Unnamed (southwest of Pyramid Peak)

Occurrence, Inactive

Commodities and mineralogy

Main commodities Cu; Zn
Ore minerals chalcopyrite; pyrite; sphalerite

Geographic location

Quadrangle map, 1:250,000-scale HE
Quadrangle map, 1:63,360-scale B-3
Latitude 63.421
Longitude -148.394
Nearby scientific data Find additional scientific data near this location
Location and accuracy The prospect is at an elevation of about 4,100 feet, about two miles southwest of the summit of Pyramid Peak. The map site is in the SW1/4 of sec. 19, T. 17 S., R. 4 W., of the Fairbanks Meridian. The location is accurate to within 1,500 feet.

Geologic setting

Geologic description

The country rocks in the area of this prospect are Upper Triassic, generally thin-bedded, commonly cross-bedded, carbonaceous shale, argillite, sandstone, and siltstone. The strata are cut by numerous dikes, sills, and plugs of altered diabase and gabbro, and by Upper Cretaceous?-Lower Tertiary granites (Wilson and others, 1998). The prospect consists of pyrite, chalcopyrite, and sphalerite disseminated in the bedded rocks.
Geologic map unit (-148.396277253569, 63.4205442022611)
Mineral deposit model Besshi massive sulfide (Cox and Singer, 1986; model 24b)
Mineral deposit model number 24b
Age of mineralization The sulfide minerals probably are syngenetic with their Upper Triassic host rocks.

Production and reserves

Workings or exploration Surface exploration only.
Indication of production None