Occurrences, Probably inactive

Commodities and mineralogy

Main commodities Cr; Cu; Ni; Pd; Pt
Ore minerals chalcopyrite; chromite; pyrite; pyrrhotite

Geographic location

Quadrangle map, 1:250,000-scale PA
Quadrangle map, 1:63,360-scale D-3
Latitude 56.92599
Longitude -134.94496
Nearby scientific data Find additional scientific data near this location
Location and accuracy These occurrences are in small bodies of pyroxenite and dunite exposed in the mountains south of the headwaters of the Vodopad River. The occurrences are about 1.6 miles west-northwest of peak 2469 and near the center of section 13, T. 57 S., R. 66 E.

Geologic setting

Geologic description

Dunite and pyroxenite occur in a series of sub-parallel, northwest-trending lenses less than a mile long in a heterogeneous Triassic unit of phyllite with some quartzite, greenstone, graywacke, semischist, and metachert (Loney and others, 1975). The dunite contains thin trains and disseminations of chromite; the pyroxenite contains sparsely disseminated chalcopyrite, pyrite, and pyrrhotite. The deposit was found in 1935; claims were soon staked but were abandoned by 1942 (Guild and Balsley, 1942). Bittenbender and others (1999) collected samples of the pyroxenite for analysis. They contained 12 to 3,050 parts per million (ppm) copper and 7 to 1,100 ppm nickel. One sample, the one with the highest copper value, contained 55 parts per billion (ppb) platinum and 68 ppb palladium; all the other samples contained 5 ppb or less platinum and 10 ppb or less palladium. All the studies of the deposit indicate that the economic potential of the prospect is low (Guild and Balsley, 1942; Kennedy and Walton, 1946; Bittenbender and others, 1999).
Geologic map unit (-134.946718032116, 56.9256229970367)
Mineral deposit model Dunite and pyroxenite with low values of Cu, Cr, Ni, Pd, and Pt.
Age of mineralization Loney and others (1975) indicate that the ultramafic bodies that contain the economic elements of interest are Mesozoic in age.

Production and reserves

Workings or exploration Claims were staked in 1935 or shortly thereafter but were abandoned by 1942. There is no indication of significant workings.
Indication of production None
Reserve estimates None.

Additional comments

MAS number: 0021160002.