Oceanic-ridge subduction vs. slab break off: Plate tectonic evolution along the Baja California Sur continental margin since 15 Ma

Abstract

Research Article| January 01, 2006 Oceanic-ridge subduction vs. slab break off: Plate tectonic evolution along the Baja California Sur continental margin since 15 Ma F. Michaud; F. Michaud 1Géosciences Azur (UPMC-IRD-CNRS), BP48, 06235, Villefranche/Mer, France Search for other works by this author on: GSW Google Scholar J.Y. Royer; J.Y. Royer 2CNRS-UBO Domaines Océaniques, Place Copernic, 29280 Plouzané, France Search for other works by this author on: GSW Google Scholar J. Bourgois; J. Bourgois 3Géosciences Azur (UPMC-IRD-CNRS), BP48, 06235, Villefranche/Mer, France Search for other works by this author on: GSW Google Scholar J. Dyment; J. Dyment 4Institut de Physique du Globe de Paris, 4 place Jussieu, 75252 Paris, France Search for other works by this author on: GSW Google Scholar T. Calmus; T. Calmus 5Instituto de Geología, Universidad Nacional Autónoma de México, AP 1039, 83000, Hermosillo, Sonora, Mexico Search for other works by this author on: GSW Google Scholar W. Bandy; W. Bandy 6Instituto de Geofisica, Universidad Nacional Autónoma de México, Ciudad Universitaria, 04510 Mexico D.F Search for other works by this author on: GSW Google Scholar M. Sosson; M. Sosson 7Géosciences Azur (UPMC-IRD-CNRS), BP48, 06235, Villefranche/Mer, France Search for other works by this author on: GSW Google Scholar C. Mortera-Gutiérrez; C. Mortera-Gutiérrez 8Instituto de Geofisica, Universidad Nacional Autónoma de México, Ciudad Universitaria, 04510 Mexico D.F Search for other works by this author on: GSW Google Scholar B. Sichler; B. Sichler 9Ifremer, BP 70, 29280 Plouzané, France Search for other works by this author on: GSW Google Scholar M. Rebolledo-Viera; M. Rebolledo-Viera 10Instituto de Geofisica, Universidad Nacional Autónoma de México, Ciudad Universitaria, 04510 Mexico D.F Search for other works by this author on: GSW Google Scholar B. Pontoise B. Pontoise 11Géosciences Azur (UPMC-IRD-CNRS), BP48, 06235, Villefranche/Mer, France Search for other works by this author on: GSW Google Scholar Geology (2006) 34 (1): 13–16. https://doi.org/10.1130/g22050.1 Article history received: 12 Jul 2005 rev-recd: 26 Aug 2005 accepted: 30 Aug 2005 first online: 09 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 F. Michaud, J.Y. Royer, J. Bourgois, J. Dyment, T. Calmus, W. Bandy, M. Sosson, C. Mortera-Gutiérrez, B. Sichler, M. Rebolledo-Viera, B. Pontoise; Oceanic-ridge subduction vs. slab break off: Plate tectonic evolution along the Baja California Sur continental margin since 15 Ma . Geology 2006;; 34 (1): 13–16. doi: https://doi.org/10.1130/g22050.1 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 The interaction of the Pacific-Farallon spreading centers with the North American convergent margin off Baja California, Mexico, supposedly ceased at 12 Ma, when plate convergence and seafloor spreading stopped. We propose a new geodynamic evolution based on full bathymetry coverage and magnetic profiles from 23°N to 27°N (Famex cruise of the R/V L'Atalante, April 2002). The data unveil a major clockwise rotation of the Pacific-Farallon spreading direction, starting ca. 14 Ma, that formed a series of short spreading centers that became extinct ca. 8–7 Ma. We suggest that the transcurrent motion between the Pacific and North America along Baja California was accommodated by seafloor spreading and oblique convergence along the trench. This change in spreading direction was followed by a concomitant progressive demise of both Pacific-Farallon seafloor spreading and Farallon–North America subduction that are attributed to the break-off of the Farallon slab. This also resulted in the opening of a trench-parallel slab window beneath Baja California. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.