| Basis for focus area |
The focus area is based on the outline from Krahulec (2018b) but is refined to focus on the placer deposits in the north and south of the district. |
| Identified resources |
Unknown. |
| Production |
Unknown. |
| Status |
Past exploration. |
| Estimated resources |
~300,000 tons at average grade of 9.6% TiO2 and 3% ZrO2 (Krahulec, 2018b). |
| Geologic maps |
Hintze (1980), scale 1:500,000. |
| Geophysical data |
Inadequate aeromagnetic and aeroradiometric coverage. |
| Favorable rocks and structures |
Titanium-Zr occurrences are in the John Henry Member of the Upper Cretaceous Straight Cliffs Formation. The better paleoplacer deposits developed in swash zones during regressive phases. The Straight Cliffs Formation has been folded into a series of open, upright, north-northwest-trending anticlines and synclines (Force and Creely, 2000). The heavy mineral concentrations generally occur in small, red-brown, elongate lenses from 3 to 15 ft thick, 100 to 300 ft wide, and 300 to 3500 ft long. |
| Deposits |
Mann-Longshot, Calf Creek (MRDS dep_id: 10015475). |
| Evidence from mineral occurrences |
MRDS; UMOS (Utah Geological Survey, 2021); Krahulec (2018b). |
| Geochemical evidence |
No data. |
| Geophysical evidence |
None. |
| Evidence from other sources |
Krahulec (2018b), Mills and Rupke (2020). |
| Comments |
Possible Ta from tantalite-columbite accumulation. |
| Cover thickness and description |
Exposed at the surface. |
| Authors |
Stephanie Mills. |
| New data needs |
None requested at this time. |
| Geologic mapping and modeling needs |
None requested at this time. |
| Geophysical survey and modeling needs |
None requested at this time. |
| Digital elevation data needs |
Lidar complete. |
