A rheologically layered three-dimensional model of the San Andreas Fault in central and southern California

C. A. Williams, Randall Richardson

Research output: Contribution to journalArticle

80 Citations (Scopus)

Abstract

Three-dimensional kinematic finite element models of the San Andreas Fault in central and southern California have been used to estimate the effects of rheological parameters and fault slip distribution on the horizontal and vertical deformation in the vicinity of the fault. The models include the effects of vertically layered power law viscoelastic rheology, and isostatic forces are considered in calculations of vertical uplift. Several different rheological layering schemes are used, using laboratory results on rock rheology to define the properties of the various layers. Among our San Andreas Fault models the one most consistent with current strain rate data includes aseismic slip between 20 and 40 km (H=40km) and uses assumed rheological properties from the surface to 100km depth consistent with laboratory results for wet rock samples. -from Authors

Original languageEnglish (US)
JournalJournal of Geophysical Research: Space Physics
Volume96
Issue numberB10
StatePublished - 1991
Externally publishedYes

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San Andreas Fault
Southern California
three dimensional models
rheology
Rheology
slip
Fault slips
Rocks
rocks
fault slip
strain rate
rock
Strain rate
power law
Kinematics
kinematics
uplift
estimates
effect
laboratory

ASJC Scopus subject areas

  • Earth and Planetary Sciences(all)
  • Environmental Science(all)

Cite this

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AB - Three-dimensional kinematic finite element models of the San Andreas Fault in central and southern California have been used to estimate the effects of rheological parameters and fault slip distribution on the horizontal and vertical deformation in the vicinity of the fault. The models include the effects of vertically layered power law viscoelastic rheology, and isostatic forces are considered in calculations of vertical uplift. Several different rheological layering schemes are used, using laboratory results on rock rheology to define the properties of the various layers. Among our San Andreas Fault models the one most consistent with current strain rate data includes aseismic slip between 20 and 40 km (H=40km) and uses assumed rheological properties from the surface to 100km depth consistent with laboratory results for wet rock samples. -from Authors

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