The Unnamed (headwaters of Kobuk River) is a tin 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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Unnamed (headwaters of Kobuk River) MRDS details
Site Name
Primary: Unnamed (headwaters of Kobuk River)
Commodity
Primary: Tin
Secondary: Bismuth
Secondary: Arsenic
Secondary: Antimony
Secondary: Beryllium
Location
State: Alaska
District: Shungnak
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
Model Name: Sn skarn
Orebody
Not available
Structure
Not available
Alterations
Alteration Type: L
Alteration Text: Skarn.
Rocks
Not available
Analytical Data
Not available
Materials
Not available
Comments
Comment (Exploration): Status = Inactive
Comment (Geology): Age = Devonian; related to the intrusion of the Devonian pluton.
Comment (Commodity): Gangue = Calc-silcates
Comment (Deposit): Model Name = Skarn (Cox and Singer, 1986; model 14b)
Comment (Deposit): Other Comments = Located within Gates of the Arctic National Park.
Comment (Geology): Geologic Description = The occurrences consist of sparse float of vein or segregation quartz in foliated porphyritic granite of Devonian age (Nelson and Grybeck, 1980) and .of abundant skarn near the contact of the granite with Paleozoic carbonates (Nelson and Grybeck, 1981). Selected samples of float contain 5000 ppm As, 200 ppm Be, 30 to 100 Bi ppm, 200 ppm Sb, and 500 to 1000 ppm Sn. These occurrences are similar to other contact-metamorphic deposits elsewhere in the Brooks Range (Newberry and others, 1986).
Comment (Reference): Primary Reference = Grybeck and Nelson, 1981
References
Reference (Deposit): Grybeck, D.J., and Nelson, S.W., 1981, Mineral deposit map of the Survey Pass quadrangle, Brooks Range, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-1176-F, 1 sheet, scale 1:250,000.
Reference (Deposit): Newberry, R.J., Dillon, J.T., and Adams, D.D., 1986, Regionally metamorphosed calc-silicate-hosted deposits of the Brooks Range, northern Alaska: Economic Geology, v. 81, p. 1728-1752
Reference (Deposit): Nelson, S.W., and Grybeck, D.J., 1980, Geologic map of the Survey Pass quadrangle, Brooks Range, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-1176-A, 2 sheets, scale 1:250,000.
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