Prospect, Inactive

Commodities and mineralogy

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

Geographic location

Quadrangle map, 1:250,000-scale HE
Quadrangle map, 1:63,360-scale B-2
Latitude 63.493
Longitude -147.637
Nearby scientific data Find additional scientific data near this location
Location and accuracy The Nenana prospect is at an elevation of about 4,800 feet, 1.75 miles west southwest of VABM 5756 (Fork). The map site is in the SW1/4 of sec. 30, T. 16 S., R. 1 E., of the Fairbanks Meridian. The location is accurate to within 1500 feet. This is location A-76 of Balen (1990: OFR 34-90).

Geologic setting

Geologic description

The area of the Nenana 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, and by Upper Cretaceous?-Lower Tertiary granites (Wilson and others, 1998). The prospect consists of pyrite?, chalcopyrite, and sphalerite disseminated in the sedimentary rocks.
Geologic map unit (-147.639275698031, 63.4925517529035)
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Workings or exploration Exploration consisted of rock-chip and soil sampling (unpublished report for the New Alaska Syndicate, 1977).
Indication of production None