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The Kidd Creek massive sulfide deposit is one of the world’s largest and highest grade Cu-Zn deposits, with total past production, reserves, and resources to the 9,800-ft level (2,990 m) of 170.9 million tonnes (Mt). The discovery hole, K55-1, was drilled in 1963 and encountered ore at a depth of only 7 m. It intersected 190 m grading 1.21% Cu, 8.5% Zn, 0.8% Pb, and 138 g/t Ag. The deepest ore intersection at 10,200 ft (more than 3,100 m) cut 442 m of mineralization with an average grade of 1.16% Cu, 7.8% Zn, 0.73% Pb, and 84 g/t Ag,...

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