The Unnamed (south of Selawik Lake) is a uranium and thorium 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 (south of Selawik Lake) MRDS details
Site Name
Primary: Unnamed (south of Selawik Lake)
Commodity
Primary: Uranium
Primary: Thorium
Location
State: Alaska
District: Selawik
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
Not available
Analytical Data
Not available
Materials
Ore: Zircon
Comments
Comment (Reference): Primary Reference = Barker, 1985
Comment (Geology): Age = Cretaceous.
Comment (Exploration): Status = Inactive
Comment (Workings): Workings / Exploration = The area was visited by U.S. Geological Survey geologists and the U.S. Bureau of Mines. Several rock and stream sediment samples were collected from the area.
Comment (Geology): Geologic Description = The country rocks in the area of this occurrence consist of the mid-Cretaceous Selawik lake and Inland Lake alkaline intrusive complexes. There are three types of radioactive occurrences in the Selawik Lake complex: quartz veins associated with a fault zone; lamprophyre dikes; and radioactive zones in nephline syenite. According to Barker (1985), at location O, boulders of medium-grained syenite displayed up to 4 times the background radioactivity. Chip sample 4R contained 123 ppm U3O8 and 380 ppm Th. Pronounced metamict halos surrounding zircon grains in biotite suggest that at least some of the radioactive material is in the zircon. A fine-grained syenite intermixed with rubble at this location contained 36 ppm U3O8 and 91 ppm Th.
Comment (Deposit): Model Name = Radioactive occurrences in syenite and nepheline syenite.
References
Reference (Deposit): Miller, T.P. and Bunker, C.M., 1975, Uranium, thorium and potassium analyses of selected plutonic rocks from west central Alaska: U.S. Geological Survey Open-File Report 75-216, 5p.
Reference (Deposit): Cobb, E.H., and Miller, T.P., 1981, Summaries of data on and lists of references to metallic and selected nonmetallic mineral occurrences in the Hughes, Kotzebue, Melozitna, Selawik and Shungnak quadrangles, west-central Alaska; Supplement to Open-File Report 75-627; Part A, Summaries to January 1, 1981: U.S. Geological Survey Open-File Report 81-847-A, 14 p.
Reference (Deposit): Cobb, E.H., and Miller, T.P., 1981, Summaries of data on and lists of references to metallic and selected nonmetallic mineral occurrences in the Hughes, Kotzebue, Melozitna, Selawik and Shungnak quadrangles, west-central Alaska; Supplement to Open-File Report 75-627; Part B, Lists of references to January 1, 1981: U.S. Geological Survey Open-File Report 81-847-B, 14 p.
Reference (Deposit): Barker, J.C., 1985, Sampling and analytical results of a mineral reconnaissance in the Selawik Hills area, northwestern Alaska: U.S. Bureau of Mines Open-File Report 43-85, 67 p.
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