The Snowden Creek is a copper mine located in Alaska.
About the MRDS Data:
All mine locations were obtained from the USGS Mineral Resources Data System. The locations and other information in this database have not been verified for accuracy. It should be assumed that all mines are on private property.
Mine Info
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Snowden Creek MRDS details
Site Name
Primary: Snowden Creek
Commodity
Primary: Copper
Secondary: Yttrium
Location
State: Alaska
District: Koyukuk
Land Status
Not available
Holdings
Not available
Workings
Not available
Ownership
Not available
Production
Not available
Deposit
Record Type: Site
Operation Category: Occurrence
Operation Type: Unknown
Years of Production:
Organization:
Significant:
Physiography
Not available
Mineral Deposit Model
Not available
Orebody
Not available
Structure
Not available
Alterations
Not available
Rocks
Name: Limestone
Role: Host
Age Type: Host Rock
Age Young: Late Devonian
Analytical Data
Not available
Materials
Ore: Chalcopyrite
Ore: Gypsum
Ore: Pyrite
Gangue: Calcite
Gangue: Graphite
Gangue: Quartz
Comments
Comment (Exploration): Status = Inactive
Comment (Geology): Geologic Description = This occurrence consists of: (a) a 6-inch-thick gypsum-calcite zone in shaley limestone which contains abundant fine-grained pyrite; and (b) vein quartz float that contains traces of graphite, pyrite, and chalcopyrite (Mulligan, 1974). Dillon and others (1988) mapped the country rocks as a Devonian igneous unit of diabase, gabbro, and diorite dikes and sills that is in contact with Middle Ordovician black, carbonaceous phyllite and meta-limestone. Calc-silicate hornfels occurs along the contact. Cr, Pb, Ni, and V were detected spectrographically in samples from the occurrence (Mulligan, 1974).
Comment (Reference): Primary Reference = Mulligan, 1974
References
Reference (Deposit): U.S. Bureau of Mines, 1978, Mineral appraisal of the proposed Gates of the Arctic Wilderness National Park, Alaska, A preliminary comment: U.S. Bureau of Mines Open-File Report 109-78, 29 p., 4 sheets.
Reference (Deposit): Grybeck, D.J., 1977, Known mineral deposits of the Brooks Range, Alaska: US Geological Survey Open-File Report 77-166C, 41 p., 1 sheet, scale 1:1,000,000.
Reference (Deposit): DeYoung, J.H., Jr., 1978, Mineral resources map of the Chandalar quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-878-B, 2 sheets, scale 1:250,000.
Reference (Deposit): Cobb, E.H., 1976, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Chandalar and Wiseman quadrangles, Alaska: U.S. Geological Survey Open-File Report 76-340, 205 p.
Reference (Deposit): Mulligan, J.J., 1974, Mineral resources of the Trans-Alaska Pipeline corridor: U.S. Bureau of Mines Information Circular 8626, 24 p.
Reference (Deposit): Cobb, E.H., 1972, Metallic mineral resources map of the Chandalar quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-457, 1 sheet, scale 1:250,000.
Reference (Deposit): Brosgi, W.P., and Reiser, H.N., 1964, Geologic map and section of the Chandalar quadrangle, Alaska: U.S. Geological Survey Miscellaneous Geologic Investigations Map 1-375, 1 sheet, scale 1:250,000.
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