The Unnamed 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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Unnamed MRDS details
Site Name
Primary: Unnamed
Commodity
Primary: Thorium
Primary: Uranium
Secondary: REE
Secondary: Cerium
Location
State: Alaska
District: McGrath
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
Model Name: Volcanogenic U
Orebody
Not available
Structure
Not available
Alterations
Alteration Type: L
Alteration Text: Limonitic.
Rocks
Name: Rhyolite
Role: Host
Age Type: Associated Rock
Age in Years: 66.300000+-2.000000
Dating Method: K-Ar
Material Analyzed: Sanadine
Age Young: Tertiary
Age Old: Late Cretaceous
Name: Rhyolite
Role: Associated
Age Type: Associated Rock
Age in Years: 66.300000+-2.000000
Dating Method: K-Ar
Material Analyzed: Sanadine
Age Young: Tertiary
Age Old: Late Cretaceous
Analytical Data
Not available
Materials
Not available
Comments
Comment (Geology): Age = Early Tertiary, based on isotopic ages of Sischu Volcanics (Moll and others, 1980).
Comment (Workings): Workings / Exploration = Miller and others (1980) report values of 24.1 ppm uranium and 117 ppm thorium from grab samples. Clautice and others (1993) report values of 115 ppm thorium, 29 ppm uranium, 230 ppm cerium, and elevated rare-earth-element values.
Comment (Geology): Geologic Description = Miller and others (1980) reported anomalous thorium and uranium from grab samples of porphyritic sanadine-rich rhyolite. Clautice and others (1993) report large sanadine crystals up to 2 cm in diameter, and abundant limonite staining. The occurrence is inferred to be Early Tertiary in age, based on isotopic ages of Sischu Volcanics (Moll and others, 1980). ? Miller and others (1980) report values of 24.1 ppm uranium and 117 ppm thorium from grab samples. Clautice and others (1993) report values of 115 ppm thorium, 29 ppm uranium, 230 ppm cerium, and elevated rare-earth-element values.
Comment (Deposit): Model Name = Volcanogenic Uranium (Cox and Singer, 1986; model no. 25f)
Comment (Reference): Primary Reference = Clautice and others, 1993
Comment (Deposit): Other Comments = See MD001.
Comment (Exploration): Status = Inactive
References
Reference (Deposit): Miller, T.P., Moll, E.J., and Patton, W.W. Jr., 1980, Uranium and thorium rich volcanic rocks of the Sischu Creek area, Medfra quadrangle, Alaska: U.S. Geological Survey Open-File Report 80-803, 27 pages.
Reference (Deposit): Clautice, K.H., Bowman, N.D., Clough, J.G., Gilbert, W.G., Kline, J.T., Smith, T.E., and Blodgett, R.B., 1993, Land selection Unit 8 (Kantishna River, Ruby, and Medfra quadrangles): References, lead isotope, geochemical and major oxide data: Alaska Division of Geological and Geophysical Surveys, 42 p., 1 sheet, scale 1:250,000.
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