DI41D:
G, LAB, and MLDs: What Are They Anyway? Lithospheric Boundary Structures within and beneath the Oceans and Continents I

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Session ID#: 16720

Session Description:
Recent advances in seismic imaging suggest that that the internal structure of the rigid outer layer of the Earth, the lithosphere, appears to have appears more complex than a single boundary layer.  Seismology, numerical modeling, mineral, and rock physics, each provide clues about the origins of these structures.

Just what can we discern from the G, LAB and MLDs?  Is it significant that they occur around the same depths within the ocean and continental lithosphere?  Or is that just a coincidence? 

The session seeks submissions from a variety of disciplines to help define and clarify both global and regional lithospheric boundary structures inferred from observations, models, and experiments.  Multidisciplinary approaches that help better understand the structure and evolution of the plates are encouraged.

Primary Convener:  Meghan Samanth Miller, University of Southern California, Department of Earth Sciences, Los Angeles, CA, United States
Conveners:  Catherine M Cooper, Washington State University, School of the Environment, Pullman, United States, Philip A Skemer, Washington University in St Louis, St. Louis, MO, United States and Caroline Beghein, University of California Los Angeles, Earth, Space, and Planetary Sciences, Los Angeles, CA, United States
Chairs:  Meghan Samanth Miller, University of Southern California, Department of Earth Sciences, Los Angeles, CA, United States and Philip A Skemer, Washington University in St Louis, St. Louis, MO, United States
OSPA Liaison:  Philip A Skemer, Washington University in St Louis, St. Louis, MO, United States

Cross-Listed:
  • S - Seismology
  • T - Tectonophysics
Index Terms:

1025 Composition of the mantle [GEOCHEMISTRY]
7218 Lithosphere [SEISMOLOGY]
8103 Continental cratons [TECTONOPHYSICS]
8124 Earth's interior: composition and state [TECTONOPHYSICS]

Abstracts Submitted to this Session:

The ‘Seismic LAB’: A test for the grain boundary-sliding model (Invited) (124426)
Tolulope M Olugboji, University of Maryland College Park, College Park, MD, United States; University of Rochester, Earth and Environmental Sciences, Rochester, NY, United States, Jeffrey J Park, Yale University, Earth & Planetary Sciences, New Haven, CT, United States and Shun-ichiro Karato, Yale University, Earth and Planetary Sciences, New Haven, CT, United States
Anisotropic Lithospheric layering in the North American craton, revealed by Bayesian inversion of short and long period data (128994)
Corinna Roy, University of Leeds, School of Earth and Environment, Leeds, LS2, United Kingdom, Marco Calo, National Autonomous University of Mexico, Ciudad DE Armería, Mexico, Thomas Bodin, LGL-TPE, Université Claude Bernard, Lyon1, CNRS, ENS, Villeurbanne, France and Barbara A Romanowicz, University of California Berkeley, Department of Earth and Planetary Science, Berkeley, United States
Observing and modeling frequency-dependence in Sp receiver functions: Implications for the continental lithosphere (159371)
Nicholas J Mancinelli, Brown University, Dept. of Earth, Environmental and Planetary Sciences, Providence, RI, United States and Karen M Fischer, Brown University, Department of Earth, Environmental and Planetary Sciences, Providence, United States
Building and Modification of the Continental Lithosphere: the History of the Contiguous U.S. as told by MLDs and LABs (Invited) (165965)
Emily Hopper, Brown University, Dept. of Earth, Environmental and Planetary Sciences, Providence, RI, United States and Karen M Fischer, Brown University, Department of Earth, Environmental and Planetary Sciences, Providence, United States
Experimental Constraints on Silicic Slab Melt and Depleted Mantle Reaction in the Presence of CO2-H2O: Implications for the Origin of Mid Lithospheric Discontinuity (176087)
Sriparna Saha, Rice University, Department of Earth, Environmental and Planetary Sciences, Houston, TX, United States, Rajdeep Dasgupta, Rice University, Department of Earth, Environmental and Planetary Sciences, Houston, United States and Kyusei Tsuno, Arizona State University, Eyring Materials Center, Tempe, AZ, United States
Constraints on the radially anisotropic component of seismic discontinuities at 60-100 km depth (188568)
Nicholas Harmon, University of Southampton, Ocean and Earth Science, Southampton, United Kingdom, Catherine Rychert, Woods Hole Oceanographic Institution, Ocean and Earth Science, Woods Hole, MA, United States and Thorsten W Becker, University of Texas at Austin, Jackson School of Geosciences, Austin, TX, United States
Imaging lithospheric seismic discontinuities beneath Cascadia using S-to-P receiver functions (189197)
Catherine Rychert, Woods Hole Oceanographic Institution, Ocean and Earth Science, Woods Hole, MA, United States, Nicholas Harmon, University of Southampton, Ocean and Earth Science, Southampton, United Kingdom and Saikiran Tharimena, University of Southampton, Southampton, United Kingdom
Tradeoffs between Temperature and Melt on the Seismic Expression of the Lithosphere-Asthenosphere Boundary (196289)
Benjamin K Holtzman, Lamont-Doherty Earth Observatory, Palisades, NY, United States and Christopher Havlin, Brown University, Providence, United States

See more of: Study of Earth's Deep Interior