| Basis for focus area |
Kimberlite and lamprophyre diatremes with possible carbonatite and REE-enrichment. |
| Identified resources |
None. |
| Production |
None. |
| Status |
A kimberlite diatreme called the Homestead Kimberlite was explored as a possible diamond resource in 1999. |
| Estimated resources |
Unknown. |
| Geologic maps |
Porter and Wilde (1999); scale 1:100,000. |
| Geophysical data |
Inadequate aeromagnetic and aeroradiometric coverage. |
| Favorable rocks and structures |
Lamprophyre and kimberlite diatremes. |
| Deposits |
None. |
| Evidence from mineral occurrences |
Regional association of lamprophyre breccias and REE mineralization. |
| Geochemical evidence |
There is no known geochemical evidence for the occurrence of critical elements. |
| Geophysical evidence |
Unknown. |
| Evidence from other sources |
Unknown. |
| Comments |
Lamprophyres in the region are known to have occurrences of Ti and Cr in other districts and could be enriched in REE. Possible kimberlite-carbonatite association. Enrichment for critical minerals is inferred as there is little information from these rocks. |
| Cover thickness and description |
Surficial. |
| Authors |
Stanley L. Korzeb, Kaleb C. Scarberry, Jay A. Gunderson, Joshua M. Rosera, Allen K. Andersen. |
| New data needs |
High resolution geophysics, whole-rock geochemistry for all critical minerals, geologic mapping, lidar. |
| Geologic mapping and modeling needs |
Targeted 1:24,000 or 1:12,000 scale geologic mapping would improve understanding of geologic controls on distribution of commodities. |
| Geophysical survey and modeling needs |
High resolution airborne surveys where magmatic unconformities are suspected. |
| Digital elevation data needs |
Lidar inadequate. |
