The Uranium 3 (in Selawik Hills) is a thorium and uranium 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 3 (in Selawik Hills) MRDS details
Site Name
Primary: Uranium 3 (in Selawik Hills)
Commodity
Primary: Thorium
Primary: Uranium
Secondary: Yttrium
Secondary: Niobium (Columbium)
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: Prospect
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: An unidentified red, waxy mineral is altered to goethe and limonite.
Rocks
Name: Hornblendite
Role: Host
Age Type: Host Rock
Age Young: Late Cretaceous
Name: Hornblendite
Role: Host
Age Type: Associated Rock
Age Young: Late Cretaceous
Analytical Data
Not available
Materials
Ore: Xenotime
Ore: Zircon
Gangue: Epidote
Gangue: Fluorite
Gangue: Goethite
Gangue: Limonite
Comments
Comment (Workings): Workings / Exploration = Shallow prospect pits and at least 2 drill holes are evidence of earlier exploration. The exploration apparently took place in the mid-1970's and may have been more extensive than is evident. No information is available on that exploration (Barker, 1985).
Comment (Reference): Primary Reference = Barker, 1985
Comment (Commodity): Ore Material = Unidentified Nb-U-Ti mineral
Comment (Exploration): Status = Inactive
Comment (Geology): Age = Cretaceous.
Comment (Commodity): Ore Material = Unidentified Nb-U-Ti mineral
Comment (Deposit): Model Name = Disseminated radioactive minerals in syenite.
Comment (Geology): Geologic Description = The country rock in the area of this prospect is the mid-Cretaceous Selawik Hills alkaline intrusive complex. The prospect is one of several areas of anomalous radioactivity within the complex. At this location, a zone of altered porphyritic hornblende syenite contains accessory to minor amounts of zircon, xenotime, sphene, epidote, fluorite, goethite and an unidentified red, waxy mineral. The zone is over 10 feet wide and 100 to 250 feet long. Rock sample 23R contained 734 ppm U3O8, 875 ppm Th, and 535 ppm Nb. Emission spectrographic analysis of a split of this sample indicates 0.01% La, 0.1% Nb, 0.005% Y, and 1.0% Zr. A diamond drill hole is located to the southwest of the sample site (Barker, 1985).
References
Reference (Deposit): Grybeck, D.J., 1977, Known mineral deposits of the Brooks Range, Alaska: US Geological Survey Open-File Report 77-166C, 41 p., 1 sheet, scale 1:1,000,000.
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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