Magnetotelluric soundings in the southwestern United States
Geophysics
By: Donald Plouff
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Abstract
Twelve magnetotelluric soundings were made along a 460-mile traverse in the southwestern United States. Spectral analysis of digitized graphic records was used to determine apparent resistivities and phase differences for periods in the range 10-1,000 sec. The geoelectric section to depths of the order of 300 km was found to be divided into three principal layers. The layer nearest the surface has a resistivity of 200 ohm-m or less. The next layer, which begins in Paleozoic carbonate rock or near the top of the Precambrian rocks, has a resistivity of 500 ohm-m or more. The resistivity of the lowest layer is in the range 5-100 ohm-m and the depth to the top is in the range 20-150 km.
Study Area
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Magnetotelluric soundings in the southwestern United States |
| Series title | Geophysics |
| DOI | 10.1190/1.1439845 |
| Volume | 31 |
| Issue | 6 |
| Year Published | 1966 |
| Language | English |
| Publisher | GeoScienceWorld |
| Contributing office(s) | Geology, Minerals, Energy, and Geophysics Science Center |
| Description | 8 p. |
| First page | 1145 |
| Last page | 1152 |
| Country | United States |
| State | Arizona, Utah |
| Other Geospatial | Southwestern United States |