| Basis for focus area |
Devonian black shales of the Marcellus Formation with potential for V. Results from early exploration programs indicate that V grades for deposits within mafic and ultramafic complexes in this region. |
| Identified resources |
Unknown. |
| Production |
Unknown. |
| Status |
Unknown. |
| Estimated resources |
Unknown. |
| Geologic maps |
Horton and others (2017), scale 1:500,000; Miles (2003), scale 1:500,000; Rickard and others (1970), scale 1:250,000; Slucher and others (2006), scale 1:500,000; Cardwell and others (1968), scale 1:250,000. |
| Geophysical data |
Inadequate Rank 4 aeromagnetic and Rank 5 aeroradiometric coverage. |
| Favorable rocks and structures |
Devonian-age black shales. |
| Deposits |
None. |
| Evidence from mineral occurrences |
Unknown. |
| Geochemical evidence |
Preliminary soil and sediment maps of the United States (Smith and others, 2015) show arcuate highs for a range of elements, including Co, Mo, Ni, and V in Devonian black shales. |
| Geophysical evidence |
Inadequate aeromagnetic/radiometric data: aeromagnetic data rank 4; radiometric rank 5. |
| Evidence from other sources |
Unknown. |
| Comments |
Because many V-rich carbonaceous shales also contain high U concentrations, downhole geophysical techniques (gamma logs) may be useful in identifying the position of metalliferous shales. |
| Cover thickness and description |
Outcrop and subcrop is the area of interest. |
| Authors |
Nora K. Foley, Clinton Scott, Dane S. VanDervoort, John P. Whitmore. |
| New data needs |
Geophysical data and geochemical analyses. |
| Geologic mapping and modeling needs |
Geologic mapping. |
| Geophysical survey and modeling needs |
High resolution aeromagnetic and aeroradiometric coverage. Aeromagnetic and aeroradiometric data can assist with framework geology such as structural features and contacts. |
| Digital elevation data needs |
Lidar variable across this large focus area -- either complete or in progress. |
