Portal de Periódicos da CAPES

Slip rate of the western Garlock fault, at Clark Wash, near Lone Tree Canyon, Mojave Desert, California

2009; Geological Society of America; Volume: 121; Issue: 3-4 Linguagem: Inglês

10.1130/b26123.1

1943-2674

Sally F. McGill, Stephen G. Wells, Sarah K. Fortner, Heidi Anderson Kuzma, John D. McGill,

Seismic Waves and Analysis

Research Article| March 01, 2009 Slip rate of the western Garlock fault, at Clark Wash, near Lone Tree Canyon, Mojave Desert, California Sally F. McGill; Sally F. McGill † 1Department of Geological Sciences, California State University, San Bernardino, 5500 University Parkway, San Bernardino, California 92407-2397, USA †E-mail: smcgill@csusb.edu Search for other works by this author on: GSW Google Scholar Stephen G. Wells; Stephen G. Wells 2Desert Research Institute, PO Box 60220, Reno, Nevada 89506-0220, USA Search for other works by this author on: GSW Google Scholar Sarah K. Fortner; Sarah K. Fortner 3Department of Geology and Geophysics, University of Wisconsin-Madison, 1215 W Dayton St., Madison, Wisconsin 53706, USA 5*Now at School of Earth Sciences, The Ohio State University, 275 Mendenhall Laboratory, 125 S. Oval Mall, Columbus, Ohio 43210, USA Search for other works by this author on: GSW Google Scholar Heidi Anderson Kuzma; Heidi Anderson Kuzma 1Department of Geological Sciences, California State University, San Bernardino, 5500 University Parkway, San Bernardino, California 92407-2397, USA 6**Now at Department of Civil and Environmental Engineering, 760 Davis Hall, University of California, Berkeley, California, 94720-1710, USA Search for other works by this author on: GSW Google Scholar John D. McGill John D. McGill 4Department of Physics, California State University, San Bernardino, 5500 University Parkway, San Bernardino, California 92407-2397, USA Search for other works by this author on: GSW Google Scholar GSA Bulletin (2009) 121 (3-4): 536–554. https://doi.org/10.1130/B26123.1 Article history received: 17 Oct 2006 rev-recd: 27 Jun 2008 accepted: 16 Jul 2008 first online: 02 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Sally F. McGill, Stephen G. Wells, Sarah K. Fortner, Heidi Anderson Kuzma, John D. McGill; Slip rate of the western Garlock fault, at Clark Wash, near Lone Tree Canyon, Mojave Desert, California. GSA Bulletin 2009;; 121 (3-4): 536–554. doi: https://doi.org/10.1130/B26123.1 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 SocietyGSA Bulletin Search Advanced Search Abstract The precise tectonic role of the left-lateral Garlock fault in southern California has been controversial. Three proposed tectonic models yield significantly different predictions for the slip rate, history, orientation, and total bedrock offset as a function of distance along strike. In an effort to test these models, we present the first slip-rate estimate for the western Garlock fault that is constrained by radiocarbon dating. A channel (referred to here as Clark Wash) incised into a Latest Pleistocene alluvial fan has been left-laterally offset at least 66 ± 6 m and no more than 100 m across the western Garlock fault, indicating a left-lateral slip rate of 7.6 mm/yr (95% confidence interval of 5.3–10.7 mm/yr) using dendrochronologically calibrated radiocarbon dates. The timing of aggradational events on the Clark Wash fan corresponds closely to what has been documented elsewhere in the Mojave Desert, suggesting that much of this activity has been climatically controlled. The range-front fault, located a few hundred meters northwest of the Gar-lock fault, has probably acted primarily as a normal fault, with a Holocene rate of dip-slip of 0.4–0.7 mm/yr. The record of prehistoric earthquakes on the Garlock fault at this site, though quite possibly incomplete, suggests a longer interseismic interval (1200–2700 yr) for the western Garlock fault than for the central Garlock fault.The relatively high slip rate determined here indicates that the western and central segments of the Garlock fault show similar rates of movement that are somewhat faster than rates inferred from geodetic data. The high rate of motion on the western Garlock fault is most consistent with a model in which the western Garlock fault acts as a conjugate shear to the San Andreas fault. Other mechanisms, involving extension north of the Garlock fault and block rotation at the eastern end of the fault may be relevant to the central and eastern sections of the fault, but they cannot explain a high rate of slip on the western Garlock fault. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.