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Thin crust, ultramafic exposures, and rugged faulting patterns at the Mid-Atlantic Ridge (22°–24°N)
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1995
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EngineeringFault GeologyContinental TectonicsEarth ScienceGeophysicsPlate TectonicsThin CrustRegional TectonicsEric HumlerNeotectonicsMarine GeologyGeographyGeologyMid-atlantic RidgeEngineering GeologyUltramafic ExposuresTectonicsFault GeometryStructural GeologySubduction ZoneEarth SciencesFrance Search
Research Article| January 01, 1995 Thin crust, ultramafic exposures, and rugged faulting patterns at the Mid-Atlantic Ridge (22°–24°N) Mathilde Cannat; Mathilde Cannat 1CNRS/Universite Pierre et Marie Curie, Laboratoire de Petrologie, 4 place Jussieu 75252 Paris, France Search for other works by this author on: GSW Google Scholar Catherine Mevel; Catherine Mevel 1CNRS/Universite Pierre et Marie Curie, Laboratoire de Petrologie, 4 place Jussieu 75252 Paris, France Search for other works by this author on: GSW Google Scholar Marcia Maia; Marcia Maia 2CNRS/Universite de Bretagne Occidentale, 6 avenue Le Gorgeu, 29275 Brest, France Search for other works by this author on: GSW Google Scholar Christine Deplus; Christine Deplus 3CNRS/Institut de Physique du Globe, 4 place Jussieu 75252 Paris, France Search for other works by this author on: GSW Google Scholar Cecile Durand; Cecile Durand 2CNRS/Universite de Bretagne Occidentale, 6 avenue Le Gorgeu, 29275 Brest, France Search for other works by this author on: GSW Google Scholar Pascal Gente; Pascal Gente 2CNRS/Universite de Bretagne Occidentale, 6 avenue Le Gorgeu, 29275 Brest, France Search for other works by this author on: GSW Google Scholar Pierre Agrinier; Pierre Agrinier 4Institut de Physique du Globe, 4 place Jussieu 75252 Paris, France Search for other works by this author on: GSW Google Scholar Abdel Belarouchi; Abdel Belarouchi 5Laboratoire de Petrologie, Universite d'Aix Marseille, 13397 Marseille, France Search for other works by this author on: GSW Google Scholar Gilles Dubuisson; Gilles Dubuisson 6CNRS/Ecole Normale Superieure, 24 rue Lhomond 75231 Paris, France Search for other works by this author on: GSW Google Scholar Eric Humler; Eric Humler 4Institut de Physique du Globe, 4 place Jussieu 75252 Paris, France Search for other works by this author on: GSW Google Scholar Jennifer Reynolds Jennifer Reynolds 7Lamont Doherty Earth Observatory, Palisades, New York 10964 Search for other works by this author on: GSW Google Scholar Author and Article Information Mathilde Cannat 1CNRS/Universite Pierre et Marie Curie, Laboratoire de Petrologie, 4 place Jussieu 75252 Paris, France Catherine Mevel 1CNRS/Universite Pierre et Marie Curie, Laboratoire de Petrologie, 4 place Jussieu 75252 Paris, France Marcia Maia 2CNRS/Universite de Bretagne Occidentale, 6 avenue Le Gorgeu, 29275 Brest, France Christine Deplus 3CNRS/Institut de Physique du Globe, 4 place Jussieu 75252 Paris, France Cecile Durand 2CNRS/Universite de Bretagne Occidentale, 6 avenue Le Gorgeu, 29275 Brest, France Pascal Gente 2CNRS/Universite de Bretagne Occidentale, 6 avenue Le Gorgeu, 29275 Brest, France Pierre Agrinier 4Institut de Physique du Globe, 4 place Jussieu 75252 Paris, France Abdel Belarouchi 5Laboratoire de Petrologie, Universite d'Aix Marseille, 13397 Marseille, France Gilles Dubuisson 6CNRS/Ecole Normale Superieure, 24 rue Lhomond 75231 Paris, France Eric Humler 4Institut de Physique du Globe, 4 place Jussieu 75252 Paris, France Jennifer Reynolds 7Lamont Doherty Earth Observatory, Palisades, New York 10964 Publisher: Geological Society of America First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (1995) 23 (1): 49–52. https://doi.org/10.1130/0091-7613(1995)023<0049:TCUEAR>2.3.CO;2 Article history First Online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation Mathilde Cannat, Catherine Mevel, Marcia Maia, Christine Deplus, Cecile Durand, Pascal Gente, Pierre Agrinier, Abdel Belarouchi, Gilles Dubuisson, Eric Humler, Jennifer Reynolds; Thin crust, ultramafic exposures, and rugged faulting patterns at the Mid-Atlantic Ridge (22°–24°N). Geology 1995;; 23 (1): 49–52. doi: https://doi.org/10.1130/0091-7613(1995)023<0049:TCUEAR>2.3.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 Off-axis rock sampling in the lat 22°–24° N region of the Mid-Atlantic Ridge shows that the emplacement of mantle-derived rocks in the sea floor has been a common process there for the past few million years. We find a good correlation between domains of positive residual gravity anomalies (inferred to have a thin crust) and the distribution of ultramafic samples. We also find that thin-crust domains have a rugged topography, thought to reflect strong tectonic disruption. We propose that these thin-crust domains are made of tectonically uplifted ultramafic rocks, with gabbroic intrusions and a thin basaltic cover. We also suggest that strong tectonic disruption may be a direct consequence of the lithological and rheological heterogeneity of these thin-crust domains. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.