| Basis for focus area |
Cluster of germanium-bearing uranium occurrences in the Fall Creek coal area of southeastern Idaho. |
| Identified resources |
Identified resources for uranium. |
| Production |
None. |
| Status |
Unknown. |
| Estimated resources |
Estimate of 1,3000 short tons of U in about 6.5 million short tons of coaly shale, carbonaceous shale, and carbonaceous limestone (Vine, 1959). |
| Geologic maps |
Mitchell and Bennett (1979a), scale 1:250,000; Jobin and Schroeder (1964), scale 1:24,000. |
| Geophysical data |
Inadequate Rank 5 aeromagnetic data; rank 4 aeroradiometric data. |
| Favorable rocks and structures |
Most of the U-bearing rocks are restricted to a single stratigraphic zone in the upper part of the Bear River Formation, which is present throughout much of the northern part of the Caribou Mountains (Vine, 1959). |
| Deposits |
Fall Creek coal mine (MRDS dep_id: 10089388). |
| Evidence from mineral occurrences |
MRDS; analyses for U and Ge (Vine, 1959). |
| Geochemical evidence |
Anomalous Ge and Mo correlate with U (Vine, 1959). |
| Geophysical evidence |
None. |
| Evidence from other sources |
None. |
| Cover thickness and description |
Exposed at the surface and traced to depth. |
| Authors |
Reed S. Lewis, Virginia S. Gillerman, Christopher A. Tate, Jane M. Hammarstrom. |
| New data needs |
Geochemistry (especially Ge concentrations), geologic mapping, geophysics. |
| Geologic mapping and modeling needs |
Only one quadrangle in this areas is mapped at a scale of 1:24,000. |
| Geophysical survey and modeling needs |
High resolution, Rank 1 aeromagnetic and aeroradiometric coverage. |
| Digital elevation data needs |
Lidar in progress. |
