Listric thrusts in the western Transverse Ranges, California

Abstract

Research Article| July 01, 2000 Listric thrusts in the western Transverse Ranges, California Leonardo Seeber; Leonardo Seeber 1Lamont-Doherty Earth Observatory, Columbia University, Palisades, New York 10964, USA Search for other works by this author on: GSW Google Scholar Christopher C. Sorlien Christopher C. Sorlien 2Institute for Crustal Studies, University of California, Santa Barbara, California 93106, USA Search for other works by this author on: GSW Google Scholar GSA Bulletin (2000) 112 (7): 1067–1079. https://doi.org/10.1130/0016-7606(2000)112<1067:LTITWT>2.0.CO;2 Article history received: 02 Feb 1997 rev-recd: 28 Sep 1998 accepted: 21 Jul 1999 first online: 01 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share MailTo Twitter LinkedIn Tools Icon Tools Get Permissions Search Site Citation Leonardo Seeber, Christopher C. Sorlien; Listric thrusts in the western Transverse Ranges, California. GSA Bulletin 2000;; 112 (7): 1067–1079. doi: https://doi.org/10.1130/0016-7606(2000)112<1067:LTITWT>2.0.CO;2 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 Some of the main faults accommodating current shortening in the western Transverse Ranges are probably listric because (1) they are associated with progressive tilting, and (2) they may be preexisting normal faults that accommodated Miocene extension. These faults have been reactivated in the Pliocene–Quaternary transpressive regime. We propose a listric thrust model where slip is proportional to backlimb dip. This model requires relatively little fault slip to account for progressive tilting and for wide (in the dip direction) and gently dipping backlimbs. In contrast, widely applied fault-bend fold and fault-propagation fold models relate fault slip to limb width alone and typically predict more shortening by the blind thrusts that can be accounted for by folding in the cover above them. We trace the southernmost structural high in the Transverse Ranges from the Santa Monica Mountains through the southern Santa Barbara Channel. The north-dipping backlimb of this anticline is 20–30 km wide and 220 km long; its presence suggests a very large north-dipping thrust that could generate very large earthquakes. The slip rate for this fault, however, is substantially lower for a listric thrust model than for a single-step ramp-flat model. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.