|Quadrangle map, 1:250,000-scale||NB|
|Quadrangle map, 1:63,360-scale||B-4|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||This occurrence is near the crest of the mountains between Cooper Creek and the Nabesna River. It is at an elevation of about 6,000 feet, 3,000 feet southwest of peak 7390 and 4,500 feet northwest of peak 7895. The occurrence is about 0.2 mile southeast of the center of section 36, T. 7 N., R. 14 E. of the Copper River Meridian. This is locality 15 of Richter and others (1975) and National Park Service locality WRST-18 (unpublished data). Cobb and Richter (1980) included this occurrence under the name 'Camp Cr.'. It is located to within a few hundred feet.|
Geologic descriptionA chalcocite vein, 6 inches to 2 feet wide, cuts amygdaloidal basalt of the Triassic, Nikolai Greenstone here; a sample assayed 61 percent copper (Mendenhall and Schrader, 1903). Nikolai Greenstone makes up most of the bedrock in the headwaters of Camp Creek (Richter, 1971 [I-656], 1976). Copper mineralization is locally 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||(-142.730732288309, 62.3429233737665)|
|Mineral deposit model||Basaltic copper (Cox and Singer, 1986; model 23)|
|Mineral deposit model number||23|
|Age of mineralization||Cretaceous? Alteration and copper mineralization in the Nikolai Greenstone is thought to have accompanied regional deformation and low-grade metamorphism in the Late Jurassic to Early Cretaceous (MacKevett and others, 1997).|
|Workings or exploration||Some surface prospecting has occurred at this locality.|
|Indication of production||None|
Additional commentsThe occurrence is in the Wrangell-St. Elias National Preserve.
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.
Mendenhall, W.C., and Schrader, F.C., 1903, The mineral resources of the Mount Wrangell District, Alaska: U.S. Geological Survey Professional Paper 15, 71 p., 1 sheet.
Richter, D.H., 1976, Geologic map of the Nabesna quadrangle, Alaska: U.S. Geological Survey Miscellaneous Investigations Series Map I-932, 1 sheet, scale 1:250,000.
|Reporters||Travis L. Hudson (Applied Geology)|
|Last report date||11/24/2002|