Osisko hits new discovery one km north of Windfall

“It’s early days, but it looks like we’ve found another new high-grade system near Windfall in an area with little drilling," said Osisko Mining Chief Executive Officer John Burzynski.

Osisko Mining Inc. says a significant new high-grade gold discovery has been made north of its 100% owned Windfall gold project located in the Abitibi greenstone belt, Urban Township, Eeyou Istchee James Bay, Québec.

"We are very excited by the Golden Bear discovery, particularly as this new mineralization is located less than a kilometre from the footprint of where we hope to build the Windfall mine and milling facility. When Osisko discovered the Lynx deposit in 2016 it was a game-changer for the overall scale and grade of Windfall. We believe that this new high-grade discovery may similarly have a significant positive effect on our development plans for the Windfall camp. It certainly underscores the highly prospective nature of Osisko’s strategic land package surrounding Windfall, the vast majority of which has yet to see any drilling.”

Reconnaissance drilling approximately one kilometre north of Windfall identified the discovery area (“Golden Bear”), located along a sub-parallel splay of the Windfall Bank Fault.

Golden Bear is situated within a package of andesitic to dacitic rock intruded by felsic porphyries. Mineralization in the discovery intersection consists of pyrrhotite ± pyrite-sphalerite-chalcopyrite with local visible gold in pervasive silica alteration and quartz-carbonate veins. Drilling on Golden Bear is now focused on confirming the discovery, its orientation and the extent of the mineralization. Additional drilling will include tight and wide step outs, and new results will be released as they are received.

Golden Bear Discovery
Mineralization is hosted in an altered andesite and occurs as pyrrhotite replacement in grey to translucent pervasive silica and quartz-carbonate-pyrrhotite veins. Replacement mineralization is associated with strong pervasive silica alteration and contains trace to 15% disseminated and clustered pyrrhotite with local visible gold and trace amounts of sphalerite-chalcopyrite. Vein-type mineralization is associated with a halo of pervasive sericite-chlorite ± ankerite alteration containing sulphides (predominantly pyrrhotite with trace sphalerite, chalcopyrite, pyrite, galena and arsenopyrite) and local visible gold.

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