.0 628.8 0.8 15.3  
OSK-W-17-1334 338.2 340.7 2.5 3.31