|Quadrangle map, 1:250,000-scale||NB|
|Quadrangle map, 1:63,360-scale||A-2|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||This placer gold mine is on lower Bryan Creek, 2,500 feet northwest of hill 4615 and 6,500 feet southwest of peak 6075. The site is the approximate midpoint of 3,000 feet of placer workings outlined by Richter and Jones (1973). It is in the SW1/4 of section 16, T. 3 N., R. 19 E. of the Copper River Meridian. Cobb and Richter (1980) include this mine under the name 'Bryan Cr.'. This is locality 68 of Richter and others (1975) and National Park Service locality WRST-70 (unpublished data).|
Geologic descriptionRichter and Jones (1973) show placer mine workings along about 2,500 feet of Bryan Creek. The creek was prospected in 1914 and is characterized by abundant native copper nuggets with the placer gold (Capps, 1916). The placer deposit is at least partly on a clay false bedrock. Bedrock exposed along the channel of Bryan Creek is Cretaceous volcanic and volcaniclastic rocks (Richter and Jones, 1973).
|Geologic map unit||(-141.947126420958, 62.0341302246531)|
|Mineral deposit model||Placer Au (Cox and Singer, 1986; model 39a)|
|Mineral deposit model number||39a|
|Age of mineralization||Quaternary.|
|Workings or exploration||Richter and Jones (1973) show placer mine workings along about 2,500 feet of Bryan Creek.|
|Indication of production||Yes; small|
Additional commentsThe mine is in the Wrangell-St. Elias National Preserve.
Capps, S.R., 1916, The Chisana-White River district, Alaska: U.S. Geological Survey Bulletin 630, 130 p.
Cobb, E.H., and Richter, D.H., 1980, Summaries of data on and list of references to metallic and selected nonmetallic mineral deposits in the Nabesna quadrangle, Alaska: U.S. Geological Survey Open-File Report 80-927, 117 p.
Richter, D.H., and Jones, D.L., 1973, Reconnaissance geologic map of the Nabesna A-2 quadrangle, Alaska: U.S. Geological Survey Miscellaneous Investigations Series Map I-749, 1 sheet, scale 1:63,360.
|Reporters||Travis L. Hudson (Applied Geology)|
|Last report date||11/24/2002|