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Copperwood In September and October 2008, Orvana’s wholly-owned subsidiary, Orvana Resources US Corp., entered into mineral leases covering 712 hectares (1,759 acres), now referred to as Copperwood. This area is located in the Upper Peninsula (UP) of the State of Michigan some 30 kilometres southwest of the inactive White Pine Mine where over 1.7 million tonnes of copper and over 4.5 million ounces of silver were produced between 1953 and 1996. The stratiform copper mineralization at Copperwood is hosted in shales and siltstones of the basal Nonesuch Formation and is stratigraphically equivalent to the copper-bearing zone at the White Pine Mine. The mineralization occurs as very fine-grained chalcocite (<20 microns). The Company completed an 82-hole, 13,000-metre delineation drill program to provide information sufficient to estimate a resource to measured and indicated confidence categories that meets the standards of National Instrument 43-101. Orvana’s acquisition of core from 11 of the 20 1950s holes drilled in T49N, R46W, Section 1 assists understanding of the 1950s drill logs, of which Orvana possesses copies, and correlation of the key lithologic units. The lithologic scheme developed by the Orvana project geologists is a variation of that used at the inactive White Pine. Based on current assumptions, the Company targets production start up around 2013. |
Location Map![]() Click to enlarge Drillhole Locations ![]() Click to enlarge |
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