DEEP RESISTIVITY INVESTIGATIONS IN THE CONTINENTAL UNITED STATES.
Final scientific rept.,
GEOSCIENCE INC CAMBRIDGE MASS
Pagination or Media Count:
Deep resistivity measurements were carried out to sample deep resistivities of precambian rocks in northern New York, southeastern Massachusetts, southeastern Pennsylvania, west central Virginia, central and western North Carolina, southeastern Missouri, western Oklahoma, central Colorado, southwestern Wyoming, southern Montana, northeastern North Dakota, central Wisconsin, and southeastern Nebraska. In addition, very large scale regional resistivity surveys were conducted in the Pacific Northwest and the extreme southwestern United States. No basement resistivities greater than 100,000 ohm-meters could be definitely established. Basement rocks were found to exhibit wide variations in electrical properties. Faults, fractures, etc. affect the bulk resistivity of the basement to a greater extent than do geologic variations. Since these features are so common, we believe it unlikely that bulk resistivities greater than 100,000 ohm-meters can be found over extensive areas within 10 kilometers of the earths surface. Author
- Geology, Geochemistry and Mineralogy