Unnamed (west wall of West Fork Glacier)

Prospect, Inactive

Commodities and mineralogy

Main commodities Ag; Cu; Zn
Ore minerals chalcopyrite; pyrrhotite; sphalerite

Geographic location

Quadrangle map, 1:250,000-scale HE
Quadrangle map, 1:63,360-scale B-2
Latitude 63.474
Longitude -147.589
Nearby scientific data Find additional scientific data near this location
Location and accuracy This prospect is at an elevation of about 4,200 feet in a creek draining the west wall of West Fork Glacier. The map site is in the NW1/3 of sec. 5, T. 17 S., R. 1 E., of the Fairbanks Meridian. The location is accurate to within 2,000 feet. This is location 26 of Cox and others (1989), location A-74 of Balen (1990: OFR 34-90).

Geologic setting

Geologic description

The are of this prospect is underlain by Upper Triassic, 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 (Wilson and others, 1998), and by Upper Cretaceous?-Lower Tertiary granites. The strata are complexly folded. The prospect is described as a polymetallic replacement deposit containing chalcopyrite, pyrrhotite, and sphalerite (Cox and others, 1989).
Geologic map unit (-147.591274012811, 63.4735522885516)
Mineral deposit model Polymetallic replacement (Cox and Singer, 1986; model 19a)
Mineral deposit model number 19a

Production and reserves

Workings or exploration Surface exploration only, to date. Soil sampling, stream-sediment sampling, ground EM and magnetic geophysical surveys were conducted in the mid-1970s (unpublished report for the New Alaska Syndicate, 1977).
Indication of production None

References