Physics
Scientific paper
Aug 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001georl..28.3087l&link_type=abstract
Geophysical Research Letters, Volume 28, Issue 16, p. 3087-3090
Physics
3
Geodesy And Gravity: Local Gravity Anomalies And Crustal Structure, Tectonophysics: Continental Tectonics-General, Tectonophysics: Tomography, Information Related To Geographic Region: North America
Scientific paper
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.
Hauksson Egill
Langenheim V. E.
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