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.

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Additional publication details

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