How much can off-fault deformation contribute to the slip rate discrepancy within the eastern California shear zone?

Research Article| January 01, 2014 How much can off-fault deformation contribute to the slip rate discrepancy within the eastern California shear zone? Justin W. Herbert; Justin W. Herbert 1Department of Geosciences, University of Massachusetts, Amherst, Massachusetts 01003, USA Search for other works by this author on: GSW Google Scholar Michele L. Cooke; Michele L. Cooke 1Department of Geosciences, University of Massachusetts, Amherst, Massachusetts 01003, USA Search for other works by this author on: GSW Google Scholar Michael Oskin; Michael Oskin 2Department of Earth and Planetary Sciences, University of California, Davis, California 95616, USA Search for other works by this author on: GSW Google Scholar Ohilda Difo Ohilda Difo 1Department of Geosciences, University of Massachusetts, Amherst, Massachusetts 01003, USA Search for other works by this author on: GSW Google Scholar Geology (2014) 42 (1): 71–75. https://doi.org/10.1130/G34738.1 Article history received: 15 May 2013 rev-recd: 15 Sep 2013 accepted: 19 Sep 2013 first online: 09 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share MailTo Twitter LinkedIn Tools Icon Tools Get Permissions Search Site Citation Justin W. Herbert, Michele L. Cooke, Michael Oskin, Ohilda Difo; How much can off-fault deformation contribute to the slip rate discrepancy within the eastern California shear zone?. Geology 2014;; 42 (1): 71–75. doi: https://doi.org/10.1130/G34738.1 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGeology Search Advanced Search Abstract Kinematic assumptions of geodetic inversions for fault slip require that the slip sums to the (plate) boundary velocity. This assumption neglects permanent off-fault deformation, which could account for discrepancies between geologic and geodetic estimates. We use three-dimensional mechanical models to assess if unaccounted permanent strain surrounding faults could contribute to slip rate discrepancies across disconnected faults within the Mojave Desert (California, USA) portion of the eastern California shear zone (ECSZ). We modified fault configurations derived from the Southern California Earthquake Center Community Fault Model to better represent the disconnected nature of active faults in the ECSZ south of the Garlock fault. The models with revised fault geometry produce slip rates that better match geologic strike-slip rates, thus validating the revisions. Within these models, off-fault deformation accounts for 40% ± 23% of the total strain across the ECSZ. This suggests that a significant portion of the discrepancy between the geologic and geodetically modeled slip rates in the ECSZ could be due to the geodetic inversion model assumption of zero permanent off-fault deformation. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.