|Quadrangle map, 1:250,000-scale||NB|
|Quadrangle map, 1:63,360-scale||D-6|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||This occurrence is on the crest of the range north of Bear Valley. It is in a saddle at an elevation of 5,450 feet, about 6,500 feet southeast of elevation 5870. The site is just inside the west boundary of NE1/4 of section 33, T. 13 N., R. 10 E. of the Copper River Meridian. This is locality 4 of Richter and others (1975). Cobb and Richter (1980) included this deposit as an 'Unnamed occurrence'. It is located to within a few hundred feet.|
Geologic descriptionAmygdaloidal basalt of the Triassic, Nikolai Greenstone is heavily stained with azurite and malachite at this location. 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||(-143.523192159316, 62.8667278537196)|
|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).|
|Indication of production||None|
Cobb, E.H., and Richter, D.H., 1980, Summaries of data on and list of references to metallic and selected nonmetallic mineral deposits in the Nabesna quadrangle, Alaska: U.S. Geological Survey Open-File Report 80-927, 117 p.
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)|
|Last report date||11/24/2002|