Canadian Mining Journal

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COPPER: Latest 43-101 for Granduc increases tonnage and grade

BRITISH COLUMBIA – Castle Resources of Vancouver has released the updated resource estimate for its Granduc copper project near Stewart. According to the company, both tonnage and copper grade are better than earlier estimates.



BRITISH COLUMBIA – Castle Resources of Vancouver has released the updated resource estimate for its Granduc copper project near Stewart. According to the company, both tonnage and copper grade are better than earlier estimates.

The Granduc copper deposit consists for a Main and a North zone. Measured and indicated resources now stand at 11.32 million tonnes grading 1.47% Cu, 0.17 g/t Au and 12.4 g/t Ag or 367.7 million lb of copper, 61,400 oz of gold, and 4.52 million oz of silver. There is also an inferred resource of 44.63 million tonnes grading 1.43% Cu, 0.19 g/t Au and 10.7 g/t Ag. A CuEq cut-off of 0.8% was used.

The former Granduc mine produced 420 million lb of copper in concentrate from 1971 to 1984. A timeline for the proposed reopening is available at CastleResources.com.