Modes of seafloor generation at a melt-poor ultraslow-spreading ridge

Abstract

Research Article| July 01, 2006 Modes of seafloor generation at a melt-poor ultraslow-spreading ridge Mathilde Cannat; Mathilde Cannat 1Equipe de Géosciences Marines, CNRS-UMR 7154, Institut de Physique du Globe, 4 place Jussieu, 75252 Paris cedex 05, France Search for other works by this author on: GSW Google Scholar Daniel Sauter; Daniel Sauter 2Institut de Physique du Globe, 5 rue Descartes, 67084 Strasbourg cedex, France Search for other works by this author on: GSW Google Scholar Véronique Mendel; Véronique Mendel 2Institut de Physique du Globe, 5 rue Descartes, 67084 Strasbourg cedex, France Search for other works by this author on: GSW Google Scholar Etienne Ruellan; Etienne Ruellan 3Géosciences Azur, CNRS-UMR 6526, 250 rue A. Einstein, Sophia Antipolis, 06560 Valbonne, France Search for other works by this author on: GSW Google Scholar Kyoko Okino; Kyoko Okino 4Ocean Research Institute, University of Tokyo, 1-15-1 Minamidai, Nakano, Tokyo 164-8639, Japan Search for other works by this author on: GSW Google Scholar Javier Escartin; Javier Escartin 5Equipe de Géosciences Marines, CNRS-UMR 7154, Institut de Physique du Globe, 4 place Jussieu, 75252 Paris cedex 05, France Search for other works by this author on: GSW Google Scholar Violaine Combier; Violaine Combier 5Equipe de Géosciences Marines, CNRS-UMR 7154, Institut de Physique du Globe, 4 place Jussieu, 75252 Paris cedex 05, France Search for other works by this author on: GSW Google Scholar Mohamad Baala Mohamad Baala 6Institut de Physique du Globe, 5 rue Descartes, 67084 Strasbourg cedex, France Search for other works by this author on: GSW Google Scholar Author and Article Information Mathilde Cannat 1Equipe de Géosciences Marines, CNRS-UMR 7154, Institut de Physique du Globe, 4 place Jussieu, 75252 Paris cedex 05, France Daniel Sauter 2Institut de Physique du Globe, 5 rue Descartes, 67084 Strasbourg cedex, France Véronique Mendel 2Institut de Physique du Globe, 5 rue Descartes, 67084 Strasbourg cedex, France Etienne Ruellan 3Géosciences Azur, CNRS-UMR 6526, 250 rue A. Einstein, Sophia Antipolis, 06560 Valbonne, France Kyoko Okino 4Ocean Research Institute, University of Tokyo, 1-15-1 Minamidai, Nakano, Tokyo 164-8639, Japan Javier Escartin 5Equipe de Géosciences Marines, CNRS-UMR 7154, Institut de Physique du Globe, 4 place Jussieu, 75252 Paris cedex 05, France Violaine Combier 5Equipe de Géosciences Marines, CNRS-UMR 7154, Institut de Physique du Globe, 4 place Jussieu, 75252 Paris cedex 05, France Mohamad Baala 6Institut de Physique du Globe, 5 rue Descartes, 67084 Strasbourg cedex, France Publisher: Geological Society of America Received: 21 Dec 2005 Revision Received: 22 Feb 2006 Accepted: 01 Mar 2006 First Online: 09 Mar 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 The Geological Society of America, Inc. Geology (2006) 34 (7): 605–608. https://doi.org/10.1130/G22486.1 Article history Received: 21 Dec 2005 Revision Received: 22 Feb 2006 Accepted: 01 Mar 2006 First Online: 09 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation Mathilde Cannat, Daniel Sauter, Véronique Mendel, Etienne Ruellan, Kyoko Okino, Javier Escartin, Violaine Combier, Mohamad Baala; Modes of seafloor generation at a melt-poor ultraslow-spreading ridge. Geology 2006;; 34 (7): 605–608. doi: https://doi.org/10.1130/G22486.1 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 We report on extensive off-axis bathymetry, gravity, and magnetic data that provide a 26-m.y.-long record of axial tectonic and magmatic processes over a 660-km-long and melt-poor portion of the ultraslow Southwest Indian Ridge. We describe a new type of seafloor (the smooth seafloor) that forms at minimal ridge melt supply, with little or no axial volcanism. We propose possible mechanisms leading to this avolcanic or nearly avolcanic mode of spreading, in contradiction with the traditional view of mid-ocean ridges as primarily volcanic systems. We also show evidence for large-offset asymmetric normal faults and detachments at the ridge axis, with asymmetry persisting in some cases for tens of millions of years. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.