V11D:
The Ophiolite-Subduction Connection: Using Peridotites as Analogs for Subduction Zone Mantle Posters


Session ID#: 8521

Session Description:
Supra-subduction zone ophiolites, which form in the mantle wedge of nascent subduction zones, preserve mantle lithologies that formed in response to hydrous melting. The refractory residuum of this process enhances our understanding of the geochemical flux in the mantle wedge and is critical to our understanding of the ‘subduction factory’ and resulting arc volcanism. The resulting architecture of these ophiolites demonstrates that they are petrologically and chemically distinct from igneous rocks formed at modern spreading centers in the major ocean basins. Abstracts addressing ophiolite petrogenesis with respect to subduction initiation, peridotite geochemistry, extent and nature of melt extraction, extent of fluid flux through the mantle wedge, and subsequent mantle-melt interactions are welcomed. This session aims to integrate the chemical and physical structure of the mantle wedge, address controversial origins of well-known ophiolites, and discuss the diversity in the architecture and geochemical fingerprints observed in ophiolites.
Primary Convener:  Marlon M Jean, Luh Institut Fuer Geologie, Hannover, Germany
Conveners:  John W Shervais, Utah State University, Department of Geosciences, Logan, UT, United States, Julian Anthony Pearce, Cardiff University, Cardiff, CF24, United Kingdom and Véronique Le Roux, Woods Hole Oceanographic Inst, Geology & Geophysics Department, Woods Hole, MA, United States
Chairs:  Marlon M Jean, Luh Institut Fuer Geologie, Hannover, Germany and Véronique Le Roux, Woods Hole Oceanographic Institution, Geology & Geophysics Department, Woods Hole, MA, United States
OSPA Liaison:  Marlon M Jean, Luh Institut Fuer Geologie, Hannover, Germany

Cross-Listed:
  • T - Tectonophysics
Index Terms:

1009 Geochemical modeling [GEOCHEMISTRY]
1031 Subduction zone processes [GEOCHEMISTRY]
3619 Magma genesis and partial melting [MINERALOGY AND PETROLOGY]
3621 Mantle processes [MINERALOGY AND PETROLOGY]

Abstracts Submitted to this Session:

Effect of Mantle Wedge Hybridization by Sediment Melt on Geochemistry of Arc Magma and Arc Mantle Source – Insights from Laboratory Experiments at High Pressures and Temperatures (Invited) (48385)
Ananya Mallik, Bayerisches Geoinstitut, Universitaet Bayreuth, Bayreuth, Germany, Rajdeep Dasgupta, Rice University, Department of Earth, Environmental and Planetary Sciences, Houston, TX, United States, Kyusei Tsuno, Arizona State University, Eyring Materials Center, Tempe, United States and Jared Michael Nelson, Texas A & M University, Physics and Astronomy, College Station, TX, United States
Gabbro-peridotite Interaction in the Northern Cache Creek Composite Terrane Ophiolite, British Columbia and Yukon (79878)
Alexandre Zagorevski, Geological Survey of Canada, Ottawa, ON, Canada
Source Evolution After Subduction Initiation as Recorded in the Izu-Bonin-Mariana Fore-arc Crust (Invited) (60723)
Mark K Reagan, University of Iowa, Iowa City, IA, United States, Julian A Pearce, Cardiff Univ, Cardiff, United Kingdom, Kenji Shimizu, JAMSTEC, Kochi, Japan, John W Shervais, Utah State University, Department of Geosciences, Logan, UT, United States and IODP Expedition 352 Scientific Team
SSZ Ophiolite Peridotites as Analogues for Supra-Subduction Zone Mantle (70769)
John W Shervais, Utah State University, Department of Geosciences, Logan, UT, United States and Marlon M Jean, Luh Institut Fuer Geologie, Hannover, Germany
Distribution of lithium in the Cordilleran Mantle wedge (48292)
Marlon M Jean, Luh Institut Fuer Geologie, Hannover, Germany, H.-Michael Seitz, Geozentrum der Goethe-Universität, Institut für Geowissenschaften, Facheinheit Mineralogie - Petrologie und Geochemie, Frankfurt am Main, Germany and John W Shervais, Utah State University, Department of Geosciences, Logan, UT, United States
Heterogeneous Oxidation in Supra-Subduction Settings: Evidence from Forearc Peridotites (Invited) (58549)
Suzanne Katherine Birner, Stanford University, Stanford, CA, United States, Jessica M Warren, University of Delaware, Newark, DE, United States, Elizabeth Cottrell, Smithsonian, NMNH, Department of Mineral Sciences, Washington, DC, United States and Fred A Davis, University of Minnesota Duluth, Duluth, MN, United States
Evidence of melting, melt percolation and deformation in a supra-subduction zone (Marum ophiolite complex - Papua New Guinea) (Invited) (58569)
Mary-Alix Kaczmarek, GET Géosciences Environnement Toulouse, Toulouse, France, Leo Jonda, University of Papua New Guinea, Earth Sciences Division, Port-Moresby, Papua New Guinea and Hugh L Davies, University of Papua New Guinea, Port Moresby, Papua New Guinea
Variably Depleted Peridotites from Loma Caribe (Dominican Republic): A Possible Record of Subduction Initiation beneath the Greater Antilles Paleo-Arc (78435)
Claudio Marchesi1,2, Francois Tissot2, Joaquín A Proenza3, Lidia Butjosa3 and John F Lewis4, (1)University of Granada, Departamento de Mineralogía y Petrología, Granada, Spain, (2)CSIC-UGR, Instituto Andaluz de Ciencias de la Tierra, Armilla (Granada), Spain, (3)Universitat de Barcelona, Departament de Cristal•lografia, Mineralogia i Dipòsits Minerals, Barcelona, Spain, (4)George Washington University, Dept. of Earth and Environmental Sciences, Washington, DC, United States
Mantle Wedge formation during Subduction Initiation: evidence from the refertilized base of the Oman ophiolitic mantle (78395)
Cécile Prigent, University Joseph Fourier Grenoble, Grenoble, France, Stephane Guillot, ISTerre Institute of Earth Sciences, Grenoble, France, Philippe Agard, Sorbonne Université, ISTeP Institut des Sciences de la Terre de Paris, Paris, France, Marguerite Godard, Géosciences Montpellier, CNRS, Univ. Montpellier, Montpellier, France, Damien Lemarchand, University of Strasbourg, Strasbourg Cedex, France and Marc Ulrich, University of Strasbourg, Institut Terre et Environnement de Strasbourg, Strasbourg Cedex, France

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