T53B:
Structure and Dynamics of the Upper Mantle: Characterizing the Lithosphere–Asthenosphere System from Crust to Transition Zone II


Submit an Abstract to this Session


Session ID#: 57054

Session Description:
The lithosphere-asthenosphere system accommodates the motions of the lithospheric plates with respect to the underlying mantle. It is characterized by some of the largest gradients in physical properties found in the Earth’s deep interior. These strong contrasts in properties often do not arise from static structures or a single dominant process but rather evolve from the complex interplay between geodynamic processes and tectonic forces. In this session we welcome research contributions that explore the structure and dynamics of lithospheric and asthenospheric upper mantle across a range of tectonic settings (oceans, continents, rifts, margins, etc) and length scales (local to regional, continental, and global-scales) utilizing techniques and datasets from diverse fields, including but not limited to, seismology, electromagnetics, gravity, geodesy, geodynamic modeling, petrology/mineralogy, and mineral physics.
Primary Convener:  Claire A Currie, University of Alberta, Department of Physics, Edmonton, AB, Canada
Conveners:  Vedran Lekic, University of Maryland, Department of Geology, College Park, United States, Jolante van Wijk, New Mexico Institute of Mining and Technology, Earth & Environmental Science, Socorro, United States and Andrew J Schaeffer, University of Ottawa, Department of Earth and Environmental Sciences, Ottawa, ON, Canada
Primary Liaison:  Andrew J Schaeffer, University of Ottawa, Department of Earth and Environmental Sciences, Ottawa, ON, Canada
Chairs:  Claire A Currie, University of Alberta, Department of Physics, Edmonton, AB, Canada and Andrew J Schaeffer, Dublin Institute for Advanced Studies, Dublin, Ireland
OSPA Liaison:  Andrew J Schaeffer, Dublin Institute for Advanced Studies, Dublin, Ireland
Co-Organized with:
Tectonophysics, and Seismology

Cross-Listed:
  • DI - Study of the Earth's Deep Interior
  • MR - Mineral and Rock Physics
  • S - Seismology
  • V - Volcanology, Geochemistry and Petrology

Proposed Co-Organized Session with:
  • DI - Study of Earth's Deep Interior
  • S - Seismology
Index Terms:

7208 Mantle [SEISMOLOGY]
8120 Dynamics of lithosphere and mantle: general [TECTONOPHYSICS]
8125 Evolution of the Earth [TECTONOPHYSICS]
8159 Rheology: crust and lithosphere [TECTONOPHYSICS]

Abstracts Submitted to this Session:

Resolving Thick Thermal Lithosphere beneath the Southeastern United States: The Importance of Anelasticity in Synthesizing Seemingly Contradictory MT and Seismic Results (448158)
Benjamin S Murphy, Oregon State University, College of Earth, Ocean, and Atmospheric Sciences, Corvallis, United States and Gary D Egbert, Oregon State Univ, Corvallis, OR, United States
Enhanced lithospheric mantle thinning in the melt-poor Malawi Rift (Invited) (392851)
Emily Hopper1, James B Gaherty2, Donna J Shillington3, Natalie J Accardo4, Andrew Nyblade5, Cynthia J Ebinger6, Christopher A Scholz7, Patrick Rafiki N Chindandali3, Richard Ferdinand-Wambura8, Gabriel D. Mulibo9 and Gabriel John Mbogoni10, (1)Lamont -Doherty Earth Observatory, Palisades, NY, United States, (2)Columbia University in the City of New York, Lamont-Doherty Earth Observatory, Palisades, United States, (3)Northern Arizona University, School of Earth and Sustainability, Flagstaff, AZ, United States, (4)Pennsylvania State University, Department of Geosciences, University Park, PA, United States, (5)Pennsylvania State University Main Campus, Department of Geosciences, University Park, PA, United States, (6)Tulane University, School of Science & Engineering, New Orleans, United States, (7)Syracuse University, Department of Earth and Environmental Sciences, Syracuse, United States, (8)University of Dar es Salaam, Dar es Salaam, Tanzania, (9)University of Dar es Salaam, Department of Geology, Dar es Salaam, Tanzania, (10)Geological Survey of Tanzania, Dodoma, Tanzania
Seismological Evidence for an Asthenospheric Connection between La Réunion Plume and the Central Indian Ridge (362323)
Guilhem Barruol1,2, Karin Sigloch3, John-Robert Scholz4, Alessandro Mazzullo5, Eleonore Stutzmann6, Jean-Paul Montagner5, Fabrice R. Fontaine7, Laurent Michon7, Christine Deplus8 and Jerome Dyment5, (1)Institut de Physique du Globe de Paris, Sorbonne Paris Cité, CNRS (UMR 7154), 1 rue Jussieu, 75238 Paris Cedex 05, France, Paris, France, (2)Université de Paris, Institut de Physique du Globe de Paris, Paris, France, (3)University of Oxford, Department of Earth Sciences, Oxford, United Kingdom, (4)Max Planck Institute for Solar System Research, Goettingen, Germany, (5)CNRS, Institut de Physique du Globe de Paris, Paris, France, (6)Institut de Physique du Globe de Paris (IPGP), Université Paris Cité, Paris, France, (7)Université de La Réunion, Laboratoire Géosciences Réunion-IPGP, Saint Denis, Reunion, (8)CNRS, Institut de Physique du Globe de Paris, Sorbonne Paris Cité, Université Paris Diderot, Paris, France
The Effect of Partial Melting on Seismic Wave Propagation in the La Réunion Mantle Plume. (429583)
Thijs Franken, Institut de Physique du Globe de Paris, Paris, France, John J Armitage, Royal Holloway, University of London, Paris, France, Nobuaki Fuji, Université de Paris, Institut de physique du globe de Paris, Paris, France and Alexandre Fournier, Université de Paris, Institut de Physique du Globe de Paris, CNRS, Paris, France
The lithosphere structure of the North China Craton: based on seismic, thermal and gravity data (427489)
Bing Xia, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, China, Irina M M Artemieva, University of Copenhagen, København K, Denmark and Hans Thybo, Chinese Academy of Geological Sciences, Chinese Academy of Geological Sciences, Beijing, China

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