DI011
Multidisciplinary Views of the Core-Mantle Boundary Region
Session ID#: 251322
Session Description:
The core-mantle boundary (CMB) region marks the bottom thermal boundary layer and the transition between the solid silicate mantle and the liquid iron outer core. The region influences and holds imprints of key dynamic processes including plume generation, slab foundering, and mantle convection, holding clues to the planet’s thermochemical evolution. It also hosts a variety of anomalous structures across a range of spatial scales. Yet, despite its global significance, it remains poorly understood due to its inaccessibility and complex physical properties. We invite multidisciplinary studies of the broader CMB region, including seismic imaging of ultra-low velocity zones and D″ structures, experimental and theoretical mineral physics under extreme conditions, high-resolution geodynamic modeling, and geochemical isotope insights.
Co-Sponsor(s):
Index Terms:
3909 Elasticity and anelasticity [MINERAL PHYSICS]
7208 Mantle [SEISMOLOGY]
8124 Earth's interior: composition and state [TECTONOPHYSICS]
8125 Evolution of the Earth [TECTONOPHYSICS]
Primary Convener: Vedran Lekic, University of Maryland College Park, Department of Geology, College Park, United States
Conveners: Val Finlayson, University of Maryland College Park, Department of Geology, College Park, MD, United States, Vasilije V Dobrosavljevic, Carnegie Science, Earth & Planets Laboratory, Washington, D.C., United States and Doyeon Kim, Imperial College London, Department of Earth Science and Engineering, London, United Kingdom
Helium isotopes in mantle-derived magmas controlled by partial melting (1867935)
Andrea Giuliani, Carnegie Science, Earth & Planets Laboratory, Washington, DC, United States, Senan Oesch, ETH Zurich, Institute of Geochemistry and Petrology, Zurich, Switzerland, Federico Daniel Munch, Institute of Geophysics, ETH Zurich, Zurich, Switzerland, Ronghua Cai, China University of Geoscience Beijing, State Key Laboratory of Geological Processes and Mineral Resources, Beijing, China, Jingao Liu Prof, China University of Geosciences Beijing, Beijing, China, Mark D Kurz, WHOI, Department of Marine Chemistry & Geochemistry, Woods Hole, United States, Peter H Barry, WHOI, Woods Hole, United States, Luc S Doucet, Curtin University, Perth, Australia and Michael J Walter, Carnegie Institution for Science, Earth and Planets Laboratory, Washington, United States
Understanding Lower Mantle and Outer Core Structure- The Longer Way! (1900067)
Autumn Muhly, University of South Carolina School of the Earth, Ocean & Environment, Columbia, SC, UNITED STATES, Daniel Andrew Frost, University of South Carolina, School of Earth, Ocean, and Environment, Columbia, United States, Edward Garnero, Arizona State University, School of Earth and Space Exploration, Tempe, AZ, United States and John D West, Arizona State University, Tempe, United States
Thermal conductivities of Earth’s lowermost mantle and uppermost core (1935034)
Wen-Pin Hsieh1, Frederic Deschamps1, Yi-Ting Chiang2, Yi-Chi Tsao3, Susannah Dorfman4, Daijo Ikuta5 and Eiji Ohtani6, (1)Institute of Earth Sciences Academia Sinica, Taipei, Taiwan, (2)National Taiwan University, Department of Geosciences, Taipei, Taiwan, (3)Academia Sinica, Taipei, Taiwan, (4)Michigan State University, Department of Earth and Environmental Sciences, East Lansing, MI, United States, (5)Okayama University, Institute for Planetary Materials, Misasa, Japan, (6)Tohoku Univ, Sendai, Japan
Mantle solidification inevitably leads to a basal magma ocean on top of the core (1951053)
James Badro1, Henri Samuel1 and Charles-Édouard Boukaré1,2, (1)Université Paris Cité, Institut de Physique du Globe de Paris, CNRS, Paris, France, (2)York University, Department of Physics and Astronomy, Toronto, Canada
On the Viscosity of the Deep Mantle (1974564)
Alina Valop, Virginia Polytechnic Institute and State University, Blacksburg, United States and Scott D. King, Virginia Polytechnic Institute and State University, Blacksburg, VA, United States
Thermoelectricity at Earth's core-mantle boundary (1979452)
Francis Dragulet, University of California Los Angeles, Department of Earth, Planetary, and Space Sciences, Los Angeles, United States and Lars P Stixrude, University of California Los Angeles, Department of Earth, Planetary and Space Sciences, Los Angeles, CA, United States
Effects of Water on the Post-perovskite Transition (1983918)
Taehyun Kim1, Yongjae Lee2, Stella Chariton3, Vitali Prakapenka3, Eran Greenberg4 and Sang-Heon Dan Shim1, (1)Arizona State University, School of Earth and Space Exploration, Tempe, AZ, United States, (2)Yonsei University, Department of Earth System Sciences, Seoul, South Korea, (3)The University of Chicago, Center for Advanced Radiation Sources, Chicago, United States, (4)University of Chicago, Center for Advanced Radiation Sources, Lemont, IL, United States
Energetically Expensive Dynamo Action in Earth's Basal Magma Ocean (1991741)
Jonathan M Aurnou, University of California Los Angeles, Earth, Planetary, and Space Sciences, Los Angeles, CA, United States, Nathanaël Schaeffer, ISTerre, Université Grenoble Alpes, CNRS, Grenoble, France and Stephane Labrosse, Ecole Normale Supérieure Lyon, Lyon, France
