| Basis for focus area |
Keene pegmatite district (Beryl Mountain), See Cameron and others (1954), Bradley, McCauley and Stillings (2017), and Meyers and Stewart (1956). |
| Identified resources |
Historical production of beryllium (beryl), feldspar, and mica. |
| Production |
Unknown. |
| Status |
Past mining. |
| Estimated resources |
Unknown. |
| Geologic maps |
Fowler-Billings (1949), scale 1:62,500; Moore (1949), scale 1:62,500; Kruger (1946), scale 1:62,500; Heald (1950), scale 1:62,500; Lyons and others (1997), scale 1:250,000. Thompson (2007); scale 1:24,000. |
| Geophysical data |
Inadequate Rank 3 and 4 (65%) aeromagnetic and Rank 5 aeroradiometric coverage. |
| Favorable rocks and structures |
Pegmatites are in quartz-mica schist containing sillimanite, adjacent to feldspathic biotite gneiss. |
| Deposits |
Beryl Mountain pegmatites (MRDS dep_id: 10150485), Colony feldspar mine (MRDS dep_id: 10125859). |
| Evidence from mineral occurrences |
MRDS. |
| Geochemical evidence |
Favorable mineralogy and rock type. |
| Geophysical evidence |
Unknown. |
| Evidence from other sources |
Unknown. |
| Cover thickness and description |
Exposed at the surface, mined to some depth. |
| Authors |
Nora K. Foley, Dwight C. Bradley, Anjana K. Shah, Gregory J. Walsh, Bernard E. Hubbard. |
| New data needs |
Detailed geologic mapping. |
| Geologic mapping and modeling needs |
Detailed mapping of pegmatite bodies, geophysics may not be useful for pegmatites. |
| Geophysical survey and modeling needs |
High resolution aeromagnetic and aeroradiometric data to assist with framework geology such as structural features and contacts. |
| Digital elevation data needs |
Lidar complete. |
