|Quadrangle map, 1:250,000-scale||MC|
|Quadrangle map, 1:63,360-scale||B-4|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||This mine is on the south valley wall of the Chitistone River east of the lower part of Lime Spring Creek. It is at an elevation of about 3,200 feet, 3,500 feet northwest of elevation 5615, about 1,000 feet south of the center of section 11, T. 5 S., R. 16 E. of the Copper River Meridian. This is locality 73 of MacKevett (1976); the location is accurate to within a few hundred feet. Cobb and MacKevett (1980) included this mine under the name 'Peavine'.|
Geologic descriptionThe deposit at this mine consists of malachite and azurite with some chalcocite that occurs in a brecciated fault zone that cuts both Triassic Chitistone Limestone and underlying Triassic Nikolai Greenstone (Miller, 1946; MacKevett and Smith, 1972; MacKevett, 1976). A small amount of mineralized material was shipped in the winter of 1973-74 (MacKevett, 1976). The mine was developed by a short adit and surface workings. 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||(-142.488764908583, 61.4479732445619)|
|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).|
|Alteration of deposit||Oxidation.|
|Workings or exploration||The mine was developed by a short adit and surface workings.|
|Indication of production||Yes; small|
|Production notes||A small amount of mineralized material was shipped in the winter of 1973-74 (MacKevett, 1976).|
Additional commentsThe locality is in the Wrangell-Saint Elias National Park and Preserve.
Cobb, E.H., and MacKevett, E.M., Jr., 1980, Summaries of data on and lists of references to metallic and selected nonmetallic mineral deposits in the McCarthy quadrangle, Alaska: U.S. Geological Survey Open-File Report 80-885, 156 p.
MacKevett, E.M., Jr., 1976, Mineral deposits and occurrences in the McCarthy quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-773-B, 2 sheets, scale 1:250,000.
MacKevett, E.M., Jr., and Smith, J.G., 1972, Geologic map of the McCarthy B-4 quadrangle, Alaska: U.S. Geological Survey Geologic Quadrangle Map GQ-943, 1 sheet, scale 1:63,360.
|Reporters||Travis L. Hudson (Applied Geology, Inc.)|
|Last report date||1/12/2003|