DI009
Mantle Phase Transitions and their Impact on Convection, Evolution, and Interior Structure
Session ID#: 248826
Session Description:
Mineral phase transitions in the mantle impact the dynamics, evolution, and structure of planetary interiors. These transitions—governed by variations in pressure, temperature, and composition—can influence large-scale mantle convection, promote thermal and chemical stratification, and produce seismic discontinuities. However, understanding the dynamic impacts of mineral transitions remains challenging due to uncertainties in phase boundaries, the role of water and volatiles, variations in mineral assemblages, and their effects on physical properties such as rheology and thermal conductivity. This session invites contributions from experimental and computational mineral physics, geodynamics, seismology, and related disciplines to examine how phase transitions influence processes such as plume dynamics, slab stagnation, core–mantle interactions, and the development of large mantle structures.
Co-Sponsor(s):
Index Terms:
1025 Composition of the mantle [GEOCHEMISTRY]
1038 Mantle processes [GEOCHEMISTRY]
3924 High-pressure behavior [MINERAL PHYSICS]
7208 Mantle [SEISMOLOGY]
Primary Convener: Allison M Pease, Arizona State University, School of Earth and Space Exploration, Tempe, United States; Michigan State University, Department of Earth and Environmental Sciences, East Lansing, MI, United States
Conveners: Lars P Stixrude, University of California Los Angeles, Department of Earth, Planetary and Space Sciences, Los Angeles, CA, United States and Arushi Saxena, University of California Davis, Earth and Planetary Sciences, Davis, CA, United States
Student/Early Career Convener: Heidi Krauss, Michigan State University, Department of Earth and Environmental Science, East Lansing, MI, United States
Constraints on Lowermost Mantle Dynamics From a Massive Seismic Dataset (Invited) (1849085)
Jonathan Wolf1, Barbara A Romanowicz2, Edward Garnero3, Mingming Li4, Weiqiang Zhu5 and John D West4, (1)University of California Berkeley, Berkeley, CA, United States, (2)Univ California Berkeley, Earth and Planetary Science, Berkeley, United States, (3)Arizona State University, School of Earth and Space Exploration, Tempe, AZ, United States, (4)Arizona State University, Tempe, United States, (5)University of California, Berkeley, Department of Earth and Planetary Science, Berkeley, United States
Elasticity of Fe,Al,Mg,Ti-bearing Davemaoite Explains Lower Mantle Seismic Heterogeneities (Invited) (1883896)
Jin Zhang1, Wen-Yi Zhou2, Ming Hao2, Wenhao Su3, Taehyun Kim4, Sibo Chen5, Sang-Heon Dan Shim6, Phuong Nguyen7, Dongzhou Zhang8 and Katherine Armstrong9, (1)Texas A&M University College Station, Geology & Geophysics, College Station, TX, United States, (2)University of New Mexico, Earth & Planetary Sciences, Albuquerque, United States, (3)Texas A&M University College Station, Department of Geology and Geophysics, College Station, United States, (4)Arizona State University, School of Earth and Space Exploration, Tempe, AZ, United States, (5)Stony Brook University, Stony Brook, United States, (6)Arizona State University, School of Earth and Space Exploration, Tempe, United States, (7)University of Hawaii at Manoa, Hawaii Institute of Geophysics and Planetology, Honolulu, United States, (8)Caltech-Seismolab, Pasadena, United States, (9)Lawrence Berkeley National Lab, Berkeley, United States
Deformation of high-pressure hydrous phases and their contribution to seismic anisotropy in the Earth’s mantle (1939463)
Amartya Kattemalavadi, University of California Berkeley, Department of Earth and Planetary Science, Berkeley, United States, Katherine Armstrong, Lawrence Berkeley National Lab, Berkeley, United States; University of California Santa Cruz, Santa Cruz, United States, Heidi Krauss, Michigan State University, Department of Earth and Environmental Science, East Lansing, MI, United States, Allen K McNamara, Michigan State University, Earth and Environmental Sciences, East Lansing, MI, United States, Barbara A Romanowicz, Univ California Berkeley, Earth and Planetary Science, Berkeley, United States; Berkeley Seismological Laboratory, UC Berkeley, Berkeley, United States, Carlos Tome, Los Alamos National Laboratory, Materials Science and Technology Division, Los Alamos, United States and Hans-Rudolf Wenk, Univ California Berkeley, Berkeley, CA, United States
Compressibility and Chemical Bonding in Al,Fe-bearing Phase H [MgSiO2(OH)2] (1979782)
Elizabeth Colette Thompson, Sewanee The University of the South, Sewanee, TN, United States, Brian Gulick, The University of the South, Dept. of Earth and Environmental Systems, Sewanee, United States, Steeve Gréaux, Geodynamics Research Center, Ehime University, Matsuyama, Japan and Zhenxian Liu, University of Illinois Chicago, Department of Physics, Chicago, United States
