Uranium 4 (in Selawik Hills)

The Uranium 4 (in Selawik Hills) 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: Uranium 4 (in Selawik Hills)

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

Alteration Type: L
Alteration Text: Biotization.

Rocks

Not available

Analytical Data

Not available

Materials

Ore: Xenotime

Comments

Comment (Deposit): Model Name = Radioactive shear zone in alkaline igneous complex.

Comment (Workings): Workings / Exploration = A grab sample from this site was analyzed by the U.S. Bureau of Mines (Barker, 1985).

Comment (Reference): Primary Reference = Barker, 1985

Comment (Geology): Geologic Description = The country rock in the area of this occurrence is the mid-Cretaceous Selawik Hills alkaline intrusive complex. The occurrence is one of several areas of anomalous radioactivity within the complex. According to Barker (1985), at location I, quartz veinlets associated with lineaments tentatively identified as shear zones cut foliated syenite and monzonite. The syenite and monzonite have been partially replaced by silica and chlorite. The margins of the presumed shear zones are more intensely altered and are host to quartz veinlets up to 0.5 inch thick. Accessory xenotime was observed in a thin section of this rock. Secondary biotite is locally present. Grab sample 59R, from the biotite alteration, contained 220 ppm U3O8 and 36 ppm Th. Radiometric readings over the presumed shear zones were 1.5 to 2 times background.

Comment (Geology): Age = Cretaceous.

Comment (Exploration): Status = Inactive

References

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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