| Basis for focus area |
Extent of the Westminster Terrane in Maryland. |
| Identified resources |
Historical production of copper, gold, lead, silver and zinc. |
| Production |
None. |
| Status |
Past mining. |
| Estimated resources |
Unknown. |
| Geologic maps |
Southworth and others (2008), scale 1:100,000; Lyttle and others (2017), scale 1:100,000; Cloos and Cooke (1953), scale 1:62,500; Crowley and others (1976), scale 1:62,500; Edwards (1993), scale 1:62,500; Higgins and Conant (1990), scale 1:62,500; Jonas (1928), scale 1:62,500; Southwick and Owens (1968), scale 1:62,500; Froelich (1975), scale 1:62,500; Kuff (1981), scale 1:24,000. |
| Geophysical data |
Inadequate aeromagnetic and aeroradiometric coverage. |
| Favorable rocks and structures |
Metavolcanic units of the Westminster Terrane, Maryland (lumps, small bands, stringers, and veins typically in brecciated and crushed marble adjacent to contacts with metabasalt). |
| Deposits |
Roop mine (Zn, Cu) (MRDS dep_id: 10083916), Unionville (Zn, Cu) (MRDS dep_id: 10083915), Cox mines (Cu, Ag, Zn, Pb) (MRDS dep_id: 10121374), Mountain View mine (Cu, Au, Pb, Ag, Zn) (MRDS dep_id: 10194680). |
| Evidence from mineral occurrences |
MRDS. |
| Geochemical evidence |
Favorable mineralogy and rock type. |
| Geophysical evidence |
Unknown. |
| Evidence from other sources |
Unknown. |
| Cover thickness and description |
Variable. |
| Authors |
David K. Brezinski. |
| New data needs |
Geophysical data. |
| Geologic mapping and modeling needs |
Unknown. |
| Geophysical survey and modeling needs |
High resolution aeromagnetic and aeroradiometric coverage. |
| Digital elevation data needs |
Lidar complete in northern and southern parts of focus area; incomplete in central area. |
