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Snowbird

Prospect, Inactive

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Commodities and mineralogy

Main commodities Cu

Geographic location

Quadrangle map, 1:250,000-scale MC
Quadrangle map, 1:63,360-scale B-5
Latitude 61.3833
Longitude -142.5233
Nearby scientific data Find additional scientific data near this location
Location and accuracy This prospect is near Boulder Creek, a north tributary to Dan Creek. It is on Boulder Creek at an elevation of about 2,700 feet, 3,400 feet southwest of elevation 4480. It is in the NW1/4 of section 3, T. 6 S., R. 16 E. of the Copper river Meridian. This is National Park Service locality WRST-211 and the latitude and longitude for this record were provided by the National Park Service. Although this National Park Service map location is somewhat distant, this is probably the Snow Bird prospect described as MC139.

Geologic setting

Geologic description

An unpublished National Park Service map and accompanying database identify this locality as a copper vein prospect. Bedrock in the area is Triassic Nikolai Greenstone (MacKevett, 1974). 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 (-142.525355580203, 61.3828699253385)
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

Indication of production None

Additional comments

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

References

References

MacKevett, E.M., Jr., 1974, Geologic map of the McCarthy B-5 quadrangle, Alaska: U.S. Geological Survey Geologic Quadrangle Map GQ-1146, 1 sheet, scale 1:63,360.
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