DI011
Mantle dynamics and seismic anisotropy: Observations, models, and experiments
Session ID#: 81434
Session Description:
Understanding mantle dynamics is a fundamental goal of solid Earth science. However, it has also posed a major challenge due to the inaccessibility of the Earth’s interior and uncertainties in observations, models, and experiments. Recent advances in measuring seismic anisotropy have generated new constraints on mantle dynamics, including subduction zone processes, lithospheric deformation, mantle circulation, and core-mantle boundary processes. Novel modeling techniques now enable the simulation of dynamic processes in the Earth’s mantle at unprecedented resolution. Finally, experimental advances are enabling new laboratory constraints on the deformation and rheology of mantle materials at relevant temperatures and pressures. As a result of these combined efforts, new perspectives are emerging on the dynamic evolution of the Earth’s mantle. We invite submissions on the deformation and structure of the mantle from seismic and MT measurements, experimental and computational constraints on deformation and rheology, and geodynamic modeling studies.
Index Terms:
3902 Creep and deformation [MINERAL PHYSICS]
7208 Mantle [SEISMOLOGY]
8120 Dynamics of lithosphere and mantle: general [TECTONOPHYSICS]
Primary Convener: Maureen D Long, Yale University, New Haven, CT, United States
Conveners: Margarete Ann Jadamec, University at Buffalo, Geology, Buffalo, NY, United States and Benjamin L Brugman, Michigan State University, East Lansing, MI, United States
Primary Liaison: Maureen D Long, Yale University, New Haven, CT, United States
Simulating the development of Lattice-Preferred Orientation and Seismic Anisotropy within an adaptive, unstructured mesh, computational modelling framework (494016)
Arjav Utpal Shah1, Christopher Mathews2, Rhodri Davies2, Caroline M Eakin3, Thomas Duvernay2, Navid Hedjazian4 and Fanny Garel5, (1)Indian Institute of Technology Bombay, Chemical Engineering, Mumbai, India, (2)Australian National University, Research School of Earth Sciences, Canberra, ACT, Australia, (3)Australian National University, Research School of Earth Sciences, Canberra, Australia, (4)Université de Lyon, Laboratoire de Géologie de Lyon Terra, Planètes, Environment, Lyon, France, (5)Université de Montpellier, Géosciences Montpellier, Montpellier Cedex 05, France
Seismic anisotropy and 3-D mantle flow in the Sumatra subduction zone: Constraints from shear wave splitting and receiver function investigations (498530)
Fansheng Kong1, Stephen S Gao2, Kelly Hong Liu2 and Jiabiao Li3, (1)Second Institute of Oceanography, State Oceanographic Administration of China, Hangzhou, China, (2)Missouri University of Science and Technology, Geology and Geophysics Program, Rolla, MO, United States, (3)Second Institute of Oceanography, Ministry of Natural Resources, China, Hangzhou, China
A post-perovskite province in D'' beneath the Eastern Pacific? New evidence from discrepant SKS-SKKS shear-wave splitting (498884)
Joseph Philip Robert Asplet1, James M Wookey2 and J Michael Kendall2, (1)University of Bristol, School of Earth Sciences, Bristol, BS8, United Kingdom, (2)University of Bristol, School of Earth Sciences, Bristol, United Kingdom
Study of the asthenospheric flow around cratonic keels from numerical modelling (502590)
Marcelo Peres Rocha, OBSIS Seismological Observatory of the University of Brasília, Brasilia, Brazil, Victor Sacek, University of São Paulo, São Paulo, SP, Brazil and Edgar Bueno dos Santos, USP University of Sao Paulo, Geophysics, São Paulo, Brazil
Crustal anisotropy as a window to mantle dynamics: A case study on the western United States (512949)
Jorge C. Castellanos1, Jonathan Perry-Houts2, Robert W Clayton1 and Eugene Humphreys3, (1)California Institute of Technology, Seismological Laboratory, Pasadena, CA, United States, (2)University of Oregon - 1299, Eugene, OR, United States, (3)Univ Oregon, Eugene, OR, United States
Deformation experiments of bridgmanite and ferropericlase; Implication for the strength of the subducted slab in the lower mantle (513135)
Shintaro Azuma1, Ryuichi Nomura2, Kentaro Uesugi3, Yu Nishihara4 and Takeshi Arimoto4, (1)Tokyo Institute of Technology, Tokyo, Japan, (2)Kyoto University, Kyoto, Japan, (3)Japan Synchrotron Radiation Research Institute, Hyogo, Japan, (4)Ehime University, Matsuyama, Japan
Slab tearing beneath western Tibet and its geodynamic implications: Insight from anisotropic tomography (514323)
Heng Zhang, ITP Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing, China, Yunyue Elita Li, National University of Singapore, Singapore, Singapore, Dapeng Zhao, Tohoku University, Sendai, Japan and Junmeng Zhao, Institute of Tibetan Plateau, Beijing, China
Shear Wave Splitting Observations in the Middle and Western Australian Cratons (515994)
Xiaoran Chen, Rutgers University New Brunswick, New Brunswick, NJ, United States, Huaiyu Yuan, Macquarie University, CCFS, Sydney, NSW, Australia and Vadim L Levin, Rutgers University, Department of Earth and Planetary Sciences, Piscataway, NJ, United States
Seismic Anisotropy and Mantle Deformation beneath the Hindu Kush-Pamir Region (516022)
Yichen Geng1, Julia MacDougall1, Jocelyn M West2 and Karen M. Fischer1, (1)Brown University, Dept. of Earth, Environmental and Planetary Sciences, Providence, RI, United States, (2)University of Colorado at Boulder, Boulder, United States
Mantle support for Middle Atlas topography: refining tomographic images by including anisotropy (518060)
Hwaju Lee, University of Minnesota Twin Cities, Earth Sciences, Minneapolis, MN, United States and Maximiliano Bezada, University of Minnesota, Earth Science, Minneapolis, MN, United States
Seismic Anisotropy in the Lowermost Mantle beneath North America from SKS-SKKS Splitting Discrepancies (548451)
Katherine Lutz1, Maureen D Long1, Neala Creasy1 and Jie Deng2, (1)Yale University, New Haven, CT, United States, (2)University of California Los Angeles, Department of Earth, Planetary, and Space Sciences, Los Angeles, CA, United States
Seismic Anisotropy Across and Along the Mid-Continent Rift (554504)
Andrew W Frederiksen1, Parth Pokar1, Edward Barrow1, Justin Revenaugh2 and Suzan Van der Lee3, (1)University of Manitoba, Geological Sciences, Winnipeg, MB, Canada, (2)Univ Minnesota, Minneapolis, MN, United States, (3)Northwestern University, Evanston, IL, United States
Slip in, and Strength of, Natural Pyropic and Majoritic Garnets at High Pressures (568195)
Cara Vennari1, Feng Lin2, Martin Kunz3, Masaki Akaogi4, Lowell M Miyagi2 and Quentin Williams1, (1)University of California Santa Cruz, Santa Cruz, CA, United States, (2)University of Utah, Salt Lake City, UT, United States, (3)Lawrence Berkeley National Lab, Berkeley, CA, United States, (4)Gakushuin Univ, Tokyo, Japan
Elasto-Visco Plastic Modeling of CaGeO3 (pv) + MgO Deformation : Applicability for Understanding the Multiphase Rheology of the Lower Mantle (580357)
Nadege Hilairet, CNRS / Université de Lille, UMET, Villeneuve D'Ascq, France, Julien Gasc, Ecole Normale Supérieure Paris, Laboratoire de Géologie, Paris, France, Carlos Tomé, Los Alamos National Laboratory, Mat Sci & Technol Div, Los Alamos, NM, United States, Huamiao Wang, McMaster University, Department of Mechanical Engineering,, Hamilton, ON, Canada, Feng Shi, The University of Chicago, Center for Advanced Radiation Sources, Argonne, IL, United States, Yanbin Wang, The University of Chicago, Center for Advanced Radiation Sources, Chicago, IL, United States and Sebastien Merkel, Université de Lille, Villeneuve d'Ascq, France
Slab-driven Asthenospheric Weakening Facilitating Tectonic Plate Motion (633553)
Margarete Ann Jadamec, University at Buffalo, Buffalo, NY, United States, Simin Gao, University of Houston, Earth and Atmospheric Sciences, Houston, United States, Julia MacDougall, University of Houston, Department of Earth and Atmospheric Sciences, Houston, TX, United States and Karen M. Fischer, Brown University, Dept. of Earth, Environmental and Planetary Sciences, Providence, RI, United States
