|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 on the small ridge between Surprise and Sunshine creeks. It is at an elevation of about 3,700 feet, 1,000 feet northeast of the center of section 32, T. 1 S., R. 9 E. of the Copper River Meridian. This is locality 173 of MacKevett (1976) and locality 4 of MacKevett and others (1978). The location is accurate to within about 100 feet. Cobb and MacKevett (1980) included this prospect under the name 'Surprise Cr.'.|
Geologic descriptionThe deposit at this prospect consists of discontinuous quartz-calcite veins up to 8 feet thick, but commonly much thinner, that are localized along a shear zone (Moffit and Maddren, 1909; Moffit and Mertie, 1923; MacKevett, 1976). The veins contain chalcocite, bornite, chalcopyrite, and pyrite. The veins mostly cut Triassic Nikolai Greenstone although most of the country rock in the area is Jurassic granitic rock (MacKevett and others, 1978). A few short adits and numerous open cuts explore this deposit. A total of six claims were once staked end-to-end along the mineralized shear zone.
|Geologic map unit||(-143.81409360706, 61.7405426451874)|
|Mineral deposit model||Vein|
|Workings or exploration||A few short adits and numerous open cuts explore this deposit. A total of six claims were once staked end-to-end along the mineralized shear zone.|
|Indication of production||None|
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., 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.
Moffit, F.H., and Maddren, A.G., 1909, Mineral resources of the Kotsina-Chitina region, Alaska: U.S. Geological Survey Bulletin 374, 103 p.
|Reporters||Travis L. Hudson (Applied Geology, Inc.)|
|Last report date||1/12/2003|