Osisko Announces TSX Approval Of Normal Course Issuer Bid

(Toronto, December 21, 2017) Osisko Mining Inc. (TSX:OSK) (the “Corporation” or “Osisko“) today announces that the Toronto Stock Exchange (the “TSX“) has approved the Corporations notice of intention to make a normal course issuer bid (the “NCIB Program“). Under the terms of the NCIB Program, Osisko may acquire up to 15,204,587 of its common shares (“Common Shares“) from time to time in accordance with the normal course issuer bid procedures of the TSX. Any repurchases under the NCIB Program will be made in Canada through the facilities of the TSX.

Repurchases under the NCIB Program may commence on December 29, 2017 and will terminate on December 28, 2018 or on such earlier date as the NCIB Program is complete. Purchases of Common Shares under the NCIB Program will be made in Canada through the facilities of the TSX in accordance with its rules. Daily purchases will be limited to 162,895 Common Shares, other than block purchase exemptions, representing 25% of the average daily trading volume of the Common Shares on the TSX for the six month period ending November 30, 2017, being 651,581 Common Shares.

The price that the Corporation may pay for any Common Shares purchased under the NCIB Program will be the prevailing market price at the time of purchase and any Common Shares purchased by the Corporation will be cancelled.  The board of directors of Osisko believes that the underlying value of the Corporation may not be reflected in the market price of the Common Shares from time to time and that, accordingly, the purchase of Common Shares will increase the proportionate interest in the Corporation of, and be advantageous to, all remaining shareholders of the Corporation.

As of December 18, 2017, there were 207,586,907 Common Shares issued and outstanding. The 15,204,587 Common Shares that may be repurchased under the NCIB Program represent approximately 10% of the public float of the Corporation as of December 18, 2017, being 152,045,876 Common Shares.

Osisko has appointed BMO Nesbitt Burns Inc. to make any purchases under the NCIB Program on its behalf.

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.

Forward-looking statements

This press release contains forward-looking statements. These forward-looking statements, by their nature, require the Corporation to make certain assumptions and necessarily involve known and unknown risks and uncertainties that could cause actual results to differ materially from those expressed or implied in these forward-looking statements. Words such as “may”, “will”, “would”, “could”, “expect”, “believe”, “plan”, “anticipate”, “intend”, “estimate”, “continue”, or the negative or comparable terminology, as well as terms usually used in the future and the conditional, are intended to identify forward-looking statements including the fact that the Corporation “expects”, “plans”, “anticipates”, “believes”, “intends”, “estimates”, “projects”, “potential”, “scheduled” and similar expressions or variations (including negative variations), or that events or conditions “will”, “would”, “may”, “could” or “should” occur including, without limitation, statements about the board of directors of Osiskos belief that the NCIB Program is advantageous to shareholders and that underlying value of the Corporation may not be reflected in the market price of the Common Shares, the Corporations intentions regarding the NCIB Program and whether the Corporation will receive the requisite acceptance of the TSX in respect of the NCIB Program. Although Osisko believes the expectations expressed in such forward-looking statements are based on reasonable assumptions, such statements involve known and unknown risks, uncertainties and other factors and are not guarantees of future performance and actual results may accordingly differ materially from those in forward looking statements. Factors that could cause the actual results to differ materially from those in forward-looking statements include, without limitation: fluctuations in the prices of the commodities; fluctuations in the value of the Canadian dollar relative to the U.S. dollar; regulatory changes by national and local government, including corporate law, permitting and licensing regimes and taxation policies; continued availability of capital and financing and general economic, market or business conditions; business opportunities that become available to, or are pursued by Osisko; other uninsured risks. The forward looking statements contained in this press release are based upon assumptions management believes to be reasonable, including, without limitation: 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 Osisko Mining Inc.:

John Burzynski
President and Chief Executive Officer
Telephone: (416) 363-8653

Osisko Announces Intention to Implement Normal Course Issuer Bid

(Toronto, December 19, 2017) Osisko Mining Inc. (TSX:OSK) (the “Corporation” or “Osisko“) today announces its intention to implement a normal course issuer bid program to purchase for cancellation, from time to time over a 12-month period, common shares of the Corporation (“Common Shares“) listed on the Toronto Stock Exchange (“TSX“) in an aggregate amount of up to 10% of the public float of the Corporation (the “NCIB Program“). The commencement of the NCIB Program is subject to TSX approval.

Any repurchases under the NCIB Program will be made in Canada through the facilities of the TSX. Osisko will pay the prevailing market price at the time of purchase. The actual number of Common Shares repurchased under the NCIB Program and the timing of such repurchases will be at Osiskos discretion and shall be subject to the limitations set out in the TSX Company Manual.

The board of directors of Osisko believes that the underlying value of the Corporation may not be reflected in the market price of the Common Shares from time to time and that, accordingly, the purchase of Common Shares will increase the proportionate interest in the Corporation of, and be advantageous to, all remaining shareholders of the Corporation.

As of December 18, 2017, there were 207,586,907 Common Shares issued and outstanding, and the Corporation had a public float of 152,045,876 Common Shares.

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.

Forward-looking statements

This press release contains forward-looking statements. These forward-looking statements, by their nature, require the Corporation to make certain assumptions and necessarily involve known and unknown risks and uncertainties that could cause actual results to differ materially from those expressed or implied in these forward-looking statements. Words such as “may”, “will”, “would”, “could”, “expect”, “believe”, “plan”, “anticipate”, “intend”, “estimate”, “continue”, or the negative or comparable terminology, as well as terms usually used in the future and the conditional, are intended to identify forward-looking statements including the fact that the Corporation “expects”, “plans”, “anticipates”, “believes”, “intends”, “estimates”, “projects”, “potential”, “scheduled” and similar expressions or variations (including negative variations), or that events or conditions “will”, “would”, “may”, “could” or “should” occur including, without limitation, statements about the board of directors of Osiskos belief that the NCIB Program is advantageous to shareholders and that underlying value of the Corporation may not be reflected in the market price of the Common Shares, the Corporations intentions regarding the NCIB Program and whether the Corporation will receive the requisite acceptance of the TSX in respect of the NCIB Program. Although Osisko believes the expectations expressed in such forward-looking statements are based on reasonable assumptions, such statements involve known and unknown risks, uncertainties and other factors and are not guarantees of future performance and actual results may accordingly differ materially from those in forward looking statements. Factors that could cause the actual results to differ materially from those in forward-looking statements include, without limitation: fluctuations in the prices of the commodities; fluctuations in the value of the Canadian dollar relative to the U.S. dollar; regulatory changes by national and local government, including corporate law, permitting and licensing regimes and taxation policies; continued availability of capital and financing and general economic, market or business conditions; business opportunities that become available to, or are pursued by Osisko; other uninsured risks. The forward looking statements contained in this press release are based upon assumptions management believes to be reasonable, including, without limitation: 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 Osisko Mining Inc.:

John Burzynski
President and Chief Executive Officer
Telephone: (416) 363-8653

Osisko Commences Drill Program At Osborne-Bell

(Toronto, December 14, 2017)  Osisko Mining Inc. (OSK:TSX. “Osisko” or the “Corporation”) is pleased to announce it has commenced drilling with two drill rigs on its 100% owned Osborne-Bell gold deposit located in the Abitibi greenstone belt, Quévillon Township, Eeyou Istchee James Bay Region, Québec. Located 17 kilometres northwest of the town of Lebel-sur-Quévillon and 112 kilometres west of the Windfall Lake gold deposit, Osborne-Bell is part of Osiskos Quévillon Project, which consists of a 2160 square kilometer land package hosting approximately thirty known gold showings.  A map showing the location of the deposit and project is posted on our website at www.osiskomining.com.

The 50,000 metre drill program will re-evaluate the historical Osborne-Bell resource, and test regional exploration targets on the Quévillon Project.  The Osborne-Bell deposit has seen significant historical drilling, which Osisko intends to re-log as part of the ongoing program.

The Company is also currently completing a 27,000 kilometre high-definition magnetic survey and 5,400 kilometre V-TEM airborne survey over the Quévillon Project.

Qualified Person
The scientific and technical content of this news release has been reviewed, prepared and approved by Mr. Mathieu Savard, B.Sc., P.Geo. (OGQ 510), Vice President Exploration – Québec, who is a “qualified person” as defined by National Instrument 43-101 – Standards of Disclosure for Mineral Projects (“NI 43-101”).

About the Osborne-Bell Gold Deposit
The Osborne-Bell gold deposit is located 15 km north-west of Lebel-sur-Quevillon and 115 km to the west of the Windfall Lake gold deposit. A resource estimate was completed by Maudore Minerals Ltd on the Osborne-Bell gold deposit on October 26, 2012 (see press release on October 29, 2012 at www.sedar.com) which refers to an indicated mineral resource of 8,463,800 Tonnes at 2.0 g/t Au for 546,299 oz and an inferred mineral resource of 8,115,800 Tonnes at 4.8 g/t Au for 1,258,990 oz. During the acquisition of the Osborne-Bell gold deposit from Deloitte Restructuring in March 2017, Osisko had access to confidential information indicating that the historic mineral resource estimate for the Osborne-Bell gold deposit could possibly be significantly reduced. Osisko intends to explore the Quevillon project and unlock the potential of the newly acquired Quevillon project as well as the Osborne-Bell gold deposit.

For further details regarding the 2012 mineral resource estimate, key assumptions, parameters and methods used to estimate the mineral resources presented in respect of the Osborne-Bell Gold Deposit of the Comtois Property, please see the ” 43-101 Technical Report and Mineral Resource Estimate – Osbell Deposit, Comtois Property”, dated effective date October 26, 2012 and filed on SEDAR on December 7, 2012 under the issuer profile of Maudore Minerals Ltd at www.sedar.com.

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 Osborne-Bell gold deposit and Quévillon project; the current 50,000 metres drill program; the significance of results from the ongoing drill program at the Quévillon project; the significance of the thirty known gold showings, if any; the significance of the high-definition magnetic survey and V-TEM airborne survey over the Quévillon Project, if any; the type of drilling included in the drill program; potential mineralization; the ability to realize upon any mineralization in a manner that is economic; the ability to complete any proposed exploration activities and the results of such activities; and any other information herein that is not a historical fact may be “forward-looking information”. Any statement that involves discussions with respect to predictions, expectations, interpretations, beliefs, plans, projections, objectives, assumptions, future events or performance (often but not always using phrases such as “expects”, or “does not expect”, “is expected”, “interpreted”, “managements view”, “anticipates” or “does not anticipate”, “plans”, “budget”, “scheduled”, “forecasts”, “estimates”, “believes” or “intends” or variations of such words and phrases or stating that certain actions, events or results “may” or “could”, “would”, “might” or “will” be taken to occur or be achieved) are not statements of historical fact and may be forward-looking information and are intended to identify forward-looking information. This forward-looking information is based on reasonable assumptions and estimates of management of the Corporation at the time it was made. This 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, high-definition magnetic surveys and V-TEM airborne surveys) to accurately predict mineralization; errors in managements geological modelling; the ability of Osisko to complete further exploration activities, including drilling; property interests in the Osborne-Bell gold deposit and Windfall Lake gold project; the results of exploration activities; risks relating to mining activities; the global economic climate; metal prices; dilution; environmental risks; and community and non-governmental actions. Although the forward-looking information contained in this news release is based upon what management believes, or believed at the time, to be reasonable assumptions, Osisko cannot assure shareholders and prospective purchasers of securities of the Corporation that actual results will be consistent with such forward-looking information, as there may be other factors that cause results not to be as anticipated, estimated or intended, and neither Osisko nor any other person assumes responsibility for the accuracy and completeness of any such forward-looking information. Osisko does not undertake, and assumes no obligation, to update or revise any such forward-looking statements or forward-looking information contained herein to reflect new events or circumstances, except as may be required by law.

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

Osisko Mining Closes “Bought Deal” Private Placement Of Flow Through Shares For Ontario Properties

(Toronto, December 12, 2017) – Osisko Mining Inc. (TSX:OSK) (“Osisko” or the “Corporation”) is pleased to announce, that it has completed a “bought deal” brokered private placement of an aggregate 479,550 common shares of the Corporation that will qualify as “flow-through shares” (within the meaning of subsection 66(15) of the Income Tax Act (Canada)) (“Flow-Through Shares”), at an issue price of $4.80 per Common Share for aggregate gross proceeds of approximately $2.3 million (the “Offering”). Canaccord Genuity Corp. acted as sole underwriter and sole bookrunner in connection with the Offering.

The gross proceeds from the sale of Flow-Through Shares will be used to fund “Canadian exploration expenses” (within the meaning of the Income Tax Act (Canada)) related to Osiskos projects in Ontario on or prior to December 31, 2018 for renunciation to subscribers of Flow-Through Shares effective December 31, 2017.

All securities issued under the Offering will be subject to a hold period expiring four months and one day from the date hereof. The securities offered have not been registered under the U.S. Securities Act of 1933, as amended, and may not be offered or sold in the United States absent registration or an applicable exemption from the registration requirements. This press release shall not constitute an offer to sell or the solicitation of an offer to buy nor shall there be any sale of the securities in any State in which such offer, solicitation or sale would be unlawful.

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 applicable Canadian securities legislation based on expectations, estimates and projections as at the date of this news release. Forward-looking information involves risks, uncertainties and other factors that could cause actual events, results, performance, prospects and opportunities to differ materially from those expressed or implied by such forward-looking information. Forward-looking information in this news release includes, but is not limited to, the use of proceeds of the Offering; the timing and ability of the Corporation, if at all, to obtain final approval of the Offering from the Toronto Stock Exchange; objectives, goals or future plans; statements regarding exploration results and exploration plans. Factors that could cause actual results to differ materially from such forward-looking information include, but are not limited to, capital and operating costs varying significantly from estimates; the preliminary nature of metallurgical test results; delays in obtaining or failures to obtain required governmental, environmental or other project approvals; uncertainties relating to the availability and costs of financing needed in the future; changes in equity markets; inflation; fluctuations in commodity prices; delays in the development of projects; the other risks involved in the mineral exploration and development industry; and those risks set out in the Corporations public documents filed on SEDAR at www.sedar.com. Although the Corporation believes that the assumptions and factors used in preparing the forward-looking information in this news release are reasonable, undue reliance should not be placed on such information, which only applies as of the date of this news release, and no assurance can be given that such events will occur in the disclosed time frames or at all. The Corporation disclaims any intention or obligation to update or revise any forward-looking information, whether as a result of new information, future events or otherwise, other than as required by law.

For further information please contact:

John Burzynski
President and Chief Executive Officer
Telephone: (416) 363-8653

Osisko Intersects 30 g/t Au Over 2.4 Metres At Windfall

(Toronto, December 5, 2017)  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 52 intercepts in 40 drill holes focused on infill and expansion drilling in the Underdog, Caribou, Zone 27 and Mallard corridors of the Windfall deposit are presented below.

Highlights from the new results include: 30 g/t Au over 2.4 metres, in OSK-W-17-1141; 10.2 g/t Au over 5.4 metres in OSK-W-17-1125, 26.0 g/t Au over 2.2 metres in OSK-W-17-1125-W3 and 5.38 g/t Au over 9.0 metres in OSK-W-17-1186. 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-17-885-W2 1199.0 1201.0 2.0 10.8   FW0 FW Underdog
including 1199.0 1200.0 1.0 21.3  
OSK-W-17-935 80.0 82.8 2.8 3.34   Mallard HW Mallard
including 82.0 82.8 0.8 9.71  
OSK-W-17-1013 9.2 12.0 2.8 4.56   27 Zone 27
including 9.6 10.1 0.5 24.9  
OSK-W-17-1025 94.9 96.9 2.0 4.17   TBD Caribou
OSK-W-17-1026 83.6 85.9 2.3 4.93   27 infill Zone 27
including 85.0 85.9 0.9 12.4  
  92.7 95.9 3.2 4.38   27 infill Zone 27
including 94.8 95.9 1.1 11.2  
OSK-W-17-1028 727.5 729.5 2.0 6.77   Caribou Extn Caribou
OSK-W-17-1042 84.0 86.3 2.3 3.53   27 infill Zone 27
OSK-W-17-1050 39.7 41.7 2.0 11.2   Z27 Zone 27
OSK-W-17-1065 31.9 34.2 2.3 3.28   Mallard 2 Mallard
OSK-W-17-1066 214.5 216.5 2.0 4.21   Vein Caribou
OSK-W-17-1095 113.0 116.0 3.0 4.09   27 infill Zone 27
OSK-W-17-1105 468.0 470.0 2.0 3.42   New TBD
including 468.0 469.0 1.0 6.71  
  772.0 774.0 2.0 4.49   27 Zone 27
including 772.3 772.9 0.6 14.5  
OSK-W-17-1125 753.6 759.0 5.4 10.2   FW2 Underdog
including 755.9 757.2 1.3 36.3  
OSK-W-17-1125-W3 516.8 519.0 2.2 26.0   Wolf HW Caribou
including 517.5 518.2 0.7 80.5  
OSK-W-17-1139 520.0 523.4 3.4 4.87   CN1 FW Caribou
including 521.6 521.9 0.3 19.8  
OSK-W-17-1140 937.3 942.0 4.7 3.56   27 Zone 27
OSK-W-17-1141 59.4 61.8 2.4 30.0   27 infill Zone 27
including 59.4 61.0 1.6 44.7  
  71.7 74.0 2.3 8.04   27 infill Zone 27
including 73.4 74.0 0.6 28.0  
OSK-W-17-1142 142.0 144.0 2.0 3.07   27 HW infill Zone 27
OSK-W-17-1147-W1 798.0 800.4 2.4 3.36   TBD Shear 
  909.0 911.0 2.0 3.94   TBD Caribou
OSK-W-17-1152 367.0 369.0 2.0 5.67   FW1 Underdog
including 368.0 368.6 0.6 16.6  
OSK-W-17-1155 327.0 329.7 2.7 3.64   VNCR Mallard
including 329.0 329.7 0.7 12.9  
OSK-W-17-1158 596.0 598.4 2.4 4.12   Caribou Extn Caribou
including 597.0 597.8 0.8 10.6  
OSK-W-17-1168 544.0 546.6 2.6 3.99   VNCR Caribou
including 546.0 546.6 0.6 15.4  
OSK-W-17-1179 742.8 745.5 2.7 4.56   New Underdog
including 742.8 743.7 0.9 11.6  
OSK-W-17-1186 228.0 237.0 9.0 5.38   Caribou Caribou
including 229.1 229.6 0.5 28.4  
including 236.0 237.0 1.0 23.6  
  863.0 866.0 3.0 15.7   FW3U Underdog
including 863.0 864.6 1.6 27.5  
OSK-W-17-1188 147.5 149.9 2.4 3.09   27 Zone 27
including 148.9 149.9 1.0 6.97  
  167.8 169.8 2.0 3.28   27 infill Zone 27
OSK-W-17-1196 155.5 158.0 2.5 3.26   27 infill Zone 27
OSK-W-17-1209 236.4 239.2 2.8 4.68   FW4 Underdog
including 236.4 237.1 0.7 17.2  
OSK-W-17-1212 215.0 217.0 2.0 6.87   Mallard Mallard
including 216.0 217.0 1.0 13.2  
OSK-W-17-1220 197.7 202.0 4.3 4.63   27 infill Zone 27
OSK-W-17-1221 707.4 709.4 2.0 7.28   Caribou 1 Caribou
including 707.4 708.0 0.6 23.7  
  715.8 719.7 3.9 3.45   Caribou 1 Caribou
OSK-W-17-1224 70.3 73.1 2.8 15.7   Mallard 2 Mallard
including 72.7 73.1 0.4 44.2  
OSK-W-17-1226 743.4 746.2 2.8 3.43   Caribou Extn Caribou
including 743.4 744.0 0.6 8.96  
  765.0 767.0 2.0 3.78   Caribou Extn Caribou
including 765.0 765.6 0.6 11.6  
  852.7 855.0 2.3 3.42   CN2 Caribou
OSK-W-17-1227 419.9 422.0 2.1 4.37   Vein Caribou
including 420.4 421.1 0.7 12.9  
  619.0 621.0 2.0 3.62   New TDB
OSK-W-17-1228 50.7 53.0 2.3 7.59   Vein Underdog
OSK-W-17-1232 149.0 151.5 2.5 5.50   27 infill Zone 27
  183.0 186.0 3.0 3.99   27 infill Zone 27
OSK-W-17-1243 99.6 101.6 2.0 5.23   27 infill Zone 27
including 101.0 101.6 0.6 13.6  
OSK-W-17-1246 34.5 39.9 5.4 5.62   27 HW infill Zone 27
OSK-W-17-1252 18.5 21.0 2.5 3.55   Mallard Mallard
including 19.3 20.3 1.0 8.74  
OSK-W-17-1253 43.0 47.3 4.3 4.88   27 Z27
  56.0 59.0 3.0 3.68   27 Z27

Notes:

  1. True widths are estimated at 65 – 80% of the reported core length interval.  See “Quality Control” below.
  2. Definitions: FW = Foot Wall, HW = Hanging Wall, VNCR = Crustiform vein
Hole Number Azimuth (°) Dip (°) Length (m) UTM E UTM N Section
OSK-W-17-885-W2 334 -69 1229 452861 5434494 2850
OSK-W-17-935 327 -51 474 452025 5434827 2275
OSK-W-17-1013 333 -48 24 452246 5434866 2475
OSK-W-17-1025 330 -58 990 452486 5434439 2475
OSK-W-17-1026 129 -45 147 452119 5434787 2325
OSK-W-17-1028 326 -59 807 452860 5434814 3000
OSK-W-17-1042 146 -52 156 452119 5434786 2325
OSK-W-17-1050 148 -49 106 452053 5434749 2250
OSK-W-17-1065 334 -56 330 452290 5434903 2550
OSK-W-17-1066 332 -56 639 452488 5434436 2475
OSK-W-17-1095 147 -50 147 451959 5434734 2175
OSK-W-17-1105 328 -71 834 452920 5434843 3050
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-17-1140 336 -55 975 453006 5434522 2975
OSK-W-17-1141 236 -65 252 452143 5434747 2325
OSK-W-17-1142 324 -45 275 452202 5434628 2325
OSK-W-17-1147-W1 335 -52 1212 453241 5434381 3125
OSK-W-17-1152 330 -53 885 451738 5434293 1750
OSK-W-17-1155 332 -71 477 452451 5435008 2725
OSK-W-17-1158 331 -59 696 453046 5434871 3175
OSK-W-17-1168 329 -57 717 453464 5435090 3650
OSK-W-17-1179 332 -57 777 451560 5434376 1650
OSK-W-17-1186 331 -54 984 452419 5434554 2475
OSK-W-17-1188 318 -57 201 452067 5434618 2200
OSK-W-17-1196 310 -59 210 452066 5434618 2200
OSK-W-17-1209 331 -60 429 451456 5434453 1600
OSK-W-17-1212 330 -62 324 452303 5434914 2550
OSK-W-17-1218 327 -62 405 453004 5435009 3225
OSK-W-17-1220 141 -47 303 452025 5434811 2275
OSK-W-17-1221 335 -51 1079 453082 5434544 3050
OSK-W-17-1224 333 -70 402 452304 5434914 2550
OSK-W-17-1226 331 -51 934 453371 5434726 3400
OSK-W-17-1227 329 -50 1164 453290 5434532 3225
OSK-W-17-1228 328 -59 657 451443 5434484 1600
OSK-W-17-1232 154 -47 351 452025 5434834 2275
OSK-W-17-1243 146 -49 189 452060 5434781 2275
OSK-W-17-1246 324 -50 191 452082 5434636 2225
OSK-W-17-1252 324 -46 231 452132 5434944 2400
OSK-W-17-1253 337 -52 186 452081 5434634 2225

 

OSK-W-17-885-W2 intersected FW0 FW within the Underdog Corridor returning 10.8 g/t Au over 2.0 metres. The interval is composed of trace pyrite stringers and 10% centimetre scale quartz veins hosted in a chloritized felsic intrusive dike.

OSK-W-17-935 intersected 3.34 g/t Au over 2.8 metres related to Mallard HW, within the Mallard Corridor. Mineralization is composed of trace disseminated pyrite and stringers hosted in a silicified and sericitized rhyolite.

OSK-W-17-1013 infilled Zone 27 with 4.56 g/t Au over 2.8 metres. Mineralization is composed of up to 6% pyrite stringers and 16% semi-massive pyrite with tourmaline in pervasive silica flooding zone hosted is a sericitized rhyolite.

OSK-W-17-1025 intersected 4.17 g/t Au over 2.0 metres. The interval is composed of trace pyrite dissemination and clusters in a silicified gabbro. This intersection does not correlate to a known zone.

OSK-W-17-1026 intersected Zone 27 returning 4.93 g/t Au over 2.3 metres and 4.38 g/t Au over 3.2 metres. Mineralization is composed of trace clustered and disseminated pyrite in a silicified and sericitized felsic intrusive.

 OSK-W-17-1028 intersected 6.77 g/t Au over 2.0 metres. Mineralization consists of traces of disseminated pyrite and chalcopyrite in a chloritized andesite with 10% quartz-carbonate veins. This intersection does not correlate to a known zone.

OSK-W-17-1042 intersected 3.53 g/t Au over 2.3 metres in Zone 27. Mineralization is composed of 2% pyrite stringers, 1% disseminated pyrite, and a decimetre scale quartz vein within a sericitized, chloritized and slightly silicified felsic dyke.  

OSK-W-17-1050 infilled Zone 27 with 11.2 g/t Au over 2.0 metres. Mineralization consists of trace disseminated and stringer pyrite in a sericitized rhyolite.

OSK-W-17-1065 intersected 3.28 g/t Au over 2.3 metres related to Mallard 2. The interval occurs in a faulted zone with silica and sericite alteration and traces of pyrite-tourmaline stringer, trace disseminated pyrite and 13% tourmaline-quartz centimetre scale veins.

OSK-W-17-1066 intersected 4.21 g/t Au over 2.0 metres within the Caribou Corridor. Mineralization is composed of 3% disseminated pyrite and 1% quartz vein with pyrite hosted in a chloritized and slightly sericitized andesite.

OSK-W-17-1095 intersected 4.09 g/t Au over 3.0 metres related to Zone 27. Mineralization is composed of 2% – 3% tourmaline-pyrite veins hosted in a partially bleached, slightly sericitized and silicified andesite.

OSK-W-17-1105 intersected two intervals: 3.42 g/t Au over 2.0 metres and 4.49 g/t Au over 2.0 metres. The first interval is a new zone within an area between Caribou and the Lynx zones, geometry is to be determined. Mineralization is composed of 2% pyrite stringers in strongly chloritized and sericitized andesite. The second interval is related to Zone 27. Mineralization is composed of 1% pyrite stringers and 3% pyrite in association with crustiform veins, hosted in a felsic porphyry dike with sericite, silica and carbonate alteration.

OSK-W-17-1125 intersected 10.2 g/t Au over 5.4 metres related to FW2 in the Underdog Corridor. Mineralization is composed of 10% pyrite stringers hosted in a bleached andesite with one centimetre scale tourmaline-pyrite veinlets.

OSK-W-17-1125-W3 intersected 26.0 g/t Au over 2.2 metres related to Wolf HW in the Caribou Corridor. Mineralization is composed of 10% pyrite stringers hosted in a sericitized, chloritized and slightly silicified andesite.

OSK-W-17-1139 intersected 4.87 g/t Au over 3.4 metres related to CN1 FW in the Caribou Corridor. The interval consists of 2% pyrite stringers, 10% centimeter scale quartz veins in an andesite with strong chlorite and carbonate alteration and slight sericitization.

OSK-W-17-1140 intersected 3.56 g/t Au over 4.7 metres related to Zone 27. Mineralization is composed up 10% pyrite stringers in a sericitized felsic porphyric dike.

OSK-W-17-1141 infilled Zone 27 intersecting 30.0 g/t Au over 2.4 metres and 8.04 g/t Au over 2.3 metres. Mineralization includes up to 8% pyrite, 5% tourmaline-pyrite stringers and 3% pyrite clusters hosted in a sericitized rhyolite with intense pervasive silica flooding.

OSK-W-17-1142 intersected 3.07 g/t Au over 2.0 metres related to Zone 27 HW. Mineralization is composed of 14% pyrite stringers over 10 centimetres with pervasive silica flooding hosted in a rhyolite.

OSK-W-17-1147-W1 intersected 3.36 g/t Au over 2.4 metres and 3.94 g/t Au over 2.0 metres. The first interval is composed of 1% disseminated pyrite, trace pyrite clusters in a sericitized and lightly silicified rhyolite. This intersection is not related to any known zone. The second interval is composed of 3% pyrite stringers and semi massive sulfides over 60 cm hosted in a felsic dike with pervasive silica flooding, within the Caribou Corridor.

OSK-W-17-1152 intersected 5.67g/t Au over 2.0 metres related to FW1 in Underdog Corridor. Mineralization is composed of up 20% pyrite stringers, and 2% disseminated sphalerite in a sericitized and strongly silicified andesite.

OSK-W-17-1155 intersected 3.64 g/t au over 2.7 metres related to the Mallard Corridor. Mineralization is composed of traces of pyrite and chalcopyrite in a crustiform vein hosted in an andesite with chlorite, sericite and carbonates alteration.

OSK-W-17-1158 intersected 4.12 g/t Au over 2.4 metres related to Zone 27. The interval is composed of 10% pyrite stringers and traces of tourmaline-pyrite veins and a centime scale quartz-tourmaline vein hosted in a sericitized and bleached andesite.

OSK-W-17-1168 intersected 3.99 g/t Au over 2.6 metres in the Caribou Corridor. Mineralization is related to a crustiform vein with 1% pyrite stringers in a silicified gabbro with fuchsite.

OSK-W-17-1179 intersected 4.56 g/t Au over 2.7 metres related to the Underdog Corridor. Mineralization is composed of 5% pyrite with pervasive silica flooding in a sericitized felsic porphyric dike. It is a new zone located in western part of Underdog Corridor.

OSK-W-17-1186 intersected 5.38 g/t Au over 9.0 metres related to Caribou and 15.7 g/t Au over 3.0 metres related to FW3U in the Underdog Corridor. The first interval is composed of 10% pyrite stringers in an altered felsic porphyry dike with intense pervasive silica flooding. The second interval is composed of 5% pyrite in pervasive silica flooding, 4% pyrite cluster and stringer, and 2% pyrite in carbonates veining hosted in a felsic porphyric dike.

OSK-W-17-1188 intersected 3.09 g/t Au over 2.4 metres and 3.28 g/t Au over 2.0 metres in the Zone 27 Corridor. The first interval is composed of traces of pyrite-tourmaline stringers in a sericitized felsic porphyric dike. The second interval, Zone 27 infill, is composed of up to 5% tourmaline stringers and traces of disseminated pyrite in a pervasive silica flooding zone hosted in a sericitized rhyolite and felsic porphyric dike.

OSK-W-17-1196 infilled Zone 27 intersecting 3.26 g/t Au over 2.5 metres. The interval is at the sericitized contact between gabbro and rhyolite injected by low core angle crustiform veins. Mineralization is composed of 10% pyrite stringers, 4% disseminated pyrite or in clusters, and minor quartz veining.

OSK-W-17-1209 intersected 4.68 g/t Au over 2.8 metres related to FW4 in the Underdog Corridor. Mineralization is composed of massive pyrite (up 80%) over 70 cm in an altered zone with intense pervasive flooding hosted in a sericitized felsic porphyric dike.

OSK-W-17-1212 intersected Mallard returning 6.87 g/t au over 2.0 metres. Mineralization consists of 3% pyrite-tourmaline stringers, 1% pyrite stringers and 1% pyrite clusters in a strongly sericitized andesite.

OSK-W-17-1220 infilled Zone 27 intersecting 4.63 g/t Au over 4.3 metres. Mineralization is composed of 3% disseminated pyrite, 2% pyrite stringers, in a sericitized and bleached felsic porphyric dike.

OSK-W-17-1221 intersected 7.28 g/t Au over 2.0 metres and 3.45 g/t au over 3.9 metres related to Caribou 1. Mineralization is composed of up 10% pyrite stringers (fracture controlled) and clusters in a sericitized, chloritized and slightly silicified andesite.

OSK-W-17-1224 intersected 15.7 g/t Au over 2.8 metres related to Mallard 2. Mineralization is in a sericitized and silicified felsic porphyric dike at contact with andesite, including a ptygmatic tourmaline-quartz vein with 5% pyrite over 0.4 metre and semi-massive pyrite (40%) over 1.8 metres related to a pervasive silica flooding zone.

OSK-W-17-1226 intersected three intervals within Caribou Corridor; 3.43 g/t Au over 2.8 metres, 3.78 g/t Au over 2.0 metres and 3.42 g/t au over 2.3 metres. The first interval is a new zone at a sericitized and silicified contact between rhyolite and felsic intrusive composed of 35% pyrite-tourmaline stringers and 1% sphalerite-pyrite stringers. The second and third intervals correspond with up to 3% disseminated pyrite and pyrite stringers in a sericitized and chloritized andesite.

OSK-W-17-1227 intersected 4.37 g/t Au over 2.1 metres and 3.62 g/t Au over 2.0 metres. The first interval corresponds with 1% pyrite stringers and 4% pyrite-quartz-carbonate veins in a sheared and sericitized andesite. The second interval, can be related to the Main zone north-east extension (or south-west extension of Lynx), geometry remains to be determined. Mineralization is composed of 6% pyrite, traces of chalcopyrite and sphalerite in association with silica flooding and quartz-tourmaline veins hosted in a small quartz porphyry dike.

OSK-W-17-1228 intersected 7.59 g/t Au over 2.3 metres in the Underdog Corridor. Mineralization is composed of 2% pyrite in quartz-carbonates veins, trace pyrite stingers and metre scale quartz-carbonate veins hosted in a sericitized and strongly silicified rhyolite.

OSK-W-17-1232 infilled Zone 27 intersecting 5.50 g/t Au over 2.5 metres and 3.99 g/t Au over 3.0 metres. Mineralization is composed of up to 2% disseminated pyrite, 5% pyrite stringers and 2% tourmaline-pyrite veins in a strongly sericitized and bleached andesite. The second interval corresponds with 7% pyrite stringers in a sericitized felsic porphyric dike.

OSK-W-17-1243 infilled Zone 27 returning 5.23 g/t Au over 2.0 metres. Mineralization is composed of up to 7% pyrite stringers in a strongly sericitized to lightly silicified felsic porphyric dike.

OSK-W-17-1246 intersected Z27 HW with 5.62 g/t Au over 5.4 metres. Mineralization is composed of 3% irregular pyrite stringers, 2% disseminated pyrite in a strongly sericitized and chloritized felsic porphyry dike.

OSK-W-17-1252 intersected 3.55 g/t Au over 2.5 metres related to Mallard. Mineralization is composed of 25% pyrite stringers with locally clustered pyrite in a pervasive silica flooding zone hosted in a sericitized and silicified rhyolite.

OSK-W-17-1253 infilled Zone 27 with 4.88 g/t Au over 4.3 metres and 3.68 g/t au over 3.0 metres. Mineralization consists in up to 4% pyrite stringers and 5% pyrite clusters in a sericitized felsic dike.

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

Quality Control and Reporting Protocols
True widths determinations are estimated at 65-80% of the reported core length intervals for most of the zones. Assays are uncut except where indicated. Intercepts occur within geological confines of major zones but have not been correlated to individual vein domains at this time. Reported intervals include minimum weighted averages of 3.0 g/t Au diluted over core lengths of at least 2.0 metres. All NQ core assays reported were obtained by either 1-kilogram screen fire assay or standard 50-gram fire-assaying-AA finish or gravimetric finish at ALS Laboratories in Val 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 $220 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. This 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