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Osisko Mining Inc.

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Summary

Project:

Windfall

Deposit:Lynx
Location:Canada
Commodities:Gold
Date:10/23/2018
Report Code:NI43-101
Report Type:Exploration/Drilling Update
Project Stage:Pursuing Resource Increase/Upgrade
Report details:23-10-2018: Osisko Mining Inc. announces an Exploration/Drilling Update report for its Lynx deposit at the Windfall project. Drilling results incl. 2.7m @ 1026g/t Au from 283.3m. (Toronto, October 23, 2018) Osisko Mining Inc. (OSK:TSX. "Osisko" or the "Co
Resources:(Resource): 2.382Mt @ 7.85g/t Au (Inf.), 10.605Mt @ 6.70g/t Au (Ind.)
CP/QP:[Overall Report]: Louis Grenier (Internal)
ABSTRACT:(Toronto, October 23, 2018) Osisko Mining Inc. (OSK:TSX. "Osisko" or the "Corporation") is pleased to provide new infill drilling results from the ongoing drill definition and expansion 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 commenced in late 2015. The program is currently focussed on infill drilling within the main Windfall gold deposit and the adjacent Lynx deposit (located immediately NE of Windfall), exploration and expansion drilling on the main mineralized zones, and deep exploration in the central areas of the intrusive system. Significant new analytical results from 37 intercepts in 17 drill holes and 6 wedges focused on infill drilling are presented below. Highlights from the new results include: 1026 g/t Au over 2.7 metres in OSK-W-18-1725; 48.7 g/t Au over 3.3 metres in OSK-W-18-1560-W2; 59.3 g/t Au over 2.0 metres in OSK-W-18-1503-W1; 39.3 g/t Au over 2.3 metres in OSK-W-18-1665; 33.3 g/t Au over 2.7 metres in OSK-W-18-1711-W2 and 9.01 g/t Au over 9.2 metres in OSK-W-18-1402-W3. Maps showing hole locations and full analytical results are available at www.osiskomining.com. OSK-W-18-1402-W3 intersected 9.01 g/t Au over 9.2 metres in Underdog. Mineralization includes up to 15% pyrite stringers, 3% chalcopyrite, 2% quartz-tourmaline ptygmatic veins and local visible gold within a strong silica and sericite altered felsic porphyritic dike. OSK-W-18-1475 intersected 8.09 g/t Au over 2.2 metres in Lynx. Mineralization includes 4% disseminated pyrite and stringers in a moderate chlorite, weak silica and sericite altered rhyolite. OSK-W-18-1503-W1 intersected three intervals in Lynx: 5.09 g/t Au over 2.3 metres, 59.3 g/t Au over 2.0 metres and 29.7 g/t Au over 2.0 metres. The first interval contains 5% disseminated/cluster pyrite, and up 3% pyrite/pyrite-tourmaline stringers within a weak fuchsite and sericite altered gabbro. The second interval contains local visible gold in pyrite stringers and trace chalcopyrite within a moderate sericite altered rhyolite. The third interval has local visible gold and electrum within centimetre scale smoky quartz veins, hosted in a moderate sericite altered rhyolite.

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