Okpilak River

The Okpilak River is a uranium and molybdenum 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

Satelite View

MRDS mine locations are often very general, and in some cases are incorrect. Some mine remains have been covered or removed by modern industrial activity or by development of things like housing. The satellite view offers a quick glimpse as to whether the MRDS location corresponds to visible mine remains.

Site Name

Primary: Okpilak River

Commodity

Primary: Uranium
Primary: Molybdenum
Secondary: Fluorine-Fluorite
Secondary: REE

Location

State: Alaska
District: Canning

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: Granite
Role: Host
Age Type: Host Rock
Age Young: Early Devonian

Name: Granite
Role: Host
Age Type: Associated Rock
Age Young: Early Devonian

Analytical Data

Not available

Materials

Ore: Molybdenite
Gangue: Fluorite

Comments

Comment (Exploration): Status = Inactive

Comment (Workings): Workings / Exploration = None

Comment (Deposit): Model Name = Disseminated, felsic-hosted

Comment (Geology): Geologic Description = Fluorite, molybdenite and (?)yttrocerite occur in samples of granite of Okpilak batholith. Representative sample in peripheral zone of granite contains 50 ppm eU. Heavy mineral fractions of concentrates contain 0.034-0.080% eU and 0.010-0.033% U.

Comment (Commodity): Gangue = yttrocerite

Comment (Geology): Age = Probably Early Devonian

References

Reference (Deposit): Cobb, E.H., Mayfield, C.F., and Brosg?, W.P., 1981, Summaries of data on and lists of references to metallic and selected nonmetallic mineral occurrences in eleven quadrangles in northern Alaska (Arctic, Baird Mountains, Chandler Lake, DeLong Mountains, Demarcation Point, Howard Pass, Misheguk Mountain, Mount Michelson, Noatak, Point Lay, and Table Mountain); Supplement to Open-File Report 75-628; Part A, Summaries of data to January 1, 1981: U.S. Geological Survey Open-File Report 81-767-A, 25 p.

Reference (Deposit): Cobb, E.H., Mayfield, C.F., and Brosge, W.P., 1981, Summaries of data on and lists of references to metallic and selected nonmetallic mineral occurrences in eleven quadrangles in northern Alaska (Arctic, Baird Mountains, Chandler Lake, DeLong Mountains, Demarcation Point, Howard Pass, Misheguk Mountain, Mount Michelson, Noatak, Point Lay, and Table Mountain); Supplement to Open-File Report 75-628; Part A, Summaries of data to January 1, 1981: U.S. Geological Survey Open-File Report 81-767-A, 25 p.

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