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Comparision between crustal density and velocity variations in Southern California

Geophysical Research Letters

By:
and
DOI: 10.1029/2001GL013392

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Abstract

We predict gravity from a three-dimensional Vp model of the upper crust and compare it to the observed isostatic residual gravity field. In general this comparison shows that the isostatic residual gravity field reflects the density variations in the upper to middle crust. Both data sets show similar density variations for the upper crust in areas such as the Peninsular Ranges and the Los Angeles basin. Both show similar variations across major faults, such as the San Andreas and Garlock faults in the Mojave Desert. The difference between the two data sets in regions such as the Salton Trough, the Eastern California Shear Zone, and the eastern Ventura basin (where depth to Moho is <30 km), however, suggests high-density middle to lower crust beneath these regions. Hence the joint interpretation of these data sets improves the depth constraints of crustal density variations.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Comparision between crustal density and velocity variations in Southern California
Series title:
Geophysical Research Letters
DOI:
10.1029/2001GL013392
Volume
28
Issue:
16
Year Published:
2001
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Geophysical Research Letters
First page:
3087
Last page:
3090
Number of Pages:
4