thumbnail

Mantle fluids in the San Andreas fault system, California

Science

By:
, , , , , , ,
DOI: 10.1126/science.278.5341.1278

Links

Abstract

Fluids associated with the San Andreas and companion faults n central and south-central California have high 3He/4He ratios. The lack of correlation between helium isotopes and fluid chemistry or local geology requires that fluids enter the fault system from the mantle. Mantle fluids passing through the ductile lower crust must enter the brittle fault zone at or near lithostatic pressures; estimates of fluid flux based on helium isotopes suggest that they may thus contribute directly to fault-weakening high-fluid pressures at seismogenic depths.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Mantle fluids in the San Andreas fault system, California
Series title:
Science
DOI:
10.1126/science.278.5341.1278
Volume
278
Issue:
5341
Year Published:
1997
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Science
First page:
1278
Last page:
1281
Number of Pages:
4