Orr Lease

The Orr Lease is a uranium mine located in Campbell county, Wyoming.

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

Satelite View

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: Orr Lease
Secondary: Albert Orr Ranch
Secondary: KISU

Commodity

Primary: Uranium

Location

State: Wyoming
County: Campbell
District: Pumpkin Buttes

Land Status

Not available

Holdings

Not available

Workings

Not available

Ownership

Owner Name: K.I.S.U. Mining Co.
Info Year: 1958

Production

Not available

Deposit

Record Type: Site
Operation Category: Occurrence
Deposit Type: Stratabound
Operation Type: Unknown
Years of Production:
Organization:
Significant: N

Physiography

General Physiographic Area: Interior Plains
Physiographic Province: Great Plains Province
Physiographic Section: Missouri Plateau, Unglaciated

Mineral Deposit Model

Not available

Orebody

Not available

Structure

Not available

Alterations

Not available

Rocks

Name: Sandstone
Role: Host
Age Type: Host Rock
Age Young: Pliocene

Analytical Data

Not available

Materials

Not available

Comments

Comment (Production): Produced less than 100 tons as of Jan. 1958.

Comment (Deposit): UP TO .76% U OXIDE.

Comment (Development): Inactive as of 1958.

Comment (Location): Orr Ranch is east of the Orr Group (see #4 and #5 on pl. 6, in MINOBRAS, p. 18)

References

Reference (Deposit): CONSV. DIV. COMP. DATE, 10-27-1961

Reference (Deposit): USAEC-DEB-P-2-2679

Reference (Deposit): Mrak, Vernon A., 1958, Uranium deposits in the Tertiary sediments of the Powder River Basin, Wyoming: Wyoming Geological Association 13th Field Trip Guidebook, p. 233-240.
Pages: p. 236.

Reference (Deposit): MINOBRAS, 1976, Uranium Guidebook for Wyoming.
Pages: p. 17-18, #4 , #5.

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