OSISKO WINDFALL INFILL DRILLING RETURNS MORE OF THE SAME

395 g/t Au Over 2.3 Metres and 61.5 g/t Au Over 9.2 Metres

(Toronto, November 5, 2020) Osisko Mining Inc. (OSK:TSX. “Osisko” or the “Corporation”) is pleased to provide new analytical results from the ongoing expansion and definition drill program at its 100% owned Windfall gold project located in the Abitibi greenstone belt, Urban Township, Eeyou Istchee James Bay, Québec.

Drilling is currently focused on the Lynx deposit. Osisko Chief Executive Officer John Burzynski commented: “Infill drilling at Windfall, and in particular Lynx, continues to progress well. Predictably, and with a familiar consistency, once again Lynx delivered on high-grade with our headline intercept of 395 g/t Au over 2.3 metres, and also on width with the very nice intercept of 61.5 g/t Au over 9.2 metres.”

The table below contains resource definition infill intercepts located inside the February 2020 mineral resource estimate wireframes (see Osisko news release dated February 19, 2020). Significant new analytical results are presented below and include 33 intercepts in 16 drill holes and 7 wedges.

Selected high-grade intercepts from the new results include: 395 g/t Au over 2.3 metres OSK-W-20-2292-W1; 61.5 g/t Au over 9.2 metres and 37.0 g/t Au over 3.0 metres in OSK-W-20-2256-W4; 55.5 g/t Au over 2.5 metres in WST-20-0350 and 40.1 g/t Au over 2.8 metres in WST-20-0013. Maps showing hole locations and full analytical results are available at www.osiskomining.com

 

Hole No. From (m) To (m) Interval (m) Au (g/t) uncut Au (g/t)         cut to 100 g/t Zone Corridor
OSK-W-20-2139-W12 905.3 907.9 2.6 28.5   Lynx_371 Triple Lynx
including 906.2 906.8 0.6 88.3
OSK-W-20-2139-W9 886.7 893.0 6.3 15.4   Lynx_371 Triple Lynx
OSK-W-20-2252-W3 865.7 867.7 2.0 11.7   Lynx_371 Triple Lynx
including 865.7 866.0 0.3 58.6
OSK-W-20-2256-W4 862.0 871.2 9.2 61.5 32.6 Lynx_361 Triple Lynx
including 863.0 864.0 1.0 281 100
and 870.0 871.2 1.2 171 100
  881.0 884.0 3.0 37.0   Lynx_361 Triple Lynx
including 882.0 883.0 1.0 86.2
OSK-W-20-2275-W2 628.9 631.0 2.1 8.18   Lynx_365 Triple Lynx
including 628.9 629.8 0.9 18.5
  800.0 802.3 2.3 3.65   Lynx_376 Triple Lynx
including 800.0 800.6 0.6 10.9
OSK-W-20-2283 935.0 937.0 2.0 18.5   Triple Lynx Triple Lynx
including 936.0 936.7 0.7 49.6
OSK-W-20-2292-W1 1040.7 1043.0 2.3 395 15.4 Lynx_374 Triple Lynx
including 1041.3 1041.6 0.3 3010 100
OSK-W-20-2292-W2 909.3 913.0 3.7 3.64   Lynx_375 Triple Lynx
OSK-W-20-2322 1090.3 1094.1 3.8 28.9   Lynx_334 Lynx
including 1090.3 1091.3 1.0 81.9  
WST-20-0011 74.3 76.4 2.1 4.68   Lynx_311 Lynx
WST-20-0012D 81.0 83.0 2.0 3.14   Lynx_311 Lynx
including 82.5 83.0 0.5 8.68
WST-20-0013 140.0 142.8 2.8 40.1 31.5 Lynx_304 Lynx
including 140.7 141.5 0.8 130 100
WST-20-0014A 100.2 102.2 2.0 5.40   Lynx_304 Lynx
WST-20-0350 128.5 131.0 2.5 55.5   Lynx_359 Lynx
including 129.2 129.9 0.7 98.8
WST-20-0352 32.3 36.0 3.7 16.2   Lynx_325 Lynx
including 35.0 36.0 1.0 46.8
  97.0 99.0 2.0 5.95   Lynx_304 Lynx
WST-20-0394 35.1 37.3 2.2 11.7   Lynx_325 Lynx
  70.8 72.8 2.0 4.15   Lynx_311 Lynx
  107.0 109.3 2.3 24.2 23.2 Lynx_304 Lynx
including 107.0 107.7 0.7 78.9 75.7
WST-20-0395 50.0 52.0 2.0 6.45   Lynx_303 Lynx
WST-20-0420 79.4 81.7 2.3 4.11   Lynx_323 Lynx
including 81.4 81.7 0.3 29.1
  150.0 152.1 2.1 19.0   Lynx_321 Lynx
including 151.2 152.1 0.9 43.5
WST-20-0422 160 162 2.0 5.90   Lynx_328 Lynx
WST-20-0482 87.9 90.0 2.1 6.00   Lynx_323 Lynx
WST-20-0484 43.1 45.5 2.4 4.80   Lynx_325 Lynx
including 43.7 44.0 0.3 33.1
  94.2 96.3 2.1 13.5   Lynx_304 Lynx
including 94.8 95.2 0.4 31.0
WST-20-0485 106.3 108.3 2.0 5.55   Lynx_323 Lynx
including 107.9 108.3 0.4 27.2
  119.3 122.0 2.7 12.6   Lynx_304 Lynx
including 119.3 119.7 0.4 60.5
  143.2 145.3 2.1 16.3   Lynx_359 Lynx
including 144.3 145.0 0.7 48.4
WST-20-0486 44.9 47.3 2.4 11.2   Lynx_325 Lynx
Including 46.8 47.3 0.5 34.8
  51.5 54.5 3.0 14.9 Lynx_303 Lynx

Notes: True widths are estimated at 55 – 80% of the reported core length interval. See “Quality Control and Reporting Protocols” below.

Drill hole location

Hole Number Azimuth (°) Dip (°) Length (m) UTM E UTM N Elevation Section
OSK-W-20-2139-W12 115 -52 1038 452980 5435549 420 3450
OSK-W-20-2139-W9 115 -52 1152 452980 5435549 420 3450
OSK-W-20-2252-W3 129 -53 1062 453241 5435694 415 3750
OSK-W-20-2256-W4 125 -51 1122 453160 5435686 414 3675
OSK-W-20-2275-W2 127 -49 1035 452886 5435584 409 3400
OSK-W-20-2283 135 -50 1151 452997 5435607 425 3500
OSK-W-20-2292-W1 125 -54 1149 453037 5435563 420 3525
OSK-W-20-2292-W2 125 -54 1002 453037 5435563 420 3525
OSK-W-20-2322 130 -54 1191 453608 5435713 404 4075
WST-20-0011 157 -54 451 453105 5435065 231 3325
WST-20-0012D 174 -62 465 453226 5435126 134 3475
WST-20-0013 171 -42 169 453357 5435208 154 3625
WST-20-0014A 137 1 124 453359 5435209 155 3625
WST-20-0350 142 -31 175 453359 5435209 154 3625
WST-20-0352 140 -10 177 453359 5435209 155 3625
WST-20-0394 152 -26 172 453358 5435208 154 3625
WST-20-0395 153 -16 169 453358 5435208 155 3625
WST-20-0420 155 -10 166 453450 5435264 116 3725
WST-20-0422 171 -26 177 453449 5435264 117 3725
WST-20-0482 165 -9 181 453449 5435264 117 3725
WST-20-0484 138 -26 160 453359 5435209 154 3625
WST-20-0485 148 -44 181 453359 5435209 154 3625
WST-20-0486 130 -37 162 453359 5435209 154 3625

 

Lynx Zone

Mineralization occurs as grey to translucent quartz-carbonate-pyrite-tourmaline veins and pyrite replacement zones and stockworks. The vein-type is associated with haloes of pervasive sericite-pyrite ± silica alteration and contain sulphides (predominantly pyrite with minor amounts of chalcopyrite, sphalerite, galena, arsenopyrite, and pyrrhotite) and local visible gold. Replacement mineralization is associated with strong pervasive silica-sericite-ankerite ± tourmaline alteration and contains disseminated pyrite from trace to 80% with local visible gold. Pyrite stockworks can form envelopes that reach several tens of metres thick. Fuchsite alteration is common and is spatially constrained to near the gabbros. Mineralization occurs at or near geological contacts between felsic porphyritic or fragmental intrusions and the host rhyolites or gabbros and locally can be hosted along the gabbro-rhyolite contact.

 

Triple Lynx

Mineralization in the Triple Lynx zone is vein-type, quartz-carbonate-pyrite-tourmaline veins, associated with pervasive sericite-pyrite ± silica alteration and contain sulphides similar to the main Lynx Zone, pyrite dominated with minor other sulphides, ranging from trace to up to 70% locally, and local visible gold. Locally fuchsite is present when proximal to the gabbros. Mineralization is hosted in or at the contacts of felsic porphyritic dikes with rhyolites (locally bleached) or gabbros.

 

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 Osisko’s 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 width determination is estimated at 55-80% of the reported core length interval for the zone. 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 (i) ALS Laboratories in Val d’Or, Québec, Thunder Bay, Ontario, Sudbury, Ontario or Vancouver, British Colombia, or (ii) 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 a four acids digestion -MS61 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 Gold Deposit

The Windfall gold deposit is located between Val-d’Or and Chibougamau in Eeyou Istchee James Bay, Québec, Canada. The mineral resource defined by Osisko, as disclosed in the news release dated February 19, 2020 and supported by the technical report entitled “An updated mineral resource estimate for the Windfall Lake Project, Located in the Abitibi Greenstone Belt, Urban Township, Eeyou Istchee James Bay, Québec, Canada” and dated April 3, 2020 (with an effective date of January 3, 2020), and assuming a cut-off grade of 3.5 g/t, comprises 4,127,000 tonnes at 9.1 g/t Au (1,206,000 ounces) in the indicated mineral resource category and 14,532,000 tonnes at 8.40 g/t Au (3,938,000 ounces) in the inferred mineral resource category. The key assumptions, parameters and methods used to estimate the mineral resource estimate disclosed in the February 19,2020 news release are further described in the full technical report prepared by Micon International Limited (“Micon”) and BBA Inc (“BBA”), in accordance with NI 43-101 available on SEDAR (www.sedar.com) under the Corporation’s issuer profile. The Windfall gold deposit is currently one of the highest-grade resource-stage gold projects in Canada and has world-class scale. Mineralization occurs in three principal zones: Lynx, Main Zone, and Underdog. Mineralization is generally comprised of deformed sub-vertical zones plunging to the northeast. Vein-type or pyrite replacement-type styles of mineralization crosscut syn-volcanic host rocks and syn-deformation felsic porphyry intrusions and are spatially associated with the contacts of the intrusions. The deposit is well defined from surface to a depth of 1,200 metres and remains open along strike and at depth. Mineralization has been identified 30 metres from surface in some areas and as deep as 2,000 metres in others, with significant potential to extend mineralization 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% interest in the high-grade Windfall 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 Quévillon area (over 2,700 square kilometres).

 

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 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”, “potential”, “feasibility”, “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 Windfall gold deposit being one of the highest-grade resource-stage gold projects in Canada and having world-class scale; the key assumptions, parameters and methods used to estimate the mineral resource estimate; the prospects, if any, of the Windfall gold deposit; the timing and ability of Osisko, if at all, to publish a feasibility study for the Windfall gold deposit; the projected capital expenditures of mining activities at the Windfall gold deposit; upgrading an inferred mineral resource to a measured mineral resource or indicated mineral resource category; future drilling at the Windfall gold deposit; the deposit remaining open along strike to the northeast and at depth; significant high-grade zones (Lynx 4, Triple Lynx) remaining open down plunge; the plunge potential of the Lynx and Underdog zones; the significance of historic exploration activities and results. 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 and royalty interests in the Windfall 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
Chief Executive Officer
Telephone (416) 363-8653

OSISKO INFILL DRILLING RETURNS HIGH GRADE AT WINDFALL

Including 22.3 g/t Au Over 15.9 Metres

(Toronto, October 8, 2020) Osisko Mining Inc. (OSK:TSX. “Osisko” or the “Corporation”) is pleased to provide new analytical results from the ongoing expansion and definition drill program at its 100% owned Windfall gold project located in the Abitibi greenstone belt, Urban Township, Eeyou Istchee James Bay, Québec.

Drilling is currently focused on the Lynx deposit. Osisko Chief Executive Officer John Burzynski commented: “Infill drilling is progressing very well, daily increasing our confidence in the continuity and prevalence of high-grade mineralization at Windfall. Today’s infill results contain 18 intercepts with uncut average grades of over half an ounce per tonne, including the spectacular 22.3 g/t Au over 15.9 metres, showing that Lynx not only has grade but can also deliver width.”

The table below contains resource definition infill intercepts located inside the February 2020 mineral resource estimate wireframes (see Osisko news release dated February 19, 2020). Significant new analytical results are presented below and include 67 intercepts in 26 drill holes and 8 wedges.

Selected high-grade intercepts from the new results include: 314 g/t Au over 3.0 metres in OSK-W-20-2260-W1; 22.3 g/t Au over 15.9 metres in OSK-W-20-2139-W10; 33.6 g/t Au over 9.8 metres in OSK-W-20-2280-W1; 127 g/t Au over 2.3 metres in OSK-W-20-2256; 97.8 g/t Au over 2.5 metres in OSK-W-20-2292-W1; and 53.4 g/t Au over 2.1 metres in OSK-W-20-2252-W4. Maps showing hole locations and full analytical results are available at www.osiskomining.com

 

Infill Drilling

Hole No. From (m) To (m) Interval (m) Au (g/t) uncut Au (g/t)         cut to 100 g/t Zone Corridor
OSK-W-20-2139-W10 899.0 914.9 15.9 22.3   LYNX_371 TRIPLE LYNX
including 907.1 907.6 0.5 80.2
941.9 944.0 2.1 17.4   Lynx_363 Triple Lynx
OSK-W-20-2197-W2 780.0 782.0 2.0 10.1   Lynx_363 Triple Lynx
including 780.8 781.7 0.9 22.1
OSK-W-20-2252-W2 826.0 828.0 2.0 4.03   Lynx_371 Triple Lynx
833.0 835.0 2.0 4.41   Lynx_371 Triple Lynx
OSK-W-20-2252-W4 880.5 882.6 2.1 53.4 33.2 Lynx_371 Triple Lynx
including 882.0 882.6 0.6 171 100
889.0 892.0 3.0 3.24   Lynx_361 Triple Lynx
902.0 904.0 2.0 41.5   Lynx_361 Triple Lynx
including 903.0 904.0 1.0 82.1
OSK-W-20-2256 852.8 855.0 2.2 44.4 19.7 Lynx_371 Triple Lynx
including 853.2 853.6 0.4 236 100
  881.1 883.4 2.3 127 51.1 Lynx_361 Triple Lynx
including 882.2 882.8 0.6 390 100
894.0 896.2 2.2 4.63   Lynx_361 Triple Lynx
  898.0 900.0 2.0 11.3   Lynx_361 Triple Lynx
  978.9 982.9 4.0 4.44   Lynx_369 Triple Lynx
including 982.2 982.9 0.7 10.5
OSK-W-20-2256-W4 930.0 934.0 4.0 5.63   Lynx_364 Triple Lynx
963.0 965.0 2.0 19.3   Lynx_369 Triple Lynx
including 964.0 964.5 0.5 76.4
OSK-W-20-2260-W1 843.0 846.0 3.0 314 38.0 Lynx_361 Triple Lynx
including 843.4 844.4 1.0 927 100
OSK-W-20-2272 613.0 615.0 2.0 3.45   Lynx_356 Lynx
OSK-W-20-2275 796.0 798.0 2.0 4.38   Lynx_365 Triple Lynx
including 796.0 796.6 0.6 11.3
837.0 839.2 2.2 23.4 22.8 Lynx_365 Triple Lynx
including 837.7 838.2 0.5 102 100
OSK-W-20-2280 1003.7 1006.3 2.6 4.94   Lynx_368 Triple Lynx
including 1003.7 1004.0 0.3 11.1
and 1004.0 1004.4 0.4 10.5
1025.9 1030.1 4.2 8.13   Lynx_363 Triple Lynx
including 1027.0 1027.5 0.5 25.5
1038.0 1040.0 2.0 3.76   Lynx_363 Triple Lynx
including 1039.4 1040.0 0.6 8.10
1067.0 1069.0 2.0 12.5   Lynx_364 Triple Lynx
including 1067.8 1068.1 0.3 52.1
  1079.0 1081.0 2.0 4.09   Lynx_364 Triple Lynx
  1088.7 1094.4 5.7 16.8 12.9 Lynx_369 Triple Lynx
including 1093.2 1093.5 0.3 173 100
1109.0 1111.0 2.0 4.64   Lynx_370 Triple Lynx
OSK-W-20-2280-W1 1006.0 1008.0 2.0 4.22   Lynx_368 Triple Lynx
including 1006.0 1007.0 1.0 8.08
  1013.0 1016.0 3.0 4.82   Lynx_368 Triple Lynx
  1021.9 1024.1 2.2 20.3   Lynx_363 Triple Lynx
  1043.4 1047.6 4.2 27.7   Lynx_363 Triple Lynx
including 1043.7 1044.7 1.0 78.6
  1080.8 1083.0 2.2 4.81   Lynx_364 Triple Lynx
  1097.0 1106.8 9.8 33.6 27.6 Lynx_370 Triple Lynx
including 1102.0 1104.0 2.0 129 100
and 1106.5 1106.8 0.3 108 100
OSK-W-20-2288 624.4 633.9 9.5 12.0   Lynx_356 Lynx
including 629.4 630.0 0.6 27.9
and 632.7 633.3 0.6 28.8
OSK-W-20-2292 852.0 854.0 2.0 3.87   Lynx_363 Triple Lynx
including 852.0 852.7 0.7 10.9
OSK-W-20-2292-W1 835.9 838.0 2.1 3.39   Lynx_361 Triple Lynx
840.0 843.5 3.5 3.65   Lynx_361 Triple Lynx
including 840.0 840.4 0.4 7.83
and 843.0 843.5 0.5 9.84
857.0 859.3 2.3 26.0   Lynx_363 Triple Lynx
including 858.3 859.3 1.0 57.6
889.5 892.0 2.5 97.8 32.2 Lynx_364 Triple Lynx
including 890.3 891.1 0.8 305 100
OSK-W-20-2293 139.9 142.4 2.5 5.25   F17_6005 F-17
including 142.0 142.4 0.4 18.0
OSK-W-20-2297 128.0 131.0 3.0 29.3 24.2 F17_6003 F-17
including 128.0 128.4 0.4 138 100
166.5 168.8 2.3 5.82   F17_6005 F-17
OSK-W-20-2300 149.7 154.0 4.3 7.42   F17_6005 F-17
including 151.0 152.0 1.0 15.6
OSK-W-20-2312 126.0 128.0 2.0 7.26   Mallard_5200 Mallard
including 127.0 127.6 0.6 22.6
OSK-W-20-2315 127.0 129.0 2.0 5.59   Mallard_5200 Mallard
157.0 159.0 2.0 4.13   Mallard_5213 Mallard
OSK-W-20-2321 166.3 168.5 2.2 6.40   Mallard_5213 Mallard
including 167.2 167.8 0.6 21.2
OSK-W-20-2323 153.0 155.0 2.0 3.88   Mallard_5213 Mallard
including 154.7 155.0 0.3 24.1
OSK-W-20-2327 105.3 111.4 6.1 13.6   Mallard_5213 Mallard
including 109.0 110.0 1.0 48.9
WST-20-0135 72.0 74.3 2.3 4.20   Lynx_311 Lynx
including 73.9 74.3 0.4 14.6
WST-20-0318 65.0 68.5 3.5 36.2   Lynx_311 Lynx
including 66.0 66.7 0.7 91.0
WST-20-0389A 192.0 194.3 2.3 9.23   Lynx_341 Lynx
including 192.0 192.6 0.6 23.5
553.9 555.9 2.0 3.44   Lynx_340 Lynx
including 553.9 554.3 0.4 15.7
WST-20-0391A 91.6 94.1 2.5 6.21   Lynx_304 Lynx
including 93.4 94.1 0.7 17.6
98.3 100.5 2.2 3.47   Lynx_304 Lynx
WST-20-0392 82.8 84.8 2.0 8.12   Lynx_323 Lynx
including 83.4 83.8 0.4 26.3
  88.0 90.2 2.2 5.49   Lynx_323 Lynx
  107.0 109.7 2.7 11.2   Lynx_304 Lynx
including 108.4 108.8 0.4 70.9
WST-20-0393 48.9 51.5 2.6 4.68   Lynx_325 Lynx
including 50.0 50.7 0.7 10.2
113.2 115.9 2.7 5.34   Lynx_304 Lynx
including 114.3 114.8 0.5 18.8
WST-20-0402 142.1 144.4 2.3 25.8 14.3 Lynx_301 Lynx
including 142.1 142.4 0.3 189 100
WST-20-0409 85.4 87.4 2.0 3.37   Lynx_323 Lynx
WST-20-0412 97.6 99.9 2.3 9.21   Lynx_323 Lynx
including 99.6 99.9 0.3 48.5
WST-20-0421 87.6 90.0 2.4 3.87   Lynx_323 Lynx
including 88.2 88.5 0.3 28.3
151.0 153.2 2.2 4.96   Lynx_321 Lynx
including 152.3 153.2 0.9 11.2
WST-20-0423 101.0 103.7 2.7 5.56   Lynx_304 Lynx
109.0 112.0 3.0 9.95   Lynx_359 Lynx
WST-20-0424 115.0 117.0 2.0 8.3   Lynx_359 Lynx
including 116.0 117.0 1.0 15.4

Notes: True widths are estimated at 55 – 80% of the reported core length interval. See “Quality Control and Reporting Protocols” below.

DRILL HOLE LOCATION

Hole Number Azimuth (°) Dip (°) Length (m) UTM E UTM N Elevation Section
OSK-W-20-2139-W10 115 -52 1212 452980 5435549 420 3450
OSK-W-20-2197-W2 121 -48 1064 453087 5435526 417 3550
OSK-W-20-2252-W2 129 -54 1194 453241 5435694 415 3750
OSK-W-20-2252-W4 129 -54 1143 453241 5435694 415 3750
OSK-W-20-2256 125 -51 1179 453160 5435686 414 3675
OSK-W-20-2256-W4 125 -51 1122 453160 5435686 414 3675
OSK-W-20-2260-W1 127 -48 1140 453201 5435667 413 3700
OSK-W-20-2272 149 -45 1004 452967 5435265 412 3300
OSK-W-20-2275 127 -49 1094 452886 5435584 409 3400
OSK-W-20-2280 127 -58 1161 453304 5435639 415 3775
OSK-W-20-2280-W1 127 -58 1170 453304 5435639 415 3775
OSK-W-20-2288 146 -51 749 452875 5435181 409 3175
OSK-W-20-2292 125 -54 1059 453037 5435563 420 3525
OSK-W-20-2292-W1 125 -54 1149 453037 5435563 420 3525
OSK-W-20-2293 145 -44 183 452658 5435549 406 3175
OSK-W-20-2297 149 -47 180 452652 5435567 405 3175
OSK-W-20-2300 152 -45 192 452699 5435578 406 3225
OSK-W-20-2312 334 -51 192 451964 5434816 408 2225
OSK-W-20-2315 334 -52 192 451979 5434805 407 2225
OSK-W-20-2321 332 -51 176 451958 5434790 407 2200
OSK-W-20-2323 335 -49 171 451936 5434791 405 2175
OSK-W-20-2327 334 -49 132 451901 5434810 401 2150
WST-20-0135 187 -58 444 453226 5435125 134 3475
WST-20-0318 148 -52 502 453228 5435127 134 3475
WST-20-0389A 115 -46 616 453452 5435266 115 3725
WST-20-0391A 135 8 174 453359 5435209 155 3625
WST-20-0392 126 2 181 453359 5435209 155 3625
WST-20-0393 153 -37 175 453358 5435208 154 3625
WST-20-0402 147 32 162 453493 5435287 119 3775
WST-20-0409 155 21 169 453450 5435264 117 3725
WST-20-0412 164 24 165 453450 5435264 117 3725
WST-20-0421 162 16 168 453450 5435264 117 3725
WST-20-0423 134 -18 142 453359 5435209 154 3625
WST-20-0424 160 5 178 453358 5435208 155 3625

 

Lynx Zone

Mineralization occurs as grey to translucent quartz-carbonate-pyrite-tourmaline veins and pyrite replacement zones and stockworks. The vein-type is associated with haloes of pervasive sericite-pyrite ± silica alteration and contain sulphides (predominantly pyrite with minor amounts of chalcopyrite, sphalerite, galena, arsenopyrite, and pyrrhotite) and local visible gold. Replacement mineralization is associated with strong pervasive silica-sericite-ankerite ± tourmaline alteration and contains disseminated pyrite from trace to 80% with local visible gold. Pyrite stockworks can form envelopes that reach several tens of metres thick. Fuchsite alteration is common and is spatially constrained to near the gabbros. Mineralization occurs at or near geological contacts between felsic porphyritic or fragmental intrusions and the host rhyolites or gabbros and locally can be hosted along the gabbro-rhyolite contact.

 

F-Zone

Mineralization is hosted in sheared andesites with carbonate replacement or quartz veining and occurs as quartz ± ankerite veinlets or in shear zones as replacement, characterised by trace to 10% pyrite with local visible gold. Alteration is dominated by sericite-fuchsite-tourmaline-pyrite.

 

Mallard

Mineralization is hosted in sheared mafic volcanics with felsic porphyritic intrusions and occurs as veins associated with sericite-pyrite ± silica ± chlorite alteration and contains pyrite ranging from trace to 30% and local visible gold.

 

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 Osisko’s 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 width determination is estimated at 55-80% of the reported core length interval for the zone. 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 (i) ALS Laboratories in Val d’Or, Québec, Thunder Bay, Ontario, Sudbury, Ontario or Vancouver, British Colombia, or (ii) 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, QualityAssurance/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 Gold Deposit

The Windfall gold deposit is located between Val-d’Or and Chibougamau in Eeyou Istchee James Bay, Québec, Canada. The mineral resource defined by Osisko, as disclosed in the news release dated February 19, 2020 and supported by the technical report entitled “An updated mineral resource estimate for the Windfall Lake Project, Located in the Abitibi Greenstone Belt, Urban Township, Eeyou Istchee James Bay, Québec, Canada” and dated April 3, 2020 (with an effective date of January 3, 2020), and assuming a cut-off grade of 3.5 g/t, comprises 4,127,000 tonnes at 9.1 g/t Au (1,206,000 ounces) in the indicated mineral resource category and 14,532,000 tonnes at 8.40 g/t Au (3,938,000 ounces) in the inferred mineral resource category. The key assumptions, parameters and methods used to estimate the mineral resource estimate disclosed in the February 19,2020 news release are further described in the full technical report prepared by Micon International Limited (“Micon”) and BBA Inc (“BBA”), in accordance with NI 43-101 available on SEDAR (www.sedar.com) under the Corporation’s issuer profile. The Windfall gold deposit is currently one of the highest-grade resource-stage gold projects in Canada and has world-class scale. Mineralization occurs in three principal zones:Lynx, Main Zone, and Underdog. Mineralization is generally comprised of deformed sub-vertical zones plunging to the northeast. Vein-type or pyrite replacement-type styles of mineralization crosscut syn-volcanic host rocks and syn-deformation felsic porphyry intrusions and are spatially associated with the contacts of the intrusions. The deposit is well defined from surface to a depth of 1,200 metres and remains open along strike and at depth.Mineralization has been identified 30 metres from surface in some areas and as deep as 2,000 metres in others, with significant potential to extend mineralization 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% interest in the high-grade Windfall gold deposit located between Val-d’Or and Chibougamau in Québec and holds a100% undivided interest in a large area of claims in the surrounding Urban Barry area and nearby Quévillon area (over 2,700 square kilometres).

 

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 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”, “potential”, “feasibility”, “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 Windfall gold deposit being one of the highest-grade resource-stage gold projects in Canada and having world-class scale; the key assumptions, parameters and methods used to estimate the mineral resource estimate; the prospects, if any, of the Windfall gold deposit; the timing and ability of Osisko, if at all, to publish a feasibility study for the Windfall gold deposit; the projected capital expenditures of mining activities at the Windfall gold deposit; upgrading an inferred mineral resource to a measured mineral resource or indicated mineral resource category; future drilling at the Windfall gold deposit; the deposit remaining open along strike to the northeast and at depth; significant high-grade zones (Lynx 4, Triple Lynx) remaining open down plunge; the plunge potential of the Lynx and Underdog zones; the significance of historic exploration activities and results. 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 and royalty interests in the Windfall 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
Chief Executive Officer
Telephone (416) 363-8653

OSISKO STEP-OUT DRILLING EXPANDS HIGH GRADE AT WINDFALL

Including 391 g/t Au Over 2.4 Metres in Triple Lynx

(Toronto, October 7, 2020) Osisko Mining Inc. (OSK:TSX. “Osisko” or the “Corporation”) is pleased to provide new analytical results from the ongoing drill program at its 100% owned Windfall gold project located in the Abitibi greenstone belt, Urban Township, Eeyou Istchee James Bay, Québec.

Drilling is currently focused on the Lynx deposit. Osisko Chief Executive Officer John Burzynski commented: “Windfall continues to grow in scale with impressive results flowing in from the Lynx deposit.  Today’s new intersections are all from outside the published resource area and include 15 intercepts with uncut average grades of over one oz/t. The ongoing expansion drilling continues to show the incredible upside growth potential of our deposit.”

The table below shows intercepts located outside the February 2020 mineral resource estimate wireframes (see Osisko news release dated February 19, 2020). These intercepts either expand the resource wireframes or are located in a defined zone/corridor but not yet correlated to a specific wireframe. Significant new analytical results are presented below and include 110 intercepts in 43 drill holes and 24 wedges.

Selected high-grade intercepts from the new results include: 391 g/t Au over 2.4 metres, 70 metres toward surface from wireframe Lynx_361, in OSK-W-20-2133-W2; 142 g/t Au over 2.3 metres in OSK-W-20-2307; 86.0 g/t Au over 2.1 metres in WST-20-0341A; 73.8 g/t Au over 2.0 metres in WST-20-0470; 54.4 g/t Au over 4.8 metres in OSK-W-20-2252-W2; and 49.8 g/t Au over 2.2 metres in OSK-W-20-2292. Maps showing hole locations and full analytical results are available at www.osiskomining.com

Expansion Drilling

Hole No. From (m) To (m) Interval (m) Au (g/t) uncut Au (g/t)         cut to 100 g/t Zone Corridor
OSK-W-17-1258 971.7 973.7 2.0 3.33   LYNX 4 LYNX
including 971.7 972.7 1.0 6.56
OSK-W-18-1727 782.9 784.9 2.0 12.7   Lynx Lynx
OSK-W-19-1857-W11 1301.8 1304.6 2.8 7.39   Lynx 4 Lynx
OSK-W-19-2100-W4 1212.5 1214.7 2.2 5.22   Triple Lynx Triple Lynx
1242.0 1244.0 2.0 6.47   Triple Lynx Triple Lynx
OSK-W-19-2101 664.4 667.0 2.6 5.48   Triple Lynx Triple Lynx
OSK-W-20-2133-W2 783.6 786.0 2.4 391 31.1 Lynx_361 Triple Lynx
including 784.2 784.6 0.4 2260 100
OSK-W-20-2139-W7 1081.0 1083.5 2.5 9.53   Triple Lynx Triple Lynx
including 1081.0 1081.9 0.9 26.1
OSK-W-20-2139-W8 543.0 545.0 2.0 6.68   Triple Lynx Triple Lynx
including 543.5 544.4 0.9 14.5
OSK-W-20-2139-W10 1196.0 1198.0 2.0 11.7   Triple Lynx Triple Lynx
including 1196.0 1197.1 1.1 21.3
OSK-W-19-2169 893.9 895.9 2.0 5.59   Lynx 4 Lynx
including 894.7 895.3 0.6 18.2
1256.3 1258.4 2.1 15.8   Lynx 4 Lynx
including 1257.5 1258.4 0.9 36.2
OSK-W-20-2170-W6 1384.0 1386.4 2.4 6.70   Lynx 4 Lynx
OSK-W-19-2173 29.0 31.0 2.0 3.07   F11 F11
OSK-W-19-2177 200.0 202.0 2.0 3.10   F11 F11
OSK-W-20-2197-W2 768.7 771.4 2.7 10.3   Lynx_361 Triple Lynx
including 769.7 770.7 1.0 26.0
1045.0 1047.0 2.0 5.66   Lynx 4 Lynx
OSK-W-20-2217-W2 860.0 862.0 2.0 14.0   Triple Lynx Triple Lynx
including 860.0 860.5 0.5 55.6
OSK-W-20-2217-W3 830.0 832.3 2.3 7.53   Lynx_363 Triple Lynx
including 831.0 831.4 0.4 26.8
  1111.7 1114.0 2.3 16.4   Triple Lynx Triple Lynx
including 1113.5 1114.0 0.5 66.3
OSK-W-20-2249 730.0 732.0 2.0 5.66   Lynx SW Lynx
including 730.5 730.9 0.4 22.8
OSK-W-20-2250 1002.2 1005.0 2.8 18.1 15.6 Triple Lynx Triple Lynx
including 1002.2 1002.5 0.3 123 100
OSK-W-20-2250-W1 1009.0 1011.1 2.1 5.08   Triple Lynx Triple Lynx
OSK-W-20-2250-W2 1024.7 1028.0 3.3 28.8   Triple Lynx Triple Lynx
including 1026.4 1027.0 0.6 63.0
OSK-W-20-2250-W3 714.0 716.5 2.5 14.7   Triple Lynx Triple Lynx
OSK-W-20-2250-W4 727.7 734.5 6.8 4.58   Triple Lynx Triple Lynx
including 727.7 728.4 0.7 10.3
and 730.5 731.0 0.5 12.0
855.4 858.0 2.6 6.29   Triple Lynx Triple Lynx
including 857.2 858.0 0.8 18.6
OSK-W-20-2252-W2 812.0 814.0 2.0 7.64   Triple Lynx Triple Lynx
817.2 822.0 4.8 54.4 10.4 Triple Lynx Triple Lynx
including 817.2 817.5 0.3 804 100
OSK-W-20-2252-W3 824.3 829.7 5.4 3.58   Triple Lynx Triple Lynx
  845.1 847.1 2.0 4.01   Triple Lynx Triple Lynx
OSK-W-20-2253 387.5 389.5 2.0 4.30   Caribou Corridor Caribou
OSK-W-20-2256 870.0 872.8 2.8 9.81   Triple Lynx Triple Lynx
OSK-W-20-2256-W2 815.0 817.0 2.0 3.17   Triple Lynx Triple Lynx
OSK-W-20-2260-W2 1091.0 1093.0 2.0 6.47   Triple Lynx Triple Lynx
including 1091.4 1092.1 0.7 18.1
1174.4 1176.5 2.1 9.43   Triple Lynx Triple Lynx
including 1176.0 1176.5 0.5 28.0
OSK-W-20-2263 94.0 96.0 2.0 8.58   Bobcat Bobcat
including 94.0 95.0 1.0 16.9
106.7 108.8 2.1 6.12   Bobcat Bobcat
including 108.0 108.8 0.8 14.1
710.0 712.0 2.0 42.6 21.4 Lynx SW Lynx
including 711.2 711.6 0.4 206 100
OSK-W-20-2266 1027.4 1029.5 2.1 5.58   Triple Lynx Triple Lynx
including 1028.7 1029.0 0.3 33.1
OSK-W-20-2266-W1 776.8 779.2 2.4 5.73   Triple Lynx Triple Lynx
including 778.0 779.2 1.2 11.1
797.3 799.3 2.0 3.08   Lynx_364 Triple Lynx
OSK-W-20-2266-W2 717.4 719.4 2.0 19.9   Lynx_363 Triple Lynx
OSK-W-20-2267 50.4 52.8 2.4 15.4   Bobcat Bobcat
including 51.0 51.5 0.5 46.4
OSK-W-20-2268-W1 737.1 739.3 2.2 7.46   Triple Lynx Triple Lynx
including 738.3 739.0 0.7 19.0
819.0 821.3 2.3 27.4   Triple Lynx Triple Lynx
including 819.0 820.0 1.0 45.7
1027.0 1029.0 2.0 6.70   Triple Lynx Triple Lynx
including 1027.4 1028.2 0.8 16.5
OSK-W-20-2268-W2 999.0 1001.0 2.0 5.08   Triple Lynx Triple Lynx
OSK-W-20-2269 97.3 99.5 2.2 8.21   Bobcat Bobcat
including 98.0 98.4 0.4 30.8
518.2 520.6 2.4 3.37   Lynx SW Lynx
886.0 888.0 2.0 14.0   Lynx SW Lynx
including 886.5 886.8 0.3 92.5
OSK-W-20-2271 809.6 815.2 5.6 6.69   Lynx Lynx
including 814.2 815.2 1.0 17.4
841.1 843.1 2.0 18.2   Lynx Lynx
including 842.1 843.1 1.0 35.0
877.0 879.0 2.0 5.36   Lynx Lynx
including 877.9 878.2 0.3 27.8
OSK-W-20-2272 683.0 685.1 2.1 13.0   Triple Lynx Triple Lynx
including 683.0 683.9 0.9 29.7
OSK-W-20-2273 706.7 708.7 2.0 8.32   Lynx_363 Triple Lynx
including 706.7 707.2 0.5 22.4
1013.8 1017.3 3.5 4.78   Triple Lynx Triple Lynx
including 1015.1 1015.5 0.4 16.1
OSK-W-20-2280 1013.2 1016.7 3.5 5.23   Triple Lynx Triple Lynx
including 1013.8 1014.2 0.4 26.7
and 1016.4 1016.7 0.3 11.3
1084.7 1087.0 2.3 4.27   Triple Lynx Triple Lynx
OSK-W-20-2280-W1 1090.0 1092.0 2.0 11.8   Triple Lynx Triple Lynx
OSK-W-20-2282 308.4 310.8 2.4 6.13   Bobcat Bobcat
including 309.0 309.5 0.5 16.6
OSK-W-20-2283 808.0 813.4 5.4 33.5 29.0 Triple Lynx Triple Lynx
including 810.8 811.3 0.5 73.1
and 811.7 812.0 0.3 182 100
819.0 821.0 2.0 7.27   Triple Lynx Triple Lynx
including 819.6 820.0 0.4 24.1
823.2 825.5 2.3 4.30   Triple Lynx Triple Lynx
including 823.6 824.4 0.8 10.6
1001.0 1003.2 2.2 44.8 23.6 Triple Lynx Triple Lynx
including 1002.7 1003.2 0.5 194 100
1018.0 1020.0 2.0 19.3   Triple Lynx Triple Lynx
including 1018.9 1019.5 0.6 54.4
OSK-W-20-2288 467.0 469.8 2.8 8.13   Lynx SW Lynx
including 467.0 467.4 0.4 38.9
OSK-W-20-2292 390.0 392.0 2.0 7.18   Lynx Lynx
including 391.7 392.0 0.3 19.3
  835.4 837.8 2.4 4.47   Triple Lynx Triple Lynx
  845.0 847.0 2.0 11.8   Lynx_361 Triple Lynx
including 845.8 846.3 0.5 41.0
882.0 884.0 2.0 8.01   Lynx_364 Triple Lynx
including 883.0 884.0 1.0 15.7
1007.2 1009.2 2.0 49.8 21 Lynx_372 Triple Lynx
including 1008.8 1009.2 0.4 244 100
OSK-W-20-2295 651.2 658.0 6.8 12.4   Triple Lynx Triple Lynx
including 652.4 652.7 0.3 28.7
and 653.4 654.0 0.6 45.9
and 656.1 656.7 0.6 56.9
891.7 893.7 2.0 11.6   Lynx SW Triple Lynx
including 891.7 892.7 1.0 23.0
OSK-W-20-2295-W1 648.6 651.4 2.8 45.1 30.1 Triple Lynx Triple Lynx
including 650.0 650.7 0.7 160 100
OSK-W-20-2298 169.0 171.7 2.7 7.41   Bobcat Bobcat
including 169.0 169.7 0.7 20.2
245.0 247.0 2.0 6.59   Bobcat Bobcat
including 245.0 245.7 0.7 18.4
373.0 375.0 2.0 16.7   Lynx SW Lynx
including 373.8 374.3 0.5 65.2
OSK-W-20-2305 630.8 635.0 4.2 4.47   Triple Lynx Triple Lynx
including 634.0 635.0 1.0 9.32
  876.0 878.3 2.3 10.7   Triple Lynx Triple Lynx
including 877.6 878.3 0.7 31.6
882.2 884.6 2.4 43.0 18.0 Triple Lynx Triple Lynx
including 883.4 883.8 0.4 250 100
OSK-W-20-2306 137.8 140.0 2.2 4.30   Bobcat Bobcat
  147.1 149.4 2.3 3.12   Bobcat Bobcat
  275.0 277.3 2.3 8.58   Bobcat Bobcat
including 275.8 276.5 0.7 20.7
386.1 388.3 2.2 3.94   Lynx SW Lynx
including 386.6 387.0 0.4 11.5
OSK-W-20-2307 689.6 691.9 2.3 142 75.8 Lynx_341 Lynx
including 690.0 690.4 0.4 413 100
OSK-W-20-2310 69.7 72.0 2.3 35.6 13.8 Mallard_5200 Mallard
including 70.8 71.1 0.3 267 100
OSK-W-20-2312 85.0 87.3 2.3 7.19   Mallard Mallard
including 85.7 86.2 0.5 25.4
OSK-W-20-2324 90.0 92.5 2.5 8.43   Mallard Mallard
WST-20-0135 293.0 295.1 2.1 35.1 19.2 Lynx SW Lynx
including 293.7 294.1 0.4 184 100
351.8 354.7 2.9 3.15   Lynx SW Lynx
including 351.8 352.3 0.5 8.55
and 354.1 354.7 0.6 7.76
360.4 362.6 2.2 13.4   Triple Lynx Triple Lynx
including 360.4 361.4 1.0 28.9
397.3 399.4 2.1 23.6 14.5 Lynx SW Lynx
including 397.8 398.1 0.3 164 100
WST-20-0318 377.4 379.6 2.2 8.05   Lynx SW Lynx
463.3 466.0 2.7 9.06   Lynx 4 Lynx
WST-20-0339 199.1 202.2 3.1 4.57   Lynx HW Lynx
WST-20-0341A 306.1 308.2 2.1 86.0 19.9 Lynx SW Lynx
including 306.1 306.5 0.4 447 100
346.1 348.1 2.0 10.6   Lynx SW Lynx
including 347.3 347.7 0.4 50.2
WST-20-0345 361.7 363.9 2.2 3.75   Caribou corridor Caribou
including 362.3 363.1 0.8 9.43
WST-20-0400 158.0 160.2 2.2 11.2   Lynx_301 Lynx
including 159.0 160.2 1.2 19.7
WST-20-0411 148.2 150.4 2.2 38.1 36.1 Lynx HW Lynx
including 149.2 149.9 0.7 107 100
WST-20-0412 155.0 157.2 2.2 3.06   Lynx_328 Lynx
including 156.9 157.2 0.3 11.2
WST-20-0417 190.6 192.6 2.0 22.4   Lynx Lynx
including 190.6 191.2 0.6 41.5
428.2 430.2 2.0 4.06   Lynx 4 Lynx
WST-20-0423 125.0 127.0 2.0 5.23   Lynx Lynx
including 125.0 125.7 0.7 14.9
WST-20-0459 204.3 206.4 2.1 20.6   Lynx SW Lynx
including 205.9 206.4 0.5 76.2
WST-20-0462 171.0 173.0 2.0 40.4   Lynx Lynx
including 171.5 172.5 1.0 79.1
454.0 456.0 2.0 3.50   Lynx_336 Lynx
including 454.0 454.8 0.8 8.19
638.9 643.2 4.3 3.82   Lynx Lynx
including 638.9 639.6 0.7 12.6
WST-20-0470 86.2 88.2 2.0 73.8 15.0 Lynx Lynx
including 87.5 87.8 0.3 492 100

Notes: True widths are estimated at 55 – 80% of the reported core length interval. See “Quality Control and Reporting Protocols” below. SW = Southwest.

DRILL HOLE LOCATION

Hole Number Azimuth (°) Dip (°) Length (m) UTM E UTM N Elevation Section
OSK-W-17-1258 126 -51 1128 452972 5435211 416 3275
OSK-W-18-1727 331 -61 810 453461 5435040 396 3625
OSK-W-19-1857-W11 108 -58 1385 453525 5435704 405 4000
OSK-W-19-2100-W4 122 -47 1260 453095 5435726 423 3650
OSK-W-19-2101 18 -68 909 453426 5434779 396 3475
OSK-W-19-2169 130 -50 1268 453215 5435512 410 3650
OSK-W-19-2173 156 -46 234 452182 5435722 407 2850
OSK-W-19-2177 153 -51 396 452454 5435997 406 3225
OSK-W-20-2133-W2 118 -49 1139 453080 5435531 417 3525
OSK-W-20-2139-W7 115 -52 1164 452980 5435549 420 3450
OSK-W-20-2139-W8 115 -52 1125 452980 5435549 420 3450
OSK-W-20-2139-W10 115 -52 1212 452980 5435549 420 3450
OSK-W-20-2170-W6 128 -59 1407 453425 5435657 413 3900
OSK-W-20-2197-W2 121 -48 1064 453087 5435526 417 3550
OSK-W-20-2217-W2 134 -48 893 452944 5435565 418 3425
OSK-W-20-2217-W3 134 -48 1128 452944 5435565 418 3425
OSK-W-20-2249 132 -56 759 452775 5435192 411 3100
OSK-W-20-2250 132 -57 1064 453129 5435505 419 3575
OSK-W-20-2250-W1 132 -57 1060 453129 5435505 419 3575
OSK-W-20-2250-W2 132 -57 1134 453129 5435505 419 3575
OSK-W-20-2250-W3 132 -57 1170 453129 5435505 419 3575
OSK-W-20-2250-W4 132 -57 1005 453129 5435505 419 3575
OSK-W-20-2252-W2 129 -54 1194 453241 5435694 415 3750
OSK-W-20-2252-W3 129 -53 1062 453241 5435694 415 3750
OSK-W-20-2253 128 -54 924 452831 5435326 413 3225
OSK-W-20-2256 125 -51 1179 453160 5435686 414 3675
OSK-W-20-2256-W2 125 -51 957 453160 5435686 414 3675
OSK-W-20-2260-W2 127 -48 1191 453201 5435667 413 3700
OSK-W-20-2263 128 -49 1029 452926 5435187 413 3225
OSK-W-20-2266 128 -55 1050 453067 5435478 418 3500
OSK-W-20-2266-W1 128 -55 1116 453067 5435478 418 3500
OSK-W-20-2266-W2 128 -55 1131 453067 5435478 418 3500
OSK-W-20-2267 135 -52 66 452972 5435210 416 3275
OSK-W-20-2268-W1 127 -55 1073 453148 5435488 418 3575
OSK-W-20-2268-W2 127 -55 1038 453148 5435488 418 3575
OSK-W-20-2269 133 -50 933 452972 5435210 416 3275
OSK-W-20-2271 120 -53 1247 453462 5435683 410 3950
OSK-W-20-2272 149 -45 1004 452967 5435265 412 3300
OSK-W-20-2273 129 -51 1059 453067 5435478 417 3500
OSK-W-20-2280 127 -58 1161 453304 5435639 415 3775
OSK-W-20-2280-W1 127 -58 1170 453304 5435639 415 3775
OSK-W-20-2282 148 -56 588 452875 5435181 409 3175
OSK-W-20-2283 135 -50 1151 452997 5435607 425 3500
OSK-W-20-2288 146 -51 749 452875 5435181 409 3175
OSK-W-20-2292 125 -54 1059 453037 5435563 420 3525
OSK-W-20-2295 132 -51 987 452938 5435472 415 3375
OSK-W-20-2295-W1 132 -51 960 452938 5435472 415 3375
OSK-W-20-2298 137 -50 596 452847 5435059 407 3100
OSK-W-20-2305 124 -55 911 453026 5435408 413 3425
OSK-W-20-2306 152 -55 531 452872 5435155 407 3175
OSK-W-20-2307 124 -54 878 453397 5435557 413 3825
OSK-W-20-2310 333 -51 144 451970 5434835 407 2225
OSK-W-20-2312 334 -51 192 451964 5434816 408 2225
OSK-W-20-2324 334 -51 167 451944 5434811 406 2200
WST-20-0135 187 -58 444 453226 5435125 134 3475
WST-20-0318 148 -52 502 453228 5435127 134 3475
WST-20-0339 146 -18 295 453410 5435229 114 3675
WST-20-0341A 163 -42 493 453228 5435126 134 3475
WST-20-0345 136 -21 401 452282 5434975 263 2575
WST-20-0400 167 16 172 453493 5435287 118 3775
WST-20-0411 156 38 171 453450 5435264 118 3725
WST-20-0412 164 24 165 453450 5435264 117 3725
WST-20-0417 138 -50 759 453228 5435126 134 3475
WST-20-0423 134 -18 142 453359 5435209 154 3625
WST-20-0459 153 -47 579 453227 5435126 135 3475
WST-20-0462 152 -53 680 453227 5435125 134 3475
WST-20-0470 158 9 184 453493 5435287 118 3775

 

Lynx Zone

Mineralization occurs as grey to translucent quartz-carbonate-pyrite-tourmaline veins and pyrite replacement zones and stockworks. The vein-type is associated with haloes of pervasive sericite-pyrite ± silica alteration and contain sulphides (predominantly pyrite with minor amounts of chalcopyrite, sphalerite, galena, arsenopyrite, and pyrrhotite) and local visible gold. Replacement mineralization is associated with strong pervasive silica-sericite-ankerite ± tourmaline alteration and contains disseminated pyrite from trace to 80% with local visible gold. Pyrite stockworks can form envelopes that reach several tens of metres thick. Fuchsite alteration is common and is spatially constrained to near the gabbros. Mineralization occurs at or near geological contacts between felsic porphyritic or fragmental intrusions and the host rhyolites or gabbros and locally can be hosted along the gabbro-rhyolite contact.

 

Caribou Zone

Mineralization most commonly occurs in gold-bearing pyrite stockworks as well as semi-massive pyrite replacement zones associated with phyllic alteration (sericite-pyrite ± silica) with sulphides, pyrite dominated with minor chalcopyrite and sphalerite ranging from trace to up to 20%, and local visible gold. Mineralization is hosted in rhyolites or mafic-intermediate volcanics frequently at or near faults or the contact with felsic porphyritic intrusions.

 

F-Zone

Mineralization is hosted in sheared andesites with carbonate replacement or quartz veining and occurs as quartz ± ankerite veinlets or in shear zones as replacement, characterised by trace to 10% pyrite with local visible gold. Alteration is dominated by sericite-fuchsite-tourmaline-pyrite.

 

Bobcat

Mineralization most commonly occurs in gold-bearing quartz-pyrite veins controlled by northeast trending faults and shears and to a lesser extent in minor crustiform quartz-tourmaline-ankerite-pyrite veins and pyrite replacement zones and stockwork. Mineralization is hosted in sheared mafic volcanics, rhyolites near faults, or at the contact with felsic porphyritic intrusions.

 

Mallard

Mineralization is hosted in sheared mafic volcanics with felsic porphyritic intrusions and occurs as veins associated with sericite-pyrite ± silica ± chlorite alteration and contains pyrite ranging from trace to 30% and local visible gold.

 

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 Osisko’s 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 width determination is estimated at 55-80% of the reported core length interval for the zone. 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 (i) ALS Laboratories in Val d’Or, Québec, Thunder Bay, Ontario, Sudbury, Ontario or Vancouver, British Colombia, or (ii) 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 Gold Deposit

The Windfall gold deposit is located between Val-d’Or and Chibougamau in Eeyou Istchee James Bay, Québec, Canada. The mineral resource defined by Osisko, as disclosed in the news release dated February 19, 2020 and supported by the technical report entitled “An updated mineral resource estimate for the Windfall Lake Project, Located in the Abitibi Greenstone Belt, Urban Township, Eeyou Istchee James Bay, Québec, Canada” and dated April 3, 2020 (with an effective date of January 3, 2020), and assuming a cut-off grade of 3.5 g/t, comprises 4,127,000 tonnes at 9.1 g/t Au (1,206,000 ounces) in the indicated mineral resource category and 14,532,000 tonnes at 8.40 g/t Au (3,938,000 ounces) in the inferred mineral resource category. The key assumptions, parameters and methods used to estimate the mineral resource estimate disclosed in the February 19,2020 news release are further described in the full technical report prepared by Micon International Limited (“Micon”) and BBA Inc (“BBA”), in accordance with NI 43-101 available on SEDAR (www.sedar.com) under the Corporation’s issuer profile. The Windfall gold deposit is currently one of the highest-grade resource-stage gold projects in Canada and has world-class scale. Mineralization occurs in three principal zones: Lynx, Main Zone, and Underdog. Mineralization is generally comprised of deformed sub-vertical zones plunging to the northeast. Vein-type or pyrite replacement-type styles of mineralization crosscut syn-volcanic host rocks and syn-deformation felsic porphyry intrusions and are spatially associated with the contacts of the intrusions. The deposit is well defined from surface to a depth of 1,200 metres and remains open along strike and at depth. Mineralization has been identified 30 metres from surface in some areas and as deep as 2,000 metres in others, with significant potential to extend mineralization 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% interest in the high-grade Windfall 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 Quévillon area (over 2,700 square kilometres).

 

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 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”, “potential”, “feasibility”, “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 Windfall gold deposit being one of the highest-grade resource-stage gold projects in Canada and having world-class scale; the key assumptions, parameters and methods used to estimate the mineral resource estimate; the prospects, if any, of the Windfall gold deposit; the timing and ability of Osisko, if at all, to publish a feasibility study for the Windfall gold deposit; the projected capital expenditures of mining activities at the Windfall gold deposit; upgrading an inferred mineral resource to a measured mineral resource or indicated mineral resource category; future drilling at the Windfall gold deposit; the deposit remaining open along strike to the northeast and at depth; significant high-grade zones (Lynx 4, Triple Lynx) remaining open down plunge; the plunge potential of the Lynx and Underdog zones; the significance of historic exploration activities and results. 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 and royalty interests in the Windfall 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
Chief Executive Officer
Telephone (416) 363-8653

OSISKO MINING CORPORATE UPDATE

(Toronto, September 16, 2020) Osisko Mining Inc. (OSK:TSX) (“Osisko” or the “Corporation”) is pleased to provide the following corporate update.

Mr. John Burzynski has been appointed as Chairman of the board of directors and remains in his role as Chief Executive Officer and as a director; Mr. Sean Roosen has stepped down from his role as non-executive Chairman of the board and remains in his role as a director; and Mr. Mathieu Savard has been promoted to President.

A graduate of the Université du Québec à Montréal with a bachelor’s degree in earth sciences with over 20 years’ experience in the mining industry, Mr. Savard served previously as Osisko’s Senior Vice-President Exploration.  Prior to joining Osisko Mining in 2016, Mathieu was a senior member of the Osisko Exploration James Bay, Virginia Gold and Virginia Gold Mines teams. Mathieu was a key member of the Virginia team which received the Association de l’Exploration Minière du Quebec (“AEMQ”) Prospector of the Year Award in 2004 and the PDAC’s prestigious Bill Dennis Award in 2006 for the discovery of the Eleonore gold deposit, and along with the Osisko Mining management and exploration team received the AEMQ 2017 Discovery of the Year Award, for the discovery of the Lynx deposit at Windfall.  Mathieu is a registered P.Geo.  as a member of the Ordre des Géologues du Québec and is Chairman of the board and a director of the AEMQ.

Chief Executive Officer and Chairman of the Corporation John Burzynski commented:  “I would like to thank Sean Roosen very much for his past tenure as Chairman, and for continuing in his role as a director.  I am very pleased to welcome Mathieu as the incoming President of Osisko Mining, and I look forward to him leading our team in the next stages of the work at Windfall, and to making additional discoveries in the coming years.  Our goal on the re-creation of Osisko Mining in 2015 was to discover and develop another world class gold mine in Québec.  We acquired a promising deposit, a district-scale land package, assembled one of the best exploration teams in the business, and commenced one of the world’s largest drill programs at Windfall.  Five years of persistence and hard work have paid off with the discovery of Lynx and the delineation of a world class deposit.

Osisko’s management and Board has had an unusual level of success in the Canadian mining business, leading to the last three world class gold discoveries in Québec (Windfall, Canadian Malartic, and Eleonore).  Our independent Lead Director was additionally responsible for leading the team that discovered the world class Fruta del Norte deposit in Ecuador. All this to say that at Osisko we have a strong and highly experienced Board and management team, one of the finest and most capable technical teams in the business, and one of the most proven track records of gold discovery and value creation for shareholders amongst any of our peers.  I have every confidence that Mathieu’s strong leadership skills will continue to take us to new heights.”

About Osisko Mining Inc.

Osisko is an exploration company focused on the acquisition, exploration, and development of precious metal resource properties in Québec.  Osisko holds a 100% interest in the high-grade Windfall gold deposit located between Val-d’Or and Chibougamau and holds a100% undivided interest in over 2,700 square kilometres in the surrounding Urban Barry and Quévillon area.

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

OSISKO MINING CORPORATE UPDATE

(Toronto, September 16, 2020) Osisko Mining Inc. (OSK:TSX) (“Osisko” or the “Corporation”) is pleased to provide the following corporate update.

Mr. John Burzynski has been appointed as Chairman of the board of directors and remains in his role as Chief Executive Officer and as a director; Mr. Sean Roosen has stepped down from his role as non-executive Chairman of the board and remains in his role as a director; and Mr. Mathieu Savard has been promoted to President.

A graduate of the Université du Québec à Montréal with a bachelor’s degree in earth sciences with over 20 years’ experience in the mining industry, Mr. Savard served previously as Osisko’s Senior Vice-President Exploration.  Prior to joining Osisko Mining in 2016, Mathieu was a senior member of the Osisko Exploration James Bay, Virginia Gold and Virginia Gold Mines teams. Mathieu was a key member of the Virginia team which received the Association de l’Exploration Minière du Quebec (“AEMQ”) Prospector of the Year Award in 2004 and the PDAC’s prestigious Bill Dennis Award in 2006 for the discovery of the Eleonore gold deposit, and along with the Osisko Mining management and exploration team received the AEMQ 2017 Discovery of the Year Award, for the discovery of the Lynx deposit at Windfall.  Mathieu is a registered P.Geo.  as a member of the Ordre des Géologues du Québec and is Chairman of the board and a director of the AEMQ.

Chief Executive Officer and Chairman of the Corporation John Burzynski commented:  “I would like to thank Sean Roosen very much for his past tenure as Chairman, and for continuing in his role as a director.  I am very pleased to welcome Mathieu as the incoming President of Osisko Mining, and I look forward to him leading our team in the next stages of the work at Windfall, and to making additional discoveries in the coming years.  Our goal on the re-creation of Osisko Mining in 2015 was to discover and develop another world class gold mine in Québec.  We acquired a promising deposit, a district-scale land package, assembled one of the best exploration teams in the business, and commenced one of the world’s largest drill programs at Windfall.  Five years of persistence and hard work have paid off with the discovery of Lynx and the delineation of a world class deposit.

Osisko’s management and Board has had an unusual level of success in the Canadian mining business, leading to the last three world class gold discoveries in Québec (Windfall, Canadian Malartic, and Eleonore).  Our independent Lead Director was additionally responsible for leading the team that discovered the world class Fruta del Norte deposit in Ecuador. All this to say that at Osisko we have a strong and highly experienced Board and management team, one of the finest and most capable technical teams in the business, and one of the most proven track records of gold discovery and value creation for shareholders amongst any of our peers.  I have every confidence that Mathieu’s strong leadership skills will continue to take us to new heights.”

About Osisko Mining Inc.

Osisko is an exploration company focused on the acquisition, exploration, and development of precious metal resource properties in Québec.  Osisko holds a 100% interest in the high-grade Windfall gold deposit located between Val-d’Or and Chibougamau and holds a100% undivided interest in over 2,700 square kilometres in the surrounding Urban Barry and Quévillon area.

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

OSISKO INTERSECTS 115 G/T AU OVER 5.6 METRES AT WINDFALL

(Toronto, September 1, 2020) Osisko Mining Inc. (OSK:TSX. “Osisko” or the “Corporation”) is pleased to provide new analytical results from the ongoing definition and expansion drill program at its 100% owned Windfall gold project located in the Abitibi greenstone belt, Urban Township, Eeyou Istchee James Bay, Québec.

Drilling is currently focused on the Lynx deposit, the main mineralized zones, and down plunge exploration in the central areas of the mineralized system.  Osisko President and Chief Executive Officer John Burzynski commented: “We continue to be impressed with the strong results from Lynx, and are seeing good possibilities to extend the mineralization in the known zones.  While we are focused on completing the infill drilling, the deposit continues to grow in the process.”

Infill results are presented below. Significant new analytical results from 96 intercepts in 38 new drill holes and 26 wedges include: 115 g/t Au over 5.6 metres and 25.6 g/t Au over 5.0 metres in OSK-W-20-2256-W2; 57.9 g/t Au over 3.6 metres in OSK-W-20-2139-W9; 94.4 g/t Au over 2.0 metres in WST-20-0389A; 54.4 g/t Au over 3.3 metres in OSK-W-20-2260-W2; 77.3 g/t Au over 2.3 metres in OSK-W-20-2268-W3; 42.8 g/t Au over 3.1 metresin OSK-W-20-2243-W4; 31.2 g/ Au over 4.1 metres OSK-W-20-2252-W2; 62.2 g/t Au over 2.0 metres in OSK-W-20-2299; and 47.4 g/t Au over 2.5 metres in WST-20-0471.  Maps showing hole locations and full analytical results are available at www.osiskomining.com.

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.

Osisko Intersects 76.5 g/t Au Over 5.0 Metres At Windfall

New Underdog Zone Discovered SW of Main Deposit

(Toronto, January 16, 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 57 intercepts in 32 drill holes focused on infill and expansion drilling in the Underdog area of the Main Windfall Lake deposit are presented below.

  • Drilling continues to infill zones of mineralization in Underdog through the application of the Windfall geological model
  • New mineralization has been discovered 140 metres to the southwest of previously defined Underdog zones

Highlights from the new results include: 76.5 g/t Au over 5.0 metres in OSK-W-17-1275; 29.1 g/t Au over 3.6 metres, 59.5 g/t Au over 2.1 metres, and 9.65 g/t Au over 10.4 metres in OSK-EAG-13-480; 11.9 g/t Au over 9.0 metres in OSK-W-17-1125; 24.4 g/t Au over 4.0 metres in OSK-W-17-1336;  42.9 g/t Au over 4.1 metres in OSK-W-17-13361W1; 38.7 g/t Au over 2.0 metres in OSK-W-17-1259;  22.3 g/t Au over 2.2 metres in OSK-W-17-1249;  20.4 over 2.0 metres in OSK-W-17-1239;  and 13.3 g/t Au over 3.6 metres in OSK-OBM-16-693. 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
Hole Number From
(m)
To
(m)
Interval
(m)
Au (g/t)
uncut
Au (g/t)
cut to
100 g/t
Zone Corridor
OSK-EAG-12-399 765.5 768.0 2.5 5.57   FW3U Underdog
  773.9 776.0 2.1 5.21   FW3U Underdog
OSK-EAG-13-480 643.2 646.8 3.6 29.1   FW1 Underdog
including 645.2 646.8 1.6 63.0  
  681.0 684.0 3.0 4.67   FW1 FW Underdog
including 683.0 684.0 1.0 11.8  
  722.7 725.5 2.8 4.09   FW2 Underdog
  728.0 730.0 2.0 19.5   FW2 Underdog
including 729.3 729.7 0.4 82.6  
  749.5 751.6 2.1 59.5 15.2 FW2 Underdog
including 750.7 751.0 0.3 410 100
  804.0 814.4 10.4 9.65   FW3 Underdog
including 807.5 810.4 2.9 25.5  
including 814.1 814.4 0.3 25.0  
  820.0 822.6 2.6 6.44   FW3 Underdog
including 821.4 821.7 0.3 31.5  
  911.8 914.0 2.2 7.04   FW3U Underdog
  923.0 925.0 2.0 5.90   FW3U Underdog
OSK-EAG-13-505 329.0 333.8 4.8 8.37   FW1 Underdog
including 332.0 332.8 0.8 28.8  
OSK-EAG-13-520 839.3 841.6 2.3 3.00   FW3U Underdog
OSK-OBM-16-678 599.0 601.0 2.0 3.22   FW3U Underdog
  604.0 606.2 2.2 3.16   FW3U Underdog
  619.0 621.0 2.0 7.10   FW3U Underdog
including 620.0 621.0 1.0 12.9  
OSK-OBM-16-687 749.0 751.0 2.0 3.48   FW3 HW Underdog
OSK-OBM-16-693 645.4 649.0 3.6 13.3   FW3 HW Underdog
  805.0 807.0 2.0 7.36   FW3U Underdog
including 806.0 807.0 1.0 14.2  
OSK-W-16-747 677.6 680.0 2.4 3.89   FW1 Underdog
  813.3 816.0 2.7 6.95   FW2 Underdog
including 813.3 813.7 0.4 26.2  
including 815.4 815.7 0.3 20.2  
  850.3 856.0 5.7 4.95   FW2 Underdog
including 853.0 854.8 1.8 8.53  
  911.7 914.0 2.3 3.92   FW3 Underdog
OSK-W-17-780-W1 1358.5 1360.8 2.3 6.55   FW3 HW Underdog
including 1358.5 1359.0 0.5 19.1  
  1396.5 1398.5 2.0 4.76   FW3 Underdog
OSK-W-17-866-W2 1146.7 1149.0 2.3 9.48   FW1 Underdog
including 1147.6 1148.4 0.8 26.3  
OSK-W-17-885 1018.0 1020.0 2.0 6.44   FW0 HW Underdog
OSK-W-17-885-W1 1065.0 1070.0 5.0 3.18   FW0 Underdog
OSK-W-17-1025 732.0 734.0 2.0 3.23   FW1 Underdog
  806.7 809.5 2.8 8.34   FW1 Underdog
including 806.7 807.6 0.9 20.2  
OSK-W-17-1051-W1 941.0 943.0 2.0 3.96   FW3 Underdog
  1262.0 1264.0 2.0 10.5   FW1 Underdog
OSK-W-17-1125 769.0 778.0 9.0 11.9   FW3 HW Underdog
including 769.0 771.0 2.0 21.1  
including 776.0 778.0 2.0 18.4  
  921.5 923.9 2.4 7.32   VNCR Underdog
including 922.1 922.6 0.5 30.1  
OSK-W-17-1125-W3 900.8 903.0 2.2 3.85   Vein Underdog
including 901.1 901.4 0.3 14.0  
OSK-W-17-1139 785.0 787.2 2.2 11.1   FW2 Underdog
including 785.3 785.8 0.5 47.0  
  888.0 890.0 2.0 6.53   FW3 Underdog
including 889.1 889.6 0.5 24.5  
  1007.0 1009.8 2.8 5.43   FW4 Underdog
including 1009.2 1009.8 0.6 21.9  
OSK-W-17-1208 440.0 442.0 2.0 3.21   Vein Underdog
including 441.0 442.0 1.0 6.41  
OSK-W-17-1239 728.0 730.0 2.0 20.4   FW3U HW Underdog
  759.0 761.0 2.0 5.40   FW3U HW Underdog
including 759.0 760.0 1.0 10.3  
OSK-W-17-1259 364.0 366.0 2.0 38.7   FW4 Underdog
including 365.0 366.0 1.0 77.1  
OSK-W-17-1275 844.0 849.0 5.0 76.5 59.9 FW3U Underdog
including 845.4 846.0 0.6 148 100
including 846.9 847.8 0.9 160 100
OSK-W-17-1287 231.9 234.0 2.1 9.63   QTV Underdog
including 233.1 234.0 0.9 22.4  
OSK-W-17-1295 696.9 699.2 2.3 8.14   New Zone Underdog
including 697.7 698.5 0.8 20.9  
OSK-W-17-1305 722.9 725.5 2.6 14.5   FW3U HW Underdog
including 722.9 723.2 0.3 51.6  
OSK-W-17-1305-W1 858.5 861.0 2.5 14.8   VNCR Underdog
including 860.3 861.0 0.7 47.0  
OSK-W-17-1325 629.2 631.3 2.1 7.57   New Zone Underdog
OSK-W-17-1336 816.0 820.0 4.0 24.0   FW0 Underdog
including 817.5 820.0 2.5 35.6  
  891.0 893.0 2.0 6.64   FW1 Underdog
including 891.0 891.3 0.3 22.3  
  1082.0 1084.5 2.5 15.0   FW3 Underdog
including 1084.0 1084.5 0.5 67.9  
OSK-W-17-1336-W1 992.9 995.0 2.1 42.9 28.8 FW1 Underdog
including 992.9 993.5 0.6 150 100
OSK-W-17-1353 233.9 236.3 2.4 4.66   FW3 Underdog
including 234.5 235.0 0.5 20.1  
OSK-W-17-1354 229.3 231.4 2.1 5.05   FW3 Underdog
including 229.6 230.0 0.4 22.9  
OSK-W-17-1362 337.9 339.9 2.0 4.48   FW4 Underdog
including 339.4 339.9 0.5 15.3  
OSK-W-17-1374 504.0 508.0 4.0 4.84   FW1 Underdog
  526.1 530.0 3.9 3.04   FW1 Underdog

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 Foot Wall, VNCR = Crustiform Vein, QTV: quartz tourmaline vein
Hole Number Azimuth (°) Dip (°) Length (m) UTM E UTM N Section
OSK-EAG-12-399 328 -56 795 452584 5434701 2700
OSK-EAG-13-480 331 -57 991 452400 5434486 2450
OSK-EAG-13-505 330 -51 852 451930 5434493 2025
OSK-EAG-13-520 330 -55 872 452568 5434633 2650
OSK-OBM-16-678 330 -53 717 452347 5434661 2475
OSK-OBM-16-687 330 -56 882 452476 5434592 2550
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-17-866-W2 332 -57 1332 452633 5434280 2525
OSK-W-17-885 335 -67 1458 452861 5434494 2850
OSK-W-17-885-W1 335 -67 1383 452861 5434494 2850
OSK-W-17-1025 330 -58 990 452486 5434439 2475
OSK-W-17-1125 331 -58 975 452563 5434568 2625
OSK-W-17-1125-W3 331 -58 1086 452563 5434568 2625
OSK-W-17-1139 333 -56 1092 452473 5434470 2500
OSK-W-17-1208 331 -56 519 451612 5434444 1725
OSK-W-17-1239 326 -53 939 452419 5434554 2475
OSK-W-17-1259 332 -54 414 451520 5434378 1600
OSK-W-17-1275 331 -55 912 452499 5434592 2575
OSK-W-17-1287 332 -54 743 451531 5434331 1600
OSK-W-17-1295 334 57 801 451559 5434288 1600
OSK-W-17-1305 330 -54 888 452499 5434592 2575
OSK-W-17-1305-W1 330 -54 951 452499 5434592 2575
OSK-W-17-1325 331 -69 689 451431 5434333 1500
OSK-W-17-1336 335 -61 1149 452616 5434449 2600
OSK-W-17-1336-W1 335 -61 1335 452616 5434449 2600
OSK-W-17-1353 326 -56 750 451490 5434337 1575
OSK-W-17-1354 333 -50 432 451642 5434469 1775
OSK-W-17-1362 347 -50 624 451642 5434470 1750
OSK-W-17-1374 317 -59 873 452273 5434579 2375

 

OSK-EAG-12-399 intersected FW3U with 5.57 g/t Au over 2.5 metres and 5.21 g/t Au over 2.1 metres. Mineralization is composed of 7% disseminated pyrite in a strongly sericitized andesite at the contact with a moderately sericitized felsic porphyritic dike.

OSK-EAG-13-480 intersected nine intervals: 29.1 g/t Au over 3.6 metres related to FW1, 4.67 g/t Au over 3.0 metres in FW1 FW, 4.09 g/t Au over 2.8 metres, 19.5 g/t Au over 2.0 metres, 59.5 g/t Au over 2.1 metres in FW2, 9.65 g/t Au over 10.4 metres, 6.44 g/t Au over 2.6 metres in FW3 and 7.04 g/t Au over 2.2 metres, 5.90 g/t au over 2.0 metres in FW3U.  The first interval is composed of up to 7% pyrite stringers, local visible gold, disseminated pyrite, chalcopyrite and sphalerite with local tourmaline ptygmatic veins hosted in a porphyriticc felsic dike. Moderate sericitization and pervasive silica flooding are present. The second interval is composed of 1% pyrite stringers and traces of disseminated pyrite in a sericitized porphyritic felsic dike. The three intervals in FW2 are composed of 1% pyrite stringers, 2% disseminated pyrite in pervasive silica flooding, hosted in a sericitized porphyritic felsic dike with fuchsite. The sixth and seventh intervals in FW3 are composed of up to 10% pyrite associated withlocal pervasive silica flooding within a silicified and moderately sericitized porphyritic felsic dike with fuchsite. The eighth and ninth intervals in FW3U, are composed of 1% pyrite stringers, 2% pyrite in pervasive silica flooding within a strongly silicified and sericitized porphyritic felsic dike.

OSK-EAG-13-505 intersected 8.37 g/t Au over 4.8 metres in FW1. The mmineralization is composed of 5% pyrite stringers and traces of tourmaline ptygmatic veinlets within a strongly silicified porphyritic felsic dike with moderate sericite and fuchsite alteration.

OSK-EAG-13-520 intersected 3.00 g/t Au over 2.3 metres in F3WU. Mineralization is composed of 4% disseminated pyrite in a bleached andesite.

OSK-OBM-16-678 intersected 3.22 g/t Au over 2.0 metres, 3.16 g/t Au over 2.2 metres and 7.10 g/t Au over 2.0 metres in FW3U. Mineralisation is composed of up to 10% disseminated pyrite and 5% pyrite stringers hosted in andesite or porphyritic felsic volcanic with strong sericite and weak silica alteration.

OSK-OBM-16-687 intersected 3.48 g/t au over 2.0 metres in FW3 HW. Mineralization is composed of 5% pyrite stringers and 1% ptygmatic tourmaline veins hosted in a fragmental felsic intrusive unit.

OSK-OBM-16-693 intersected 13.3 g/t Au over 3.6 metres and 7.36 g/t Au over 2.0 metres. The first interval is in FW3 HW and composed of trace disseminated or stringer pyrite, locally 30% massive pyrite, with intense pervasive silica flooding hosted in a strongly sericitized porphyric felsic dike. The second interval is related to FW3U and composed of 12% pyrite stringers and 4% disseminated pyrite in a sericitized andesite.

OSK-W-16-747 intersected 3.89 g/t au over 2.4 metres, 6.95 g/t Au over 2.7 metres, 4.95 g/t Au over 5.7 metres and 3.92 g/t Au over 2.3 metres. The first interval in FW1 and composed of 1% of pyrite stringers, 1% pyrite in smoky quartz veins and 2% semi-massive pyrite in sericitized and silicified porphyritic felsic dike. The second and third intervals are related to FW2 and composed of local zones with semi-massive pyrite associated with pervasive silica flooding, local visible gold, and up to 2% pyrite clusters hosted in a moderately sericitized felsic porphyritic dike. The fourth interval is related to FW3U and composed of 7% pyrite stringers in a sericitized porphyritic felsic volcanic with tourmaline and quartz-tourmaline veinlets.

OSK-W-17-780-W1 intersected 6.55 g/t Au over 2.3 metres in FW3 HW and 4.76 g/t Au over 2.0 metres in FW3. Mineralization is composed of 2% pyrite stringers in a strongly sericitized and moderately silicified porphyritic felsic dike.

OSK-W-17-866-W2 intersected FW1 returning 9.48 g/t Au over 2.3 metres. Mineralization is composed of trace disseminated or stringer pyrite hosted in a weakly sericitized and silicified porphyritic felsic dike.

OSK-W-17-885 intersected 6.44 g/t Au over 2.0 metres in FW0 HW. Mineralization is composed of 2% disseminated pyrite in a weakly sericitized an silicified porphyritic felsic dike.

OSK-W-17-885-W1 intersected 3.18 g/t Au over 5.0 metres in FW0. Mineralization is composed of 3% pyrite-tourmaline stringers and 1% pyrite associated with pervasive silica flooding within a fragmental felsic dike.

OSK-W-17-1025 intersected FW1 returning 3.23 g/t Au over 2.0 metres and 8.34 g/t Au over 2.8 metres. The first interval is composed of 4% disseminated and stringer pyrite hosted in a sericitized felsic intrusion. The second interval is composed of 6% pyrite-tourmaline stringers and hosted in the same felsic intrusion.

OSK-W-17-1051-W1 intersected 3.96 g/t Au over 2.0 metres in FW3 and 10.5 g/t Au over 2.0 metres in FW1. Mineralization is composed of traces of pyrite stringers or clusters in a weakly sericitized and silicified porphyritic felsic dike.

OSK-W-17-1125 intersected 11.9 g/t Au over 9.0 metres and 7.32 g/t Au over 2.4 metres. The first interval is in FW3 HW and composed of 3% pyrite stringers in a sericitized porphyritic felsic dike at the contact with a bleached mafic volcanic unit. The second interval is composed of a metre-scale crustiform vein with 25% pyrite stringers hosted in a sericitized gabbro containing 15% disseminated pyrite.

OSK-W-17-1125-W3 intersected 3.85 g/t Au over 2.2 metres in a crustiform vein. The mineralization is within a sericitized felsic dike with carbonate alteration and 15% pyrite as clusters or in quartz-tourmaline veins.

OSK-W-17-1139 intersected three intervals: 11.1 g/t Au 2.2 metres, 6.53 g/t Au over 2.0 metres and 5.43 g/t Au over 2.8 metres. The first interval is in FW2 and composed of 1% pyrite in pervasive silica flooding and 2% pyrite stringers at the contact between two bleached felsic intrusive units with strong silica, sericite and fuchsite alteration. The second interval, in F3W, is a felsic porphyritic dike with moderate sericite, silica, and fuchsite alteration with 2% pyrite stringers and 1% pyrite in smoky quartz veins. The third interval is in FW4 and composed of 8% stringers, 5% disseminated pyrite, 1% tourmaline-pyrite veins and crustiform veins in a moderately chloritized, strongly bleached gabbro at the contact with a felsic dike.

OSK-W-17-1208 intersected 3.21 g/t Au over 2.0 metres. The mineralization is composed of 2% disseminated or clustered pyrite in a quartz vein hosted in a chloritized and strongly sericitized felsic porphyritic dike with fuchsite alteration.

OSK-W-17-1239 intersected 20.4 g/t Au over 2.0 metres and 5.4 g/t au over 2.0 metres in FW3U HW. The mineralization is composed of to up to 4% pyrite stringers in a strongly sericitized and strongly silicified felsic dyke.

OSK-W-17-1259 intersected FW4 zone returning 38.7 g/t Au over 2.0 metres. Mineralization is composed of 1% pyrite stringers and 2% semi-massive pyrite within a sericitized felsic porphyritic dike.

OSK-W-17-1275 intersected 76.5 g/t over 5.0 metres. The mineralization is composed of 10% disseminated pyrite and 2% pyrite stringers in a strongly silicified and sericitized andesite.

OSK-W-17-1287 intersected 9.63 g/t Au over 2.1 metres in a quartz vein. Mineralization is composed of 3% disseminated chalcopyrite, and 2% disseminated pyrite associated with ptygmatic quartz-tourmaline veins, hosted in a porphyritic felsic dike.

OSK-W-17-1295 intersected 8.14 g/t Au over 2.3 metres in a new zone. Mineralization is composed of up to 20% semi-massive pyrite and 1% disseminated chalcopyrite within a strongly sericitized and chloritized andesite. The mineralization is at the contact with a porphyritic felsic dike. This new zone is in the western area of the Underdog corridor, 140 metres south-west of OSK-W-17-1325 (7.57 g/t Au over 2.1 metre, this press release).

OSK-W-17-1305 intersected 14.5 g/t Au over 2.6 metres. The interval is related to FW3 upper zone and is composed of up to 1% pyrite stringers. The mineralization is at the contact between a porphyritic felsic dike and an andesite.

OSK-W-17-1305-W1 intersected 14.8 g/t Au over 2.5 metres. The mineralization is associated with a crustiform quartz vein and composed of 6% disseminated pyrite and 5% pyrite stringers in a moderately silicified andesite.

OSK-W-17-1325 intersected 7.57g/t Au over 2.1 metres. The mineralization is composed of 10% pyrite stringers with trace disseminated tourmaline hosted in a bleached intermediate volcanic unit.

OSK-W-17-1336 intersected 24.0 g/t Au over 4.0 metres, 6.64 g/t Au over 2.0 metres and 15.0g/t Au over 2.5 metres. The first interval is in FW0 and composed of 5% pyrite stringers with tourmaline, 2% disseminated pyrite, and 2% tourmaline ptygmatic veins hosted in a moderately silicified porphyritic felsic dike. The second interval is in FW1 and composed of 5% pyrite stringers and 2% disseminated pyrite, hosted in silicified porphyritic felsic dike. The third interval, in FW3, is composed of 4% pyrite stringers, 1% disseminated pyrite within silica flooding. Local visible gold is observed in association with the pyrite stringers.

OSK-W-17-1336-W1 intersected 42.9 g/t Au over 2.1 metres in FW1. Mineralization is composed of local visible gold, up to 20% pyrite clusters and up to 5% disseminated pyrite in a moderately silicified and weakly sericitized felsic dike.

OSK-W-17-1353 intersected 4.66 g/t Au over 2.4 metres. Mineralization is in FW3 and is composed of 5% pyrite in pervasive silica flooding with traces of pyrite-tourmaline stringers in a silicified and weakly sericitized porphyritic felsic dike.

OSK-W-17-1354 intersected 5.05 g/t Au over 2.1 metres in FW3. 10% semi-massive mineralized horizons with 4% pyrite stringers, 2% pyrite-tourmaline stringers are hosted in a strongly sericitized fragmental felsic dike.

OSK-W-17-1362 intersected 4.48 g/t Au over 2.0 metres in FW4. Mineralization is composed of 10% pyrite with tourmaline ptygmatic veins hosted in a silicified porphyritic felsic dike.

OSK-W-17-1374 intersected 4.84 g/t Au over 4.0 metres and 3.04 g/t Au over 3.9 metres. The first interval is in FW1 and composed of up 10% pyrite and pyrite-tourmaline stringers in a bleached porphyritic felsic dike. The second interval is also in FW1 and composed of up to 5% pyrite and pyrite-tourmaline stringers at a bleached contact between two porphyritic 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 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”, “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