Tectonic implications for the along-strike variation of the Peninsular Ranges batholith, southern and Baja California

Abstract

Research Article| March 01, 2002 Tectonic implications for the along-strike variation of the Peninsular Ranges batholith, southern and Baja California Paul H. Wetmore; Paul H. Wetmore 1Department of Earth Sciences, University of Southern California, Los Angeles, California 90089, USA Search for other works by this author on: GSW Google Scholar Keegan L. Schmidt; Keegan L. Schmidt 1Department of Earth Sciences, University of Southern California, Los Angeles, California 90089, USA Search for other works by this author on: GSW Google Scholar Scott R. Paterson; Scott R. Paterson 1Department of Earth Sciences, University of Southern California, Los Angeles, California 90089, USA Search for other works by this author on: GSW Google Scholar Charles Herzig Charles Herzig 2Earth Sciences Department, El Camino College, Torrance, California 90506, USA Search for other works by this author on: GSW Google Scholar Author and Article Information Paul H. Wetmore 1Department of Earth Sciences, University of Southern California, Los Angeles, California 90089, USA Keegan L. Schmidt 1Department of Earth Sciences, University of Southern California, Los Angeles, California 90089, USA Scott R. Paterson 1Department of Earth Sciences, University of Southern California, Los Angeles, California 90089, USA Charles Herzig 2Earth Sciences Department, El Camino College, Torrance, California 90506, USA Publisher: Geological Society of America Received: 24 May 2001 Revision Received: 14 Nov 2001 Accepted: 28 Nov 2001 First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (2002) 30 (3): 247–250. https://doi.org/10.1130/0091-7613(2002)030<0247:TIFTAS>2.0.CO;2 Article history Received: 24 May 2001 Revision Received: 14 Nov 2001 Accepted: 28 Nov 2001 First Online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation Paul H. Wetmore, Keegan L. Schmidt, Scott R. Paterson, Charles Herzig; Tectonic implications for the along-strike variation of the Peninsular Ranges batholith, southern and Baja California. Geology 2002;; 30 (3): 247–250. doi: https://doi.org/10.1130/0091-7613(2002)030<0247:TIFTAS>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 SocietyGeology Search Advanced Search Abstract The Jurassic-Cretaceous Peninsular Ranges batholith of southern and Baja California exhibits several along-strike variations that are most pronounced across the Agua Blanca fault. These variations include differences in the age of magmatism, degree of inheritance in zircons, depositional environment of volcanic strata, extra-arc basin geography, lateral extent of continentally derived flysch strata, and the structures attending juxtaposition of the two segments with the North American continental margin and with each other. We propose that these variations, when taken together, imply that the two segments of the western zone currently juxtaposed by the active Agua Blanca fault were accreted to North America diachronously and did not share a common history prior to the late Early Cretaceous. The Santiago Peak arc segment north of the fault developed on oceanic lithosphere juxtaposed with the continental margin prior to and during arc magmatism. Conversely, the Alisitos arc segment developed on oceanic lithosphere exotic to North America prior to accretion at 115–108 Ma. If this model is correct, it implies that the Agua Blanca fault initiated as a transpressional continuation of the suture joining the latter arc segment to the continent and that a large portion of the forearc that existed between them was subducted. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.