Canadian Mining Journal


Nothing but high grades as Osisko continues drilling Windfall

The more it drills the Windfall gold project in the Abitibi Greenstone Belt of Quebec, the more high grade results Osisko Mining (TSX: OSK) reports from the work. The latest uncut high grade was 342 g/t gold over 2.5 metres, including 596 g/t over 0.8 metre, from hole OSK-W-1432-W2. Even after being cut to 100 grams, the grade was 71.1 g/t gold.

Current infill drilling is focused on resource blocks in the Lynx deposit. The company received results recently for 80 intercepts in 21 drill holes and 26 wedges. Select uncut intersects include 37.7 g/t gold over 7.2 metres; 56.4 g/t over 4 metres, 18.3 g/t over 5.5 metres and 45.3 g/t over 2.1 metres; 79.8 g/t over 2.4 metres; 63.8 g/t over 2.4 metres; 36 g/t over 2.7 metres; 42.2 g/t over 2 metres; and 21.1 g/t over 4 metres.

Earlier this month Osisko upgraded the Windfall resource estimate. Using a cut-off grade of 3.5 g/t gold, the Lynx deposit has measured and indicated resources of 6 million tonnes grading 9.6 g/t gold and 5.9 g/t silver for a contained total of almost 1.9 million oz. gold and 16.4 million oz. silver. The inferred portion totals 16.4 tonnes at 8 g/t gold and 2.7 g/t silver for 4.2 million oz. gold and 1.4 million oz. silver.

There are three other zones at the property. The Underdog and Main deposits have only indicated and inferred resource, and the Triple 8 has only an inferred tonnage.

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