Unnamed (west of terminus of Russell Glacier)

Prospect, Inactive

Commodities and mineralogy

Main commodities Cu
Ore minerals bornite; chalcocite

Geographic location

Quadrangle map, 1:250,000-scale MC
Quadrangle map, 1:63,360-scale C-3
Latitude 61.6966
Longitude -141.8695
Nearby scientific data Find additional scientific data near this location
Location and accuracy This prospect is on the ridge west of the terminus of Russell Glacier. It is close to elevation 6807, in the NW1/4 of section 18, T. 2 S., R. 20 E. of the Copper River Meridian. This is locality 153 of MacKevett (1976); the location is is accurate to within 1,000 feet.

Geologic setting

Geologic description

The deposit at this prospect consists of thin veins of bornite and chalcocite that cut Triassic Nikolai Greenstone (Moffit and Knopf, 1910, p. 57; MacKevett, 1976). The deposits were explored by small pits and trenches. Copper mineralization is common in Nikolai Greenstone and is thought to have accompanied regional deformation and low-grade metamorphism in the Late Jurassic to Early Cretaceous (MacKevett and others, 1997).
Geologic map unit (-141.871598363019, 61.696219123267)
Mineral deposit model Basaltic Cu (Cox and Singer, 1986; model 23)
Mineral deposit model number 23
Age of mineralization Cretaceous? Copper mineralization is common in Nikolai Greenstone and is thought to have accompanied regional deformation and low-grade metamorphism in the Late Jurassic to Early Cretaceous (MacKevett and others, 1997).

Production and reserves

Workings or exploration The prospect was explored with small pits and trenches.
Indication of production None

Additional comments

The locality is in the Wrangell-Saint Elias National Park and Preserve.

References

MRDS Number A011745

References

MacKevett, E.M., Jr., Cox, D.P., Potter, R.W., III, and Silberman, M.L., 1997, Kennecott-type deposits in the Wrangell Mountains, Alaska--High-grade copper ores near a basalt-limestone contact, in Goldfarb, R.J., and Miller, L.D., eds., Mineral deposits of Alaska: Economic Geology Monograph 9, p. 66-89.
Reporters Travis L. Hudson (Applied Geology, Inc.)
Last report date 1/12/2003