|Quadrangle map, 1:250,000-scale||MC|
|Quadrangle map, 1:63,360-scale||B-5|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||This prospect is on the steep west valley wall of the Nizina River, north of Park Gulch. It is at an elevation of about 4,600 feet, 2,800 feet south of elevation 5720 and about 2,000 feet north-northwest of the center of section 12, T. 5 S., R. 15 E. of the Copper River Meridian. This is locality 74 of MacKevett (1976); the location is accurate to within a few hundred feet.|
Geologic descriptionThe deposit at this prospect consists of a small chalcocite-rich pod and chalcocite-bearing stringers in the lower part of the Triassic Chitistone Limestone (MacKevett, 1976). The prospect was explored by two short adits. Copper mineralization is widespread in the lower Chitistone Limestone. 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||(-142.64297103343, 61.4554663345233)|
|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? Copper mineralization is widespread in the lower Chitistone Limestone. 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||The prospect was explored by two short adits.|
|Indication of production||None|
Additional commentsThe locality is in the Wrangell-Saint Elias National Park and Preserve.
MacKevett, E.M., Jr., 1974, Geologic map of the McCarthy B-5 quadrangle, Alaska: U.S. Geological Survey Geologic Quadrangle Map GQ-1146, 1 sheet, scale 1:63,360.
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|