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<publisher>HAL CCSD</publisher>
<title lang=en>Drilling constraints on lithospheric accretion and evolution at Atlantis Massif, Mid-Atlantic Ridge 30 degrees N</title>
<creator>Blackman, D. K.</creator>
<creator>Ildefonse, Benoit</creator>
<creator>John, B. E.</creator>
<creator>Ohara, Y.</creator>
<creator>Miller, D. J.</creator>
<creator>Abe, N.</creator>
<creator>Abratis, M.</creator>
<creator>Andal, E. S.</creator>
<creator>Andreani, Muriel</creator>
<creator>Awaji, S.</creator>
<creator>Beard, J. S.</creator>
<creator>Brunelli, D.</creator>
<creator>Charney, A. B.</creator>
<creator>Christie, D. M.</creator>
<creator>Collins, J.</creator>
<creator>Delacour, A. G.</creator>
<creator>Delius, H.</creator>
<creator>Drouin, Marion</creator>
<creator>Einaudi, F.</creator>
<creator>Escartin, J.</creator>
<creator>Frost, B. R.</creator>
<creator>Frueh-Green, G.</creator>
<creator>Fryer, P. B.</creator>
<creator>Gee, J. S.</creator>
<creator>Godard, Marguerite</creator>
<creator>Grimes, C. B.</creator>
<creator>Halfpenny, A.</creator>
<creator>Hansen, H. -E.</creator>
<creator>Harris, A. C.</creator>
<contributor>University of California [San Diego] (UC San Diego)</contributor>
<contributor>Manteau et Interfaces ; Géosciences Montpellier ; Université des Antilles et de la Guyane (UAG) - Institut national des sciences de l'Univers (INSU - CNRS) - Université de Montpellier (UM) - Centre National de la Recherche Scientifique (CNRS) - Université des Antilles et de la Guyane (UAG) - Institut national des sciences de l'Univers (INSU - CNRS) - Université de Montpellier (UM) - Centre National de la Recherche Scientifique (CNRS)</contributor>
<contributor>University of Wyoming (UW)</contributor>
<contributor>Atmosphere and Ocean Research Institute [Kashiwa-shi] (AORI) ; The University of Tokyo</contributor>
<contributor>Texas A&M University [College Station]</contributor>
<contributor>Japan Agency for Marine-Earth Science and Technology (JAMSTEC)</contributor>
<contributor>Friedrich Schiller Universität [Jena, Germany]</contributor>
<contributor>Philex Mining Corporation</contributor>
<contributor>Géosciences Montpellier ; Université des Antilles et de la Guyane (UAG) - Institut national des sciences de l'Univers (INSU - CNRS) - Université de Montpellier (UM) - Centre National de la Recherche Scientifique (CNRS)</contributor>
<contributor>Laboratoire de Géologie de Lyon - Terre, Planètes, Environnement [Lyon] (LGL-TPE) ; Centre National de la Recherche Scientifique (CNRS) - Institut national des sciences de l'Univers (INSU - CNRS) - Université Claude Bernard Lyon 1 (UCBL) - École normale supérieure - Lyon (ENS Lyon)</contributor>
<contributor>The University of Tokyo</contributor>
<contributor>Virginia Museum of Natural History [Martinsville] ; Smithsonian Institution</contributor>
<contributor>Universita Modena, Modena</contributor>
<contributor>Oregon State University (OSU)</contributor>
<contributor>University of Alaska Fairbanks (UAF)</contributor>
<contributor>Woods Hole Oceanographic Institution (WHOI)</contributor>
<contributor>Laboratoire de Dynamique Terrestre et Planétaire ; Université Paul Sabatier - Toulouse 3 (UPS) - Observatoire Midi-Pyrénées (OMP)</contributor>
<contributor>University of Leicester</contributor>
<contributor>Institut de Physique du Globe de Paris (IPGP) ; Université Pierre et Marie Curie - Paris 6 (UPMC) - Institut national des sciences de l'Univers (INSU - CNRS) - IPG PARIS - Université Paris Diderot - Paris 7 (UPD7) - Université de la Réunion (UR) - Centre National de la Recherche Scientifique (CNRS)</contributor>
<contributor>Eidgenössische Technische Hochschule [Zürich] (ETH Zürich)</contributor>
<contributor>University of Hawaii at Manoa (UHM)</contributor>
<contributor>Australian National University (ANU)</contributor>
<contributor>University of Bergen (UIB)</contributor>
<contributor>Norwich University, Northfield, Vermont</contributor>
<description>International audience</description>
<source>ISSN: 0148-0227</source>
<source>EISSN: 2156-2202</source>
<source>Journal of Geophysical Research</source>
<publisher>American Geophysical Union</publisher>
<identifier>hal-00617528</identifier>
<identifier>https://hal.archives-ouvertes.fr/hal-00617528</identifier>
<identifier>https://hal.archives-ouvertes.fr/hal-00617528/document</identifier>
<identifier>https://hal.archives-ouvertes.fr/hal-00617528/file/2010JB007931.pdf</identifier>
<source>https://hal.archives-ouvertes.fr/hal-00617528</source>
<source>Journal of Geophysical Research, American Geophysical Union, 2011, 116, pp.B07103. 〈10.1029/2010JB007931〉</source>
<identifier>DOI : 10.1029/2010JB007931</identifier>
<relation>info:eu-repo/semantics/altIdentifier/doi/10.1029/2010JB007931</relation>
<language>en</language>
<subject lang=en>Atlantis Massif</subject>
<subject lang=en>Integrated Ocean Drilling Program</subject>
<subject lang=en>Oceanic Core Complex</subject>
<subject>[SDU.STU.OC] Sciences of the Universe [physics]/Earth Sciences/Oceanography</subject>
<type>info:eu-repo/semantics/article</type>
<type>Journal articles</type>
<description lang=en>Expeditions 304 and 305 of the Integrated Ocean Drilling Program cored and logged a 1.4 km section of the domal core of Atlantis Massif. Postdrilling research results summarized here constrain the structure and lithology of the Central Dome of this oceanic core complex. The dominantly gabbroic sequence recovered contrasts with predrilling predictions; application of the ground truth in subsequent geophysical processing has produced self-consistent models for the Central Dome. The presence of many thin interfingered petrologic units indicates that the intrusions forming the domal core were emplaced over a minimum of 100-220 kyr, and not as a single magma pulse. Isotopic and mineralogical alteration is intense in the upper 100 m but decreases in intensity with depth. Below 800 m, alteration is restricted to narrow zones surrounding faults, veins, igneous contacts, and to an interval of locally intense serpentinization in olivine-rich troctolite. Hydration of the lithosphere occurred over the complete range of temperature conditions from granulite to zeolite facies, but was predominantly in the amphibolite and greenschist range. Deformation of the sequence was remarkably localized, despite paleomagnetic indications that the dome has undergone at least 45 degrees rotation, presumably during unroofing via detachment faulting. Both the deformation pattern and the lithology contrast with what is known from seafloor studies on the adjacent Southern Ridge of the massif. There, the detachment capping the domal core deformed a 100 m thick zone and serpentinized peridotite comprises similar to 70% of recovered samples. We develop a working model of the evolution of Atlantis Massif over the past 2 Myr, outlining several stages that could explain the observed similarities and differences between the Central Dome and the Southern Ridge.</description>
<date>2011</date>
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