|Quadrangle map, 1:250,000-scale||MC|
|Quadrangle map, 1:63,360-scale||C-1|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||This occurrence is on the west valley wall of an unnamed glacier about 3 miles west of Guerin Glacier, at the head of Cub Creek. The site is at an elevation of about 6,000 feet, 4,500 feet east of elevation 7745 in the SW1/4 of section 35, T. 3 S., R. 23 E. of the Copper River Meridian. This is locality 111 of MacKevett (1976); the location is accurate to within about 1,000 feet.|
Geologic descriptionThis occurrence consists of a 10- by 100-foot area in Triassic sedimentary rocks that has veinlets of copper-bearing minerals, mostly malachite (MacKevett, 1976). A sample of the mineralization contained 100 parts per million (ppm) silver, 1,500 ppm arsenic, and more than 20,000 ppm copper. Copper mineralization is widespread in Triassic volcanic and sedimentary rocks of the McCarthy quadrangle. It 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||(-141.119134584443, 61.5610507111426)|
|Mineral deposit model||Basaltic Cu (Cox and Singer, 1986; model 23)|
|Mineral deposit model number||23|
|Age of mineralization||Cretaceous? Copper mineralization is widespread in Triassic volcanic and sedimentary rocks of the McCarthy quadrangle. It 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||Limited surface sampling.|
|Indication of production||None|
Additional commentsThe locality is in the Wrangell-Saint Elias National Park and Preserve.
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., 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, Inc.)|
|Last report date||1/12/2003|