Skip to main content
U.S. Department of Energy
Office of Scientific and Technical Information

Radioactive mineral deposits of Wyoming

Book ·
OSTI ID:5952031
Uranium deposits in Wyoming are known to occur in rocks of pre-Cambrian age and at least 33 different formations ranging in age from Cambrian to Pliocene. Most of the curent production comes from the Eocene Wind River formation in the Gas Hills area of Fremont and Natona counties. Additional production comes from the Madison formation (Mississippian) in Big Horn County, the Fall River and Lakota formations (Lower Cretaceous) in Crook County, the Wasatch formation (Eocene) in Campbell, Converse, and Johnson counties, and the Browns Park formation (Miocene) in Carbon County. Thorium and rare earth mineralization in Wyoming occurs in pegmatites and veins in rocks of pre-Cambian age; in consolidated placer-type deposits of Middle Cambrian, late Cretaceous, and Tertiary ages; and in Quaternary alluvial deposits. Euxenite is mined from a pegmatite in Carbon County.
OSTI ID:
5952031
Report Number(s):
NP-24149
Country of Publication:
United States
Language:
English