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Kimberly

Prospect, Inactive

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Commodities and mineralogy

Main commodities Ag; Cu

Geographic location

Quadrangle map, 1:250,000-scale MC
Quadrangle map, 1:63,360-scale C-8
Latitude 61.7226
Longitude -143.9454
Nearby scientific data Find additional scientific data near this location
Location and accuracy An unpublished National Park Service map places this prospect on the low ridge north of the junction of the lower Kluvesna River and the Kotsina River. The prospect is approximately located at an elevation of about 3,200 feet, 1,400 feet west of the center of section 3, T. 2 S., R. 8 E. of the Copper River Meridian. This is National Park Service locality WRST-120 and the latitude and longitude for this record were provided by the National Park Service.

Geologic setting

Geologic description

An unpublished National Park Service map and accompanying database identify this locality as a silver and copper prospect. Bedrock in the area is Triassic Nikolai Greenstone (MacKevett and others, 1978). The widespread deposition of copper in Triassic greenstone and limestone of the area is thought to have accompanied regional deformation and low-grade metamorphism in the Late Jurassic or Early Cretaceous (MacKevett and others, 1997). Copper-bearing minerals were deposited in the underlying Nikolai Greenstone at about 112 Ma (Silberman and others, 1980).
Geologic map unit (-143.947495075811, 61.722137699594)
Mineral deposit model Basaltic Cu? (Cox and Singer, 1986; model 23)
Mineral deposit model number 23?
Age of mineralization Cretaceous? The widespread deposition of copper in Triassic greenstone and limestone of the area is thought to have accompanied regional deformation and low-grade metamorphism in the Late Jurassic or Early Cretaceous (MacKevett and others, 1997). Copper-bearing minerals were deposited in the underlying Nikolai Greenstone at about 112 Ma (Silberman and others, 1980).
Alteration of deposit Oxidation?

Production and reserves

Workings or exploration Perhaps some surface exploration.
Indication of production Undetermined

Additional comments

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

References

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.
MacKevett, E.M., Jr., Smith, J.G., Jones, D.L., and Winkler, G.R., 1978, Geologic map of the McCarthy C-8 quadrangle, Alaska: U.S. Geological Survey Geologic Quadrangle Map GQ-1418, 1 sheet, scale 1:63,360.
Silberman, M.L., MacKevett, E.M., Jr., Connor, C.L., and Mathews, A., 1980, Metallogenic and tectonic significance of oxygen isotope data and whole-rock potassium-argon ages of Nikolai Greenstone, McCarthy quadrangle, Alaska: U.S. Geological Survey Open-File Report 80-2019, 31 p.
Reporters Travis L. Hudson (Applied Geology, Inc.)
Last report date 1/12/2003