V11E:
Generation and Evolution of the Oceanic Lithosphere I


Session ID#: 9801

Session Description:
In this session we will explore new ideas on the magmatic and tectonic processes controlling the construction and evolution of oceanic lithosphere. Oceanic mantle and crustal rocks record a complex tectono-magmatic evolution, including multiple stages of melt extraction, mantle-melt reaction, crustal production, interaction with fluids and deformation. Deciphering the fingerprints of this evolution is fundamental to comprehend how the oceanic lithosphere is generated, modified, recycled and/or accreted at plate boundaries. We encourage contributions from a broad range of disciplines (petrology, geochemistry, geophysics, numerical modeling) that constrain the evolution of oceanic mantle and crust, in particular focusing on implications for construction and alteration of oceanic lithosphere at mid-ocean ridges, back arc basins, and subduction zones.
Primary Convener:  Claudio Marchesi, University of Granada, Departamento de Mineralogía y Petrología, Granada, Spain
Conveners:  V. Dorsey Wanless, Boise State University, Geosciences, Boise, United States, Eric L Mittelstaedt, University of Idaho, Department of Earth and Spatial Sciences, Moscow, ID, United States and Daniele Brunelli, Woods Hole Oceanographic Institution, Woods Hole, United States
Chairs:  Claudio Marchesi, University of Granada, Departamento de Mineralogía y Petrología, Granada, Spain, V. Dorsey Wanless, Boise State University, Geosciences, Boise, United States and Eric L Mittelstaedt, University of Idaho, Department of Earth and Spatial Sciences, Moscow, ID, United States
OSPA Liaison:  Claudio Marchesi, University of Granada, Departamento de Mineralogía y Petrología, Granada, Spain

Cross-Listed:
  • MR - Mineral and Rock Physics
  • S - Seismology
  • T - Tectonophysics
Co-Sponsor(s):
  • GS: Geochemical Society - Geochemical Society
  • MSA: Mineralogical Society of America - Mineralogical Society of America
Index Terms:

8140 Ophiolites [TECTONOPHYSICS]
8178 Tectonics and magmatism [TECTONOPHYSICS]
8416 Mid-oceanic ridge processes [VOLCANOLOGY]
8439 Physics and chemistry of magma bodies [VOLCANOLOGY]

Abstracts Submitted to this Session:

Metasomatic Enrichment of Oceanic Lithospheric Mantle Documented by Petit-Spot Xenoliths (58426)
Sebastien Pilet, University of Lausanne, Institute of Earth Sciences, Lausanne, Switzerland, Natsue Abe, Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Mantle Drilling Promotion Office, MarE3, Yokohama, Japan, Laetitia Rochat, University of Lausanne, Lausanne, Switzerland, Naoto Hirano, Tohoku University, Center for Northeast Asian Studies, Sendai, Japan, Shiki Machida, JAMSTEC Japan Agency for Marine-Earth Science and Technology, Kanagawa, Japan, Mary-Alix Kaczmarek, GET Géosciences Environnement Toulouse, Toulouse, France and Othmar Muntener, University of Lausanne, Institute of mineralogy and geochemistry, Lausanne, Switzerland
A Gradient in Cooling Rate Beneath the Moho at the Oman Ophiolite: Fresh Insights into Cooling Processes at Mid-Ocean Ridges from REE-Based Thermometry (Invited) (59980)
Nicholas J Dygert, University of Texas at Austin, Austin, TX, United States, Peter B Kelemen, Columbia University of New York, Palisades, NY, United States and Yan Liang, Brown University, Department of Earth, Environmental and Planetary Sciences, Providence, RI, United States
Serpentinization Changes Nd, but not Hf Isotopes of Abyssal Peridotites (71282)
Michael Bizimis, University of South Carolina, School of Earth-Ocean-Environment, Columbia, United States, Carl P Frisby, University of South Carolina, Earth and Ocean Sciences, Columbia, SC, United States and Soumen Mallick, Brown University, Earth, Environmental and Planetary Sciences, Providence, United States
Constraints on the accretion of the gabbroic lower oceanic crust from plagioclase lattice preferred orientation in the Samail ophiolite (72598)
Jill A VanTongeren, Rutgers University New Brunswick, New Brunswick, NJ, United States, Greg Hirth, Brown University, Department of Earth, Environmental, and Planetary Sciences, Providence, RI, United States and Peter B Kelemen, Columbia University of New York, Palisades, NY, United States
Occurrences of Orthopyroxene in the “Multi-textured” Layered Gabbros from the Hess Deep Rift, East Pacific Rise (the Site U1415P, IODP Expedition 345) (76646)
Takashi Hoshide, Akita University, Akita, Japan, Sumiaki Machi, Kanazawa University, Kanazawa, Japan and Jin-ichiro Maeda, Hokkaido University, Graduate School of Science, Sapporo, Japan
Crustal accretion along the global mid-ocean ridge system based on basaltic glass and olivine-hosted melt inclusion compositions (60916)
V. Dorsey Wanless, Boise State University, Geosciences, Boise, United States and Mark D Behn, Woods Hole Oceanographic Institution, Geology and Geophysics, Woods Hole, MA, United States
Sub-km HIMU-type Enriched Mantle at a Mid-ocean Ridge Far From a Plume: Endeavour, JdFR (59362)
James B Gill1, Peter J Michael2, Brian M Dreyer1, David A Clague3 and Frank C Ramos4, (1)University of California Santa Cruz, Santa Cruz, CA, United States, (2)University of Tulsa, Geosciences, Tulsa, OK, United States, (3)Monterey Bay Aquarium Research Institute, Moss Landing, CA, United States, (4)New Mexico State University Main Campus, Las Cruces, NM, United States
Geochemical constraints on the source of EPR MORBs (76839)
Liyan Tian, Institute of Deep-sea Science and Engineering, Chinese Academy of Sciences, Sanya, China and Zhengrong Wang, City college of New York, CUNY, Earth and Atmospheric Sciences, New York, NY, United States

See more of: Volcanology, Geochemistry and Petrology