Unnamed (in Sischu Creek valley)

The Unnamed (in Sischu Creek valley) 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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MRDS mine locations are often very general, and in some cases are incorrect. Some mine remains have been covered or removed by modern industrial activity or by development of things like housing. The satellite view offers a quick glimpse as to whether the MRDS location corresponds to visible mine remains.

Site Name

Primary: Unnamed (in Sischu Creek valley)

Commodity

Primary: Uranium
Primary: Thorium

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

Not available

Rocks

Name: Rhyolite
Role: Associated
Age Type: Associated Rock
Age Young: Paleocene

Analytical Data

Not available

Materials

Not available

Comments

Comment (Reference): Primary Reference = Miller and others, 1980

Comment (Workings): Workings / Exploration = Miller and others (1980) report up to 16.5 ppm U, and 70.4 ppm Th from grab samples.

Comment (Exploration): Status = Inactive

Comment (Geology): Geologic Description = Quartz-rhyolite porphyry was found to contain anomalous thorium and uranium. Ore minerals were not identified (Miller and others, 1980; Clautice and others, 1993). Mineralization is inferred to be Early Tertiary, based on isotopic ages from Sischu Volcanic Field (Moll and others, 1980). Miller and others (1980) report up to 16.5 ppm uranium, and 70.4 ppm thorium from grab samples.

Comment (Deposit): Model Name = Volcanogenic Uranium (Cox and Singer, 1986; model no. 25f)

Comment (Geology): Age = Inferred to be Early Tertiary, based on isotopic ages from Sischu Volcanic Field (Moll and others, 1980).

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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