|Quadrangle map, 1:250,000-scale||MC|
|Quadrangle map, 1:63,360-scale||C-8|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||This prospect is southeast of the terminus of Kuskulana Glacier. It is at an elevation of about 4,200 feet, 2,800 feet northwest of elevation 5805, and 1,200 feet southwest of the center of section 18, T. 3 S., R. 10 E. of the Copper River Meridian. This is locality 126 of MacKevett (1976) and locality 26 of MacKevett and others (1978). The location is accurate to within about 100 feet.|
Geologic descriptionThe deposit at this prospect consists of a 2- to 3-foot-thick, malachite-stained shear zone that contains pyrite, chalcopyrite, and free gold (Moffit and Mertie, 1923; MacKevett, 1976). The shear zone is between Triassic Nikolai Greenstone and a 30-foot-thick, Tertiary(?), brecciated latite dike that intrudes along the contact of the Nikolai Greenstone and the Triassic Chitistone Limestone. A sample of the sheared rock contained 0.1 part per million (ppm) gold, 1.5 ppm silver, 1,000 ppm arsenic, 200 ppm copper, and 700 ppm zinc. The deposit was explored by a short adit and opencut.
|Geologic map unit||(-143.675186376013, 61.6052438477318)|
|Mineral deposit model||Polymetallic vein (Cox and Singer, 1986; model 22c)|
|Mineral deposit model number||22c|
|Age of mineralization||Tertiary(?); the felsic dike associated with the deposit is probably Tertiary.|
|Alteration of deposit||Oxidation.|
|Workings or exploration||The deposit was explored by a short adit and opencut.|
|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., Smith, J.G., Jones, D.L., and Winkler, G.R., 1978, Geologic map of the McCarthy C-8 quadrangle, Alaska: U.S. Geological Survey Geologic Quadrangle Map GQ-1418, 1 sheet, scale 1:63,360.
|Reporters||Travis L. Hudson (Applied Geology, Inc.)|
|Last report date||1/12/2003|