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New occurrences of lead, zinc, and silver of potential economic significance were identified during a heavy metals investigation of the southern Alaska Range in 1967. The deposits, approximately 23 miles south of Farewell, are replacement bodies and fissure veins in limestone and fracture fillings in igneous breccia. Deposits in limestone show a close spatial relation to igneous breccia and granodiorite porphyry aswellastofelsitedikes. Ore minerals are argentiferous galena and sphalerite. Deposits in breccia consist of pyrrhotite and sphalerite and may represent only part of a more extensively mineralized breccia mass. Although most of the deposits that crop out are sporadic and discontinuous, the number of occurrences with locally high silver content, their possible continuity beneath surficial deposits, and a favorable geologic environment suggest that the area has an economic potential for base and precious metals.

Lead, zinc, and silver deposits at Bowser Creek, McGrath A-2 quadrangle, Alaska