DI21B:
Slabs in Earth's Mantle: Where Do They Go and How Do They Interact with the Mantle? II


Session ID#: 8134

Session Description:
Subduction of oceanic lithosphere has recycled vast amounts of material between the Earth’s mantle, crust, and atmosphere over geologic time. Styles of subduction vary widely across the Earth, with potential consequences for various modes and fluxes of geochemical cycling. New views on what controls slab dynamics are leading to better understanding, for example, under what conditions slabs reach the core-mantle boundary or instead stagnate in the transition zone or shallow lower mantle. Fluxes and the depth to which slabs carry volatiles, especially carbon and hydrogen, will depend on subduction style, pressure-temperature phase stability, and melt generation. In this session we hope to communicate ideas across SEDI research such as imaging of slab geometry and seismicity, geodynamic modelling of slab dynamics, and mineral physics and geochemical experiments or computations collectively aimed at understanding the physics and chemistry of slabs in the Earth’s mantle.
Primary Convener:  Hauke Marquardt, Bayerisches Geoinstitut, Universitaet Bayreuth, Bayreuth, Germany
Conveners:  Steven D Jacobsen, Northwestern University, Department of Earth and Planetary Sciences, Evanston, United States, Maureen D Long, Yale University, Department of Earth & Planetary Sciences, New Haven, United States and Margarete Ann Jadamec, University of Houston, Dept. of Earth and Atmospheric Sciences, Houston, TX, United States
Chairs:  Hauke Marquardt, Bayerisches Geoinstitut, Universitaet Bayreuth, Bayreuth, Germany, Maureen D Long, Yale University, Department of Earth & Planetary Sciences, New Haven, United States and Margarete Ann Jadamec, University of Houston, Dept. of Earth and Atmospheric Sciences, Houston, TX, United States
OSPA Liaison:  Steven D Jacobsen, Northwestern University, Department of Earth and Planetary Sciences, Evanston, United States
Co-Organized with:
Study of Earth's Deep Interior, Mineral and Rock Physics, Seismology, and Tectonophysics

Cross-Listed:
  • MR - Mineral and Rock Physics
  • S - Seismology
  • T - Tectonophysics
Co-Sponsor(s):
  • EGU-GD: European Geosciences Union - Division on Geodynamics -
Index Terms:

1030 Geochemical cycles [GEOCHEMISTRY]
3999 General or miscellaneous [MINERAL PHYSICS]
7208 Mantle [SEISMOLOGY]
8120 Dynamics of lithosphere and mantle: general [TECTONOPHYSICS]

Abstracts Submitted to this Session:

Continuous eclogite melting and variable refertilisation in upwelling heterogeneous mantle (Invited) (78002)
Anja Rosenthal1,2, Gregory Mark Yaxley2, David H Green2,3, Daniel J Frost4, Istvan Kovacs2,5, Carl Spandler6 and Joerg Hermann2,7, (1)Bayerisches Geoinstitut, Universitaet Bayreuth, Bayreuth, Germany, (2)Australian National University, Research School of Earth Sciences, Canberra, Australia, (3)University of Tasmania, School of Earth Sciences and Centre for Ore Deposit Studies, Hobart, TAS, Australia, (4)Bayerisches Geoinstitut, Universität Bayreuth, Bayreuth, Germany, (5)Geological and Geophysical Institute of Hungary, Laboratory Department, Budapest, Hungary, (6)James Cook University, School of Earth and Environmental Sciences, Townsville, Australia, (7)University of Bern, Institute of Geological Sciences, Bern, Switzerland
Toward a comprehensive understanding of transition zone seismic discontinuities: A new constraint near the stagnant slab region beneath China (Invited) (83373)
Teh-Ru Alex Song, University College London, Department of Earth Sciences, London, United Kingdom, Xuzhang Shen, Sun Yat-sen University, School of Earth Sciences and Engineering, Guangdong Provincial Key Laboratory of Geodynamics and Geohazards, Zhuhai, China, Lars P Stixrude, University College London, Earth Sciences, London, United Kingdom and Carolina R Lithgow-Bertelloni, University of California Los Angeles, Department of Earth, Planetary, and Space Sciences, Los Angeles, CA, United States
Large-scale depressions on the 660 seismic discontinuity beneath Europe: signature of the role of akimotoite in subducting slabs (72433)
Sanne Cottaar, University of Cambridge, Cambridge, United Kingdom and Arwen Fedora Deuss, Utrecht University, Utrecht, Netherlands
Slab Stagnation and Buckling in the Mantle Transition Zone: Petrology, Rheology, and the Geodynamics of Trench Migration (Invited) (76665)
Craig R. Bina, Northwestern University, Department of Earth and Planetary Sciences, Evanston, United States and Hana Čížková, Charles University Prague, Faculty of Mathematics and Physics, Department of Geophysics, Praha, Czech Republic
Deformation of the Tonga Slab: Evidence for Interaction with a Small-scale Secondary Plume in the Transition Zone (Invited) (73954)
Magali I Billen, University of California Davis, Department of Earth and Planetary Sciences, Davis, CA, United States, John Z Bikoba, University of California Davis, Davis, CA, United States and Scott Tarlow, University of California Davis, Earth and Planetary Sciences, Davis, CA, United States
Breakdown of phase D by formation of aluminous bridgmanite (72522)
Tomoo Katsura1, Takayuki Ishii2, Nobuyoshi Miyajima3, Sylvain Petitgirard3 and Catherine A McCammon4, (1)Universität Bayreuth, Bayerisches Geoinstitut, Bayreuth, Germany, (2)University of Bayreuth, Bayerisches Geoinstitut, Bayreuth, Germany, (3)Bayerisches Geoinstitut, Universitaet Bayreuth, Bayreuth, Germany, (4)University of Bayreuth, Bayreuth, Germany
Mid-Mantle Interaction Between the Big, Active Samoan Plume and the Tonga-Kermadec Slabs (61283)
Sung-Joon Chang, Kangwon National University, Chuncheon, Korea, Republic of (South), Ana MG Ferreira, University College London, Dept. of Earth Sciences, London, United Kingdom; University College of London, Department of Earth Sciences, London, United Kingdom and Manuele Faccenda, University of Padova, Padova, Italy
An ancient slab visible from the transition zone to the deep mantle beneath the southern Indian Ocean (70634)
Nathan A Simmons1, Steve Myers2, Gardar Johannesson3, Eric Matzel3 and Steve Grand4, (1)Lawrence Livermore National Laboratory, Atmospheric, Earth and Energy Division, Livermore, CA, United States, (2)Lawrence Livermore National Laboratory, Livermore, United States, (3)Lawrence Livermore National Laboratory, Livermore, CA, United States, (4)University of Texas at Austin, Department of Geological Sciences, Austin, United States

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