Bouguer gravity anomalies in West Virginia
Conference
·
· Geol. Soc. Am., Abstr. Programs; (United States)
OSTI ID:6199667
Four regional gravity features in West Virginia primarily reflect major basement structures, intra-basement ultramafics and Alleghenian structural grain. The central West Virginia gravity high corresponds with the southern and central West Virginia basement arches. The adjacent western West Virginia gravity low correlates with Rome trough basement structure. Calculated gravity profiles, magnetics, deep well and seismic data support the relationship of the western West Virginia gravity low and central West Virginia high to thickened Rome trough sedimentary rocks, Rome trough faulting and ultramafic rocks within the central West Virginia arch. The eastern West Virginia-Virginia gravity low overlies the eastern West Virginia basement arch from Greenbrier County northward along the state line until it divides in Virginia immediately south of Pendleton County, West Virginia. The eastern bifurcation of the low parallels the Great Valley over much of its length and corresponds with tectonically thickened sedimentary rocks contained within the Martinsburg trough basement feature. The western bifurcation largely parallels the Allegheny structural front and Georges Creek syncline. A calculated gravity profile suggests the western bifurcation of the eastern West Virginia-Virginia gravity low and eastwardly adjacent Nittany high can be attributed to low density Middle-Upper Paleozoic rocks within the Georges Creek syncline and thrust fault thickened high density Cambrian - Ordovician carbonates coring Nittany anticlinorium structures. Finally, the Blue Ridge gravity gradient parallels the Blue Ridge front and overlies allochthonous Grenville age crystalline.
- Research Organization:
- Wright State Univ., Dayton, OH (USA)
- OSTI ID:
- 6199667
- Report Number(s):
- CONF-8510489-
- Conference Information:
- Journal Name: Geol. Soc. Am., Abstr. Programs; (United States) Journal Volume: 17
- Country of Publication:
- United States
- Language:
- English
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