| Basis for focus area |
Buffered point for Little Friar Mountain pegmatite mine location. |
| Identified resources |
Historical production of gemstones. |
| Production |
Unknown. |
| Status |
Past mining of allanite for mineral specimens. |
| Estimated resources |
Unknown, but considered a small deposit. |
| Geologic maps |
Werner (1965), scale 1:62,500. |
| Geophysical data |
Inadequate Rank 4 aeromagnetic and Rank 5 aeroradiometric coverage. |
| Favorable rocks and structures |
Pegmatitic deposits in hypersthene granodiorite. |
| Deposits |
Little Friar Mountain mine (MRDS dep_id: 10080104; USMIN Site_id: VA00009). |
| Evidence from mineral occurrences |
MRDS; USMIN. |
| Geochemical evidence |
Allanite analysis: 40% SiO2, 17.024% Total Fe, 12.44% Al2O3, 6.5% Ce metal, 6.42% Y metal. Fergunsonite analysis: 48.66% Nb2O5, 2.09% Zr02, 27.94% Er2O3-Y2O3, 1.37% Ce2O3, 3.92% La2O3, 4.6% Dy2O3 (MRDS). |
| Geophysical evidence |
Unknown. |
| Evidence from other sources |
Unknown. |
| Comments |
Known producer but limited spatial extent. Benefit of geophysical surveys not known. |
| Cover thickness and description |
Cover less than 100 m? |
| Authors |
Anjana K. Shah. |
| New data needs |
Geologic mapping. |
| Geologic mapping and modeling needs |
Geologic mapping of pegmatites. |
| Geophysical survey and modeling needs |
Aeromagnetic data expected to image mafic rocks and associated structures, radiometric data can help with geologic mapping in vegetated terrane; alteration may be imaged. Electromagnetic methods may help image sulfides. |
| Digital elevation data needs |
Lidar mostly complete; small portion in progress. |
