Alaska Jupiter

Prospect, Active?

Commodities and mineralogy

Main commodities Au
Ore minerals arsenopyrite
Gangue minerals quartz

Geographic location

Quadrangle map, 1:250,000-scale HE
Quadrangle map, 1:63,360-scale A-6
Latitude 63.16
Longitude -149.67
Nearby scientific data Find additional scientific data near this location
Location and accuracy The Alaska Jupiter prospect is at an elevation of about 3,800 feet, on the north side of a divide between upper Copeland and Long creeks. The map site is in the SW1/4 of sec. 21, T. 20 S., R. 11 W., of the Fairbanks Meridian. The accuracy is of the location is within 1.5 miles. This is location E-26 of Balen (1990: OFR 34-90).

Geologic setting

Geologic description

The country rocks at the Alaska Jupiter prospect include Upper Jurassic to Upper Triassic crystal tuff, argillite, graywacke and chert, and Upper Cretaceous (?) porphyry dikes. The rocks are cut by the Chulitna fault. The deposit is along the fault, and consists of quartz-arsenopyrite veins that cut both the bedded and intrusive rocks. Samples contain gold near the 5 ppb detection limits of the analysis (Balen, 1990: OFR 34-90).
Geologic map unit (-149.672288788203, 63.1595242019825)
Mineral deposit model Low-sulfide Au-quartz vein? (Cox and Singer, 1986; model 36a?).
Mineral deposit model number 36a?
Age of mineralization Probably Late Cretaceous or younger.

Production and reserves

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

References