Little Mo Mine

The Little Mo Mine is a uranium mine located in Fremont 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

Name: Little Mo Mine  

State:  Wyoming

County:  Fremont

Elevation:

Commodity: Uranium

Lat, Long: 43.41, -107.89600

Map: View on Google Maps

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.


Satelite image of the Little Mo Mine

Little Mo Mine MRDS details

Site Name

Primary: Little Mo Mine
Secondary: Arrowhead No. 1 Claim
Secondary: Arrowhead Mine
Secondary: Arrowhead #1 Claim


Commodity

Primary: Uranium


Location

State: Wyoming
County: Fremont
District: Copper Mountain uranium mining district


Land Status

Not available


Holdings

Not available


Workings

Not available


Ownership

Owner Name: Little Missouri Mining Co. (Little Mo)
Info Year: 1966
Years: 1955 -

Owner Name: Susquehannah-Western Inc.
Info Year: 1966

Owner Name: Western Nuclear Inc.


Production

Not available


Deposit

Record Type: Site
Operation Category: Past Producer
Operation Type: Surface
Mining Method: Open Pit
Year First Production: 1955
Year Last Production: 1964
Years of Production:
Organization:
Significant: N
Deposit Size: S


Physiography

General Physiographic Area: Rocky Mountain System
Physiographic Province: Middle Rocky Mountains


Mineral Deposit Model

Not available


Orebody

Not available


Structure

Not available


Alterations

Not available


Rocks

Name: Conglomerate
Role: Host
Age Type: Host Rock Unit
Age Young: Eocene

Name: Conglomerate
Role: Host
Age Type: Host Rock
Age Young: Eocene


Analytical Data

Not available


Materials

Ore: Meta-Autunite
Ore: Uranophane
Ore: Uraninite
Ore: Coffinite
Unknown: Marcasite


Comments

Comment (Location): Bull. 50 and MINOBRAS puts mine in NW4 of Sec. 29. RME-3137 and RME-3125 put it in Sec. 29. Anomaly is in SE4 of NE4 of Sec. 29. Deleted and merged records also say Sec. 28. Largest surface disturbance in the area is on the boundary of Sec. 28 and 29.


References

Reference (Deposit): USAEC-PRR-DEB-P-2-2202

Reference (Deposit): CONSV. DIV. COMP. DATE, 11-00-1958

Reference (Deposit): Gruner, J.W., Smith, D.K., Jr., and Knox, J.A., 1956, Annual REPORT FOR PERIOD APRIL 1, 1955 TO March 31, 1956. Part II: U.S. Atomic Energy Commission RME-3137, part II, 24 p.
Pages: p. 9.

Reference (Deposit): Gruner, J.W., and Smith, D.K., Jr., 1955, PROGRESS REPORT NO. 10 FOR PERIOD APRIL 1 TO OCTOBER 1, 1955: U.S. Atomic Energy Commission RME-3125, 19 p.
Pages: p. 15.

Reference (Deposit): DMEA Docket No. 4709, 1957, 654 p., http://minerals.usgs.gov/dockets/scans/wy/dmea/4709_DMEA.pdf
URL: http://minerals.usgs.gov/dockets/scans/wy/dmea/4709_DMEA.pdf

Reference (Deposit): Osterwald and others, 1966, Mineral Resources of Wyoming: Wyoming Geological Survey Bulletin 50, 287 p.
Pages: p. 213.

Reference (Deposit): AEC PRELIM FIELD INV.,AIRBORNE RA ANOM.


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