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  3. Alaska Resource Data File (ARDF)

Unnamed (head of Snow Gulch)

Occurrence, Inactive

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Commodities and mineralogy

Main commodities Ag; Cu; Pb; Zn
Ore minerals chalcopyrite; galena; sphalerite
Gangue minerals calcite; quartz

Geographic location

Quadrangle map, 1:250,000-scale NB
Quadrangle map, 1:63,360-scale A-2
Latitude 62.1151
Longitude -141.8269
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is at the head of Snow Gulch, a small north tributary to Little Eldorado Creek. It is at an elevation of about 5,000 feet, 4,000 feet upstream of the mouth of Snow Gulch. The site is in the NW1/4 of section 19, T. 4 N., R. 20 E. of the Copper River Meridian. This is locality 43 of Richter and others (1975) and National Park Service locality WRST-64 (unpublished data). Cobb and Richter (1980) included this locality as an 'Unnamed occurrence'. It is located to within a few hundred feet.

Geologic setting

Geologic description

Quartz-carbonate veins that contain sphalerite, galena, and minor chalcopyrite are present in a small exposure of Jurassic or Cretaceous argillite in this small tributary to Little Eldorado Creek (Richter and Jones, 1973; Richter and others, 1975).
Geologic map unit (-141.82903228948, 62.1147426668319)
Mineral deposit model Polymetallic veins (Cox and Singer, 1986; model 22c)
Mineral deposit model number 22c
Age of mineralization Jurassic or younger as Jurassic or Cretaceous sedimentary rocks host the mineralized veins.

Production and reserves

Workings or exploration Some surface prospecting has taken place along this creek.
Indication of production None

Additional comments

The occurrence is in the Wrangell-St. Elias National Preserve.

References

MRDS Number A011414

References

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.
Richter, D.H., Singer, D.A., and Cox, D.P., 1975, Mineral resources map of the Nabesna quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-655-K, 1 sheet, scale 1:250,000.
Reporters Travis L. Hudson (Applied Geology)
Last report date 11/24/2002