| Basis for focus area |
Barite past producers in MRDS. |
| Identified resources |
Historical production of barite. |
| Production |
Estimated production from the Northumberland mine from 1975 to 1983 was 1,100,000 metric tonnes ore. |
| Status |
Past mining. |
| Estimated resources |
Unknown. |
| Geologic maps |
Stewart and Carlson (1978), scale 1:500,000. |
| Geophysical data |
Inadequate Rank 4 aeromagnetic and Rank 5 aeroradiometric coverage. |
| Favorable rocks and structures |
Devonian Slaven Chert Formation; thin-bedded chert, siliceous argillite, shale, with minor limestone. |
| Deposits |
Northumberland mine (MRDS dep_id: 10173775), Old Soldier mine (MRDS dep_id: 10044317), Imco properties (MRDS dep_id: 10067314), Leisa Nos. 1 and 2 (MRDS dep_id: 10125425), Orocopter Nos. 1-34 (MRDS dep_id: 10174298), P & S mine (MRDS dep_id: 10198643), Ann (MRDS dep_id: 10222512). |
| Evidence from mineral occurrences |
MRDS. |
| Geochemical evidence |
Unknown. |
| Geophysical evidence |
Unknown. |
| Evidence from other sources |
Unknown. |
| Cover thickness and description |
Exposed at the surface-open-pit mining. |
| Authors |
David A. Ponce. |
| New data needs |
Geophysics. |
| Geologic mapping and modeling needs |
Current mapping inadequate. |
| Geophysical survey and modeling needs |
High resolution, Rank 1 aeromagnetic and aeroradiometric coverage and gravity survey needed. |
| Digital elevation data needs |
Lidar inadequate. |
