| Basis for focus area |
Magmatic syenite currently produced from multiple quarries. The focus area outlines the underlying syenite complex. |
| Identified resources |
None. |
| Production |
None. |
| Status |
Current mining of syenite for construction materials. |
| Estimated resources |
Unknown. |
| Geologic maps |
Haley and Stone (2000, 2001), scale 1:24,000. |
| Geophysical data |
Inadequate (Rank 4 and 5) aeromagnetic and aeroradiometric coverage. |
| Favorable rocks and structures |
Nepheline syenite. |
| Deposits |
Granite Mountain Quarries, 3M Quarry. |
| Evidence from mineral occurrences |
Known occurrences of nepheline syenite with a region that also includes carbonatitic rocks of the Magnet Cove intrusive complex. |
| Geochemical evidence |
Enrichment of REE in bauxite developed on weathered nepheline syenite is consistent with potential for REE in the parent rock. |
| Geophysical evidence |
None. |
| Evidence from other sources |
Haley and Stone (2000); Haley and Stone (2001). |
| Cover thickness and description |
Outcrops to unknown depths under younger sedimentary rocks. |
| Authors |
Bradley S. Van Gosen. |
| New data needs |
High resolution geophysical surveys to map covered intrusives, geochemistry. |
| Geologic mapping and modeling needs |
None. |
| Geophysical survey and modeling needs |
Aeroradiometric survey to better define the syenite intrusion; Geophysical modeling of depth to syenite bedrock. |
| Digital elevation data needs |
Lidar adequate. |
