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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Uranium 4 (in Selawik Hills) MRDS details
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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