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Osisko Announces Initial Drill Results from Black Dog Gold Project in Quebec

Osisko Mining Inc. (TSX:OSK) ("Osisko" or the "Corporation") is pleased to announce initial drill results from its 100% owned Black Dog gold project located in Barry Township, Québec. The project is situated 15 kilometres SW of its flagship Windfall Lake Gold Deposit. Drilling is targeting geophysical conductors identified with an airborne electromagnetic (EM) survey completed earlier in the year by Osisko that coincide with a 600 x 800 metre circular magnetic anomaly. The geophysical anomalies sit atop a zone of pervasive and/or brecciated quartz-tourmaline-sulfide alteration that has been the object of historical shallow drilling.

DDH OSK-BD-16-002 was collared 150 metres to the east of an outcropping alteration zone (dubbed "Tourmaline Hill"). This new hole intersected 6.14 g/t Au and 34.1 g/t Ag over 14.4 metres, including 15.6 g/t Au and 93.5 g/t Ag over 2.8 metres in a mineralized tourmaline breccia containing 2-15% coarse pyrite and 10% chalcopyrite. This intersection is part of a wider intercept that averaged 3.42 g/t Au and 23.2 g/t Ag over the entire intersected length of 32.1 metres. Significant results from the two drill holes are presented in the table below. DDH OSK-BD-16-001 was collared 600 metres to the SW of OSK-BD-16-002 and intersected 5.76 g/t Au and 34.8 g/t Ag over 0.9 metres in a tourmaline breccia.

Further drilling is currently in progress and is directed at determining the extent and continuity of the new mineralization discovered at Black Dog.

Maps and sections showing the location of DDH OSK-BD-16-001 and -002 are available at

Drill Hole From (m) To (m) Interval (m) Au (g/t) Ag (g/t) Cu (%) Zone
OSK-BD-16-001 199.9 200.8 0.9 5.76 34.8 0.71 Black Dog
OSK-BD-16-002 93.2 125.3 32.1 3.42 23.2 0.65 Black Dog
including 97.2 111.6 14.4 6.14 34.1 0.95 Black Dog
including 97.2 100.0 2.8 15.6 93.5 3.29 Black Dog

(1) For complete drilling results please see
(2) True Widths are not known. See "Quality Control" below.

Full analytical results from the new drill holes are available at

Hole Number Azimuth
OSK-BD-16-001 330 -56 288 441704 5422936
OSK-BD-16-002 332 -61 196.5 442131 5423313

Qualified Person

The scientific and technical content of this news release has been reviewed, prepared and approved by Mr. Jean-Philippe Desrochers, Ph.D., P.Geo. Senior Project Manager of the Windfall Lake gold project and the Black Dog 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

Additional drilling is planned for the immediate area which will enable the true width determination. Assays are uncut except where indicated. All NQ core assays reported were obtained by either 1 kilogram whole rock metallic screen/fire assay or standard 50 gram fire-assaying with AA or gravimetric finish at ALS Laboratories in Val d'Or, Québec or Sudbury, Ontario. The 1 kilogram metallic screen assay method is selected by the geologist when samples contain coarse gold or present a higher percentage of pyrite than surrounding intervals. All 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 and interpretation of results is performed by qualified persons employing a Quality Assurance/Quality Control program consistent with NI 43-101 and industry best practices. Standards and blanks are included with every 20 samples for Quality Assurance/Quality Control purposes by the Corporation as well as the lab. Approximately 5% of sample pulps are sent to secondary laboratories for check assays.


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