Main commodities | Cu |
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Quadrangle map, 1:250,000-scale | MC |
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Quadrangle map, 1:63,360-scale | C-6 |
Latitude | 61.5554 |
Longitude | -143.0922 |
Nearby scientific data | Find additional scientific data near this location |
Location and accuracy | This prospect is on the valley wall south of Hidden Creek Lake. It is at an elevation of about 4,000 feet, 1,200 feet south of Hidden Creek Lake and 2,000 feet north of the center of section 5, T. 4 S., R. 13 E. of the Copper River Meridian. This is National Park Service locality WRST-164 and the latitude and longitude for this record were provided by the National Park Service. |
Geologic descriptionAn unpublished National Park Service map and accompanying database identify this locality as a copper prospect where 12 claims were once staked. The prospect is near the contact between Triassic Nikolai Greenstone and overlying Triassic Chitistone Limestone (MacKevett, 1972). 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 | (-143.094283097728, 61.5549607928457) |
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Mineral deposit model | Basaltic Cu? (Cox and Singer, 1986; model 23) and/or Kennecott-type copper deposit (after MacKevett and others, 1997) |
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). |
Indication of production | Undetermined |
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Additional commentsThe locality is in the Wrangell-Saint Elias National Park and Preserve. |
ReferencesMacKevett, 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.
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Reporters | Travis L. Hudson (Applied Geology, Inc.) |
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Last report date | 1/12/2003 |