Dubois Quadrangle, Idaho and Montana
Within the Dubois Quadrangle (Idaho and Montana), environments favorable for uranium deposits, based on National Uranium Resource Evaluation criteria, occur in the McGowan Creek Formation and within some Tertiary sedimentary basins. The Mississippian McGowan Creek Formation consists of uraniferous, black, siliceous mudstone and chert with minor porous sedimentary channels. In the southern Beaverhead Mountains it has been fractured by a bedding-plane fault, and uranium has been further concentrated by circulating groundwater in the porous channels and brecciated zones, both of which contain about 200 ppM uranium. The northern parts of the Pahsimeroi River, Lemhi River, Medicine Lodge Creek, Horse Prairie, and Sage Creek Basins are considered favorable for sandstone-type uranium deposits. Evidence present includes suitable source rocks such as rhyolitic flow breccia, laharic deposits, or strongly welded tuffs; permeable sediments, including most sandstones and conglomerates, providing they do not contain devitrified glass; suitable reductants such as lignite, pyrite, or low-Eh geothermal water; and uranium occurrences.
- Research Organization:
- Geoexplorers International, Inc., Denver, CO (USA)
- DOE Contract Number:
- AC13-76GJ01664
- OSTI ID:
- 6344144
- Report Number(s):
- GJQ-008(81); ON: DE81024328
- Country of Publication:
- United States
- Language:
- English
Similar Records
Favorability for uranium in tertiary sedimentary rocks, southwestern Montana
Style of Cenozoic extensional deformation in the central Beaverhead Mountains, Idaho-Montana
Related Subjects
11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS
DATA
GEOCHEMICAL SURVEYS
GEOLOGIC DEPOSITS
GEOLOGY
GEOPHYSICAL SURVEYS
GROUND WATER
HYDROGEN COMPOUNDS
IDAHO
INFORMATION
MINERAL RESOURCES
MONTANA
NORTH AMERICA
NUMERICAL DATA
OXYGEN COMPOUNDS
PACIFIC NORTHWEST REGION
PROSPECTING
RADIOMETRIC SURVEYS
RESOURCES
ROCKY MOUNTAIN REGION
SEDIMENTS
STATISTICAL DATA
SURFACE WATERS
SURVEYS
URANIUM DEPOSITS
USA
WATER