Unnamed (south wall of lower Yanert Glacier)

Occurrence, Inactive

Commodities and mineralogy

Main commodities Cu
Ore minerals chalcopyrite; pyrite; pyrrhotite

Geographic location

Quadrangle map, 1:250,000-scale HE
Quadrangle map, 1:63,360-scale C-2
Latitude 63.59
Longitude -147.71
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is at an elevation of about 5,000 feet, on the south wall of lower Yanert Galcier. The map site is about 4.8 miles northeast of Nenana Mountain, in the NE1/4 of sec. 27, T. 15 S., R. 1 W., of the Fairbanks Meridian. The location is accurate to within half a mile. This is locality 21 of Cox and others (1989).

Geologic setting

Geologic description

The country rocks at this occurrence are Upper Triassic calcareous metasedimentary rocks and Jurassic to Cretaceous graywacke, intruded by Tertiary granite. The deposit consists of chalcopyrite-pyrite-pyrrhotite-bearing skarn at the granite contact (Cox and others, 1989).
Geologic map unit (-147.71228703367, 63.5895555319829)
Mineral deposit model Cu skarn (Cox and Singer, 1986; model 18b)
Mineral deposit model number 18b
Age of mineralization Probably Tertiary.
Alteration of deposit Formation of skarn at granite contact.

Production and reserves

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