DI31A:
Multiscale Heterogeneity in Earths Deep Interior: Constraints from Imaging, Modeling, and Experiments I Posters

Submit an Abstract to this Session



Session ID#: 26365

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:

Investigating Ultra-low Velocity Zones beneath the Southwestern Pacific (206538)
Sarah Elizabeth Carson, University of Alabama, Tuscaloosa, AL, United States, Samantha Elizabeth Hansen, The University of Alabama, Geological Sciences, Tuscaloosa, United States and Edward Garnero, Arizona State University, School of Earth and Space Exploration, Tempe, AZ, United States
Finite-frequency effects on estimates of the S-wave and P-wave velocity structure in D” (211640)
Jeroen Ritsema, University of Michigan Ann Arbor, Department of Earth and Environmental Sciences, Ann Arbor, United States, Carlos A. M. Chaves, University of Michigan Ann Arbor, Ann Arbor, MI, United States and Paula Koelemeijer, University College London, Department of Earth Sciences, London, United Kingdom
3-D S-velocity structure in the lowermost mantle beneath the Northern Pacific (268606)
Yuki Suzuki1, Kenji Kawai2, Robert J Geller3, Anselme F E Borgeaud3 and Kensuke Konishi4, (1)The University of Tokyo, School of Science, Department of Earth and Planetary Science, Tokyo, Japan, (2)The University of Tokyo, Department of Earth and Planetary Science, Tokyo, Japan, (3)University of Tokyo, Bunkyo-ku, Japan, (4)Academia Sinica, Taipei, Taiwan
Detection of a Sharp Structural Boundary in Lowermost Mantle Beneath Alaska by Core Phase PKPbc-df Differential Travel Times - Observation from the Anomalous South Sandwich Islands to Alaska Path (267743)
Hitoshi Kawakatsu, LONG Xin and Nozomu Takeuchi, Earthquake Research Institute, The University of Tokyo, Tokyo, Japan
Seismic Evidence for Lower Mantle Plume Under the Yellowstone Hotspot (261050)
Peter Nelson, University of Texas at Austin, Austin, TX, United States and Steve Grand, University of Texas at Austin, Department of Geological Sciences, Austin, United States
Confirmation of a change in the global shear velocity pattern at around 1,000 km depth (224164)
Eric Debayle, Univ Lyon, Univ Lyon 1, ENSL, CNRS, LGL-TPE, Villeurbanne, France, Stephanie Durand, Univ Lyon, Univ Lyon 1, ENSL, CNRS, LGL-TPE, Villeurbanne Cedex, France; University of Münster, Münster, Germany, Yanick R Ricard, ENS de Lyon, Universite de Lyon, CNRS, Universite Lyon 1, LGL, Lyon, France, Christophe Zaroli, Université de Strasbourg, EOST/CNRS, Institut Terre et Environnement de Strasbourg, UMR 7063, Strasbourg Cedex, France and Sophie Lambotte, Institut de Physique du Globe Strasbourg, CNRS, Strasbourg Cedex, France
Transdimensional Bayesian tomography of the lowermost mantle from shear waves (269318)
Claire Richardson, University of Nebraska Lincoln, Lincoln, NE, United States, syede Sima Mousavi, University of Leipzig, Leipzig, Germany, Hrvoje Tkalčić, Australian National University, Research School of Earth Sciences, Canberra, ACT, Australia and Guy Masters, UCSD Scripps Inst Oceanography, La Jolla, CA, United States
Probabilistic estimation of splitting coefficients of normal modes of the Earth, and their uncertainties, using an autoregressive technique (277277)
Surya Pachhai, UCSD Scripps Institution of Oceanography, La Jolla, CA, United States, Guy Masters, UCSD Scripps Inst Oceanography, La Jolla, CA, United States and Gabi Laske, Scripps Institution of Oceanography, La Jolla, United States
Intra-LLSVP Heterogeneity from Spherical Slepian Analysis (276855)
Tolulope M Olugboji, University of Maryland College Park, College Park, MD, United States, Pritwiraj Moulik, Columbia University of New York, New York, NY, United States, Alain Plattner, California State University Fresno, Fresno, CA, United States and Vedran Lekic, University of Maryland, Department of Geology, College Park, United States
REM-3D Reference Datasets: Reconciling large and diverse compilations of travel-time observations (280294)
Pritwiraj Moulik, University of Maryland College Park, Department of Geology, College Park, MD, United States, Vedran Lekic, University of Maryland, Department of Geology, College Park, United States and Barbara A Romanowicz, Berkeley Seismological Laboratory, University of California Berkeley, Berkeley, United States
Probing Mantle Heterogeneity Across Spatial Scales (280372)
Anant Hariharan, Cornell University, Earth and Atmospheric Sciences, Ithaca, NY, United States, Pritwiraj Moulik, Columbia University of New York, New York, NY, United States and Vedran Lekic, University of Maryland, Department of Geology, College Park, United States
Mantle viscosity structure constrained by joint inversions of seismic velocities and density (279232)
Maxwell L Rudolph, University of California Davis, Department of Earth and Planetary Sciences, Davis, CA, United States, Pritwiraj Moulik, University of Maryland College Park, Department of Geology, College Park, MD, United States and Vedran Lekic, University of Maryland, College Park, MD, United States
Interpreting the GyPSuM Tomography Model in Terms of Thermal Heterogeneity and Major Oxide Composition (288332)
Paul M Bremner, University of Florida, Department of Geological Sciences, Ft Walton Beach, FL, United States, Alessandro M Forte, Institut de Physique du Globe de Paris, Géomagnétisme, Paris, France, Nathan A Simmons, Lawrence Livermore Nat'l Lab, Atmospheric, Earth and Energy Division, Livermore, CA, United States and Steve Grand, University of Texas at Austin, Department of Geological Sciences, Austin, United States
Seismic observation of a sharp post-garnet phase transition within the Farallon crust: Evidence for oceanic plateau subduction (257137)
Ross Maguire, University of Michigan Ann Arbor, Department of Earth and Environmental Sciences, Ann Arbor, MI, United States and Jeroen Ritsema, Univ Michigan, Ann Arbor, MI, United States
Upper-mantle tectonic compartmentalization beneath Amazonian Craton from P-wave seismic tomography (216840)
Marcelo Peres Rocha, OBSIS Seismological Observatory of the University of Brasília, Brasilia, Brazil and Paulo Araujo de Azevedo, Federal University of Western Pará, Santarém, Brazil
Mountain Building in Central and Western Tien Shan Orogen: Insight from Joint Inversion of Surface Wave Phase Velocities and Body Wave Travel Times (237891)
Shucheng Wu, Yingjie Yang and Kai Wang, ARC Centre of Excellence for Core to Crust Fluid Systems and GEMOC, Macquarie University, Sydney, Australia
Topography Estimation of the Core Mantle Boundary with ScS Reverberations and Diffraction Waves (258032)
Bailey E Hein, University of Oklahoma Norman Campus, Norman, OK, United States and Nori Nakata, Lawrence Berkeley National Laboratory, Earth and Environmental Sciences Area, Berkeley, United States

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