DI44A:
Multiscale Heterogeneity in Earths Deep Interior: Constraints from Imaging, Modeling, and Experiments II

Submit an Abstract to this Session



Session ID#: 32049

Session Description:
Recent progress in seismology, geodynamics, geochemistry, and mineral physics provides insight into heterogeneity across spatial scales. Imaging techniques now model the full spectrum of seismic data, ranging from broadband seismic waveforms and normal modes, to arrival times of body and surface waves. These advancements provide constraints on parameters like attenuation, anisotropy, and density, illuminating the thermochemical nature of convective features. Regional techniques reveal small-scale features including potential remnants of subducted slabs and ultra-low velocity zones. The emerging consensus on large-scale mantle heterogeneity has led to cross-disciplinary efforts towards developing reference Earth models and data sets. The detected heterogeneity implies variation in intrinsic properties like temperature, composition, grain size, or crystal structure. Disaggregating these effects through observations, experiments, and modeling is vital for explaining the geological origins of seismic heterogeneities and for understanding mantle mixing processes. We invite submissions that explore the nature of heterogeneities at local, regional, and global scales.
Primary Convener:  Pritwiraj Moulik, University of Maryland College Park, Department of Geology, College Park, MD, United States
Conveners:  Gregory J Finkelstein, California Institute of Technology, Pasadena, CA, United States, Creasy Neala, Colorado School of Mines, Golden, United States and Lauren Waszek, New Mexico State University, Las Cruces, United States
Chairs:  Lauren Waszek, New Mexico State University, Las Cruces, United States and Pritwiraj Moulik, University of Maryland College Park, Department of Geology, College Park, MD, United States
OSPA Liaison:  Gregory J Finkelstein, California Institute of Technology, Pasadena, CA, United States

Cross-Listed:
  • MR - Mineral and Rock Physics
  • S - Seismology
  • T - Tectonophysics
  • V - Volcanology, Geochemistry and Petrology
Index Terms:

7208 Mantle [SEISMOLOGY]
7270 Tomography [SEISMOLOGY]
8033 Rheology: mantle [STRUCTURAL GEOLOGY]
8124 Earth's interior: composition and state [TECTONOPHYSICS]

Abstracts Submitted to this Session:

Heterogeneous distribution of water in the mantle transition zone beneath United States inferred from seismic observations (254098)
Yinzhi Wang, Indiana University Bloomington, Bloomington, United States, Gary L Pavlis, Indiana University Bloomington, Earth and Atmospheric Sciences, Bloomington, IN, United States and Mingming Li, Arizona State University, School of Earth and Space Exploration, Tempe, United States
Origin of the Lower-Mantle Heterogeneities - Importance of the Crystal Chemistry of Bridgmanite (Invited) (222798)
Sang-Heon Dan Shim1, Brent Grocholski2, Yu Ye3,4, Ercan E. Alp5, Yue Meng6, Vitali B Prakapenka7, Dane Morgan8 and Shenzhen Xu8, (1)Arizona State University, School of Earth and Space Exploration, Tempe, AZ, United States, (2)American Association for the Advancement of Science Arlington, Arlington, VA, United States, (3)Arizona State University, Tempe, AZ, United States, (4)China University of Geosciences Wuhan, Wuhan, China, (5)Argonne National Laboratory, Advanced Photon Source, Argonne, United States, (6)Carnegie Institution of Washington, HPCAT, Argonne, IL, United States, (7)The University of Chicago, Center for Advanced Radiation Sources, Chicago, United States, (8)Univ of Wisconsin- Madison, Madison, WI, United States
Core-exsolved SiO2 Dispersal in the Earth's Mantle (267631)
George R Helffrich, Tokyo Institute of Technology, Earth-Life Science Institute, Tokyo, Japan, Maxim Ballmer, University College London, ETH Zürich, London, United Kingdom and Kei Hirose, Earth-Life Science Institute, Meguro, Japan
Update on the Search for Chemical Interactions Between the Core and Mantle (217816)
Richard J Walker, University of Maryland College Park, Department of Geology, College Park, MD, United States
An Equation Governing Ultralow-Velocity Zones: Implications for Holes in the ULVZ, Lateral Chemical Reactions at the Core-Mantle Boundary, and Damping of Heat Flux Variations in the Core (Invited) (266944)
John W Hernlund, Earth-Life Science Institute, Meguro, Tokyo, Japan and Hiroaki Matsui, University of California Davis, Davis, CA, United States
The importance of grain size to mantle dynamics and seismological observations (232618)
Rene Gassmoeller, Colorado State University, Mathematics, Fort Collins, CO, United States, Juliane Dannberg, Colorado State University, Fort Collins, CO, United States, Zachary Eilon, University of California Santa Barbara, Earth Science, Santa Barbara, CA, United States, Ulrich Faul, Massachusetts Institute of Technology, Earth Atmospheric and Planetary Sciences, Cambridge, MA, United States, Pritwiraj Moulik, University of Maryland College Park, Department of Geology, College Park, MD, United States and Robert Myhill, University of Bristol, School of Earth Sciences, Bristol, United Kingdom
Global Adjoint Tomography -- Hotspots and Slabs (260415)
Youyi Ruan1, Wenjie Lei1, Matthieu Philippe Lefebvre1, Ryan T Modrak1, James A Smith2, Ridvan Orsvuran3, Ebru Bozdag4 and Jeroen Tromp5, (1)Princeton University, Princeton, NJ, United States, (2)Princeton University, Civil and Environmental Engineering, Princeton, United States, (3)Colorado School of Mines, Geophysics, Golden, CO, United States, (4)Colorado School of Mines, Department of Applied Mathematics & Statistics and Department of Geophysics, Golden, CO, United States, (5)Princeton University, Department of Geosciences, Princeton, NJ, United States
The 3D Reference Earth Model: Status and Preliminary Results (291711)
Vedran Lekic, University of Maryland, College Park, MD, United States, Pritwiraj Moulik, University of Maryland College Park, Department of Geology, College Park, MD, United States and Barbara A Romanowicz, Institut de Physique du Globe de Paris, Collège de France, Paris, France; Berkeley Seismological Laboratory, University of California Berkeley, Berkeley, United States

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