Unnamed (south of Selawik Lake)

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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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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