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. |