Unnamed (at Peak 5532)

Prospect, Probably inactive

Commodities and mineralogy

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

Geographic location

Quadrangle map, 1:250,000-scale HE
Quadrangle map, 1:63,360-scale A-2
Latitude 63.009
Longitude -147.733
Nearby scientific data Find additional scientific data near this location
Location and accuracy This prospect is on Peak 5532, at the west-central edge of sec. 15, T. 22 S., R. 1 W., of the Fairbanks Meridian. The location is accurate to within 1,000 feet. This is location B-13 of Balen (1990: 34-90).

Geologic setting

Geologic description

The country rocks at this prospect are Middle or Upper Triassic Nikolai Greenstone, and probably cogenetic, ultramafic dikes that cut the greenstone. The deposit consists of disseminations and pods of chalcopyrite, chromite, pentlandite, and pyrrhotite in within the ultramafic intrusive rocks. Samples contain as much as 0.41% chromium, 0.15% copper, 0.11% nickel, 28 ppb palladium, and 140 ppb platinum (Balen and others, 1991).
Geologic map unit (-147.735253939287, 63.0085467150891)
Mineral deposit model Cu-Ni-PGE (Cox and Singer, 1986; model 5).
Mineral deposit model number 5
Age of mineralization The ore minerals probably are magmatic segregations in the Triassic ultramafic hostrocks.

Production and reserves

Workings or exploration There has only been surface sampling to date.
Indication of production None

Additional comments

This deposit was discovered in the 1980s, during a regional geologic reconnaissance by the Bureau of Land Management (Balen, 1990: OFR 34-90).

References