Response of deformation patterns to reorganization of the southern San Andreas fault system since ca. 1.5 Ma

摘要: Abstract Between ~ 1.5 and 1.1 Ma, the southern San Andreas fault system underwent a major reorganization that included initiation of Jacinto zone termination slip on extensional West Salton detachment fault. The itself has also evolved since this time, with several shifts in activity among strands within Gorgonio Pass. We use three-dimensional mechanical Boundary Element Method models to investigate impact these changes network deformation patterns. A series snapshot succession active geometries explore role interaction tectonic loading abandonment fault, zone, Interpreted uplift patterns are well matched by model results. These results support idea growth led increased rates Gabriel Mountains decreased Bernardino Mountains. Comparison for vertical-axis rotation data from paleomagnetic studies reveals good match local Mecca Hills Borrego Badlands. efficiency at each step modeled evolution, find an overall trend toward through time. Strain energy density used identify regions incipient faulting, notion north-to-south propagation during its initiation.