Present day kinematics of the Eastern California shear zone from a geodetically constrained block model

Details Present day kinematics of the Eastern California shear zone from a geodetically constrained block model Present day kinematics of the Eastern California shear zone from a geodetically constrained block model

Sep 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001georl..28.3369m&link_type=abstract

Geophysical Research Letters, Volume 28, Issue 17, p. 3369-3372

Physics

43

Geodesy And Gravity: Crustal Movements-Intraplate, Geodesy And Gravity: Space Geodetic Surveys, Tectonophysics: Continental Neotectonics, Tectonophysics: Continental Tectonics-General

Scientific paper

We use Global Positioning System (GPS) data from 1993-2000 to determine horizontal velocities of 65 stations in eastern California and western Nevada between 35° and 37°N. We relate the geodetic velocities to fault slip rates using a block model that enforces path integral constraints over geologic and geodetic time scales and that includes the effects of elastic strain accumulation on faults locked to a depth of 15 km. The velocity of the Sierra Nevada block with respect to Nevada is 11.1+/-0.3mm/yr, with slip partitioned across the Death Valley, (2.8+/-0.5mm/yr), Panamint Valley (2.5+/-0.8mm/yr), and Airport Lake/Owens Valley (5.3+/-0.7/4.6+/-0.5mm/yr) faults. The western Mojave block rotates at 2.1+/-0.8°/My clockwise, with 3.7+/-0.7mm/yr of left lateral motion across the western Garlock Fault. We infer 11+/-2mm/yr of right lateral motion across the Mojave region of the Eastern California Shear Zone.

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