Analysis of the age and paleomagnetic orientation of the Broadwell Mesa Basalt, Bristol Mountains, CA
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Abstract
To add to the regional paleomagnetic data documenting block rotation in eastern California, we determined the age and paleomagnetic rotation of the Broadwell Mesa basalt, a basalt in the Bristol Mountains, CA as part of an effort to constrain the timing and rotation of blocks adjacent to the fault. The east-striking sinistral Broadwell Mesa fault cuts and separates the basalt into two outcrops. An 40Ar/39Ar date from the northern outcrop yields an age of 5.46 ± 0.04 Ma. Two sites consisting of 40 paleomagnetic cores from the basalt indicate the basalt is reversely magnetized and that there has been no significant rotation (< 11º) between the two basalt outcrops.
Suggested Citation
Phelps, G., Hillhouse, J., Fleck, R.J., Miller, D., Buesch, D.C., Cyr, A.J., Schmidt, K.M., 2017, Analysis of the age and paleomagnetic orientation of the Broadwell Mesa Basalt, Bristol Mountains, CA, in ECSZ Does It: Revisiting the Eastern California Shear Zone, Zzyzx, CA, April 2017, p. 97-102.
Study Area
| Publication type | Conference Paper |
|---|---|
| Publication Subtype | Conference Paper |
| Title | Analysis of the age and paleomagnetic orientation of the Broadwell Mesa Basalt, Bristol Mountains, CA |
| Year Published | 2017 |
| Language | English |
| Publisher | Desert Studies Center, California State University at Fullerton |
| Contributing office(s) | Geology, Minerals, Energy, and Geophysics Science Center |
| Description | 6 p. |
| Larger Work Title | ECSZ Does It: Revisiting the Eastern California Shear Zone |
| First page | 97 |
| Last page | 102 |
| Conference Title | 2017 Desert Symposium |
| Conference Location | Zzyzx, CA |
| Conference Date | April 2017 |
| Country | United States |
| State | California |
| City | ZZyzx |