Unnamed

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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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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