DI24A:
Petrological and Thermal Structure of the Mantle from the Transition Zone to the CMB: Causes and Consequences of Phase Transitions I


Submit an Abstract to this Session


Session ID#: 60354

Session Description:
In the last few decades seismic observations have revealed the structure of the mantle in ever increasing richness. Mineral physics experiments and theory have been uncovering new phase transitions, characterizing changes in the valence and spin state of iron, and determining element partitioning behavior in mantle phases. Concurrently, advances in seismology and geodynamic modelling have been building a consistent picture of Earth in which mantle structures can be identified and their importance to mantle dynamics can be understood. We now have evidence of seismic structure that is consistent with thermodynamically controlled processes, thermal variations due to mantle convection and petrological variations possibly due to partial melting, primordial reservoirs, mantle segregation and recycling. We seek contributions in experimental, theoretical and observational fields, including seismology, petrology, mineral physics, geochemistry and geodynamics, which investigate the nature and role of phase transitions in the structure and dynamics of Earth's interior.
Primary Convener:  Natalia V Solomatova, CNRS, École Normale Supérieure de Lyon, Lyon, France
Conveners:  Chris J Grose, California Institute of Technology, Division of Geological and Planetary Sciences, Pasadena, CA, United States, Songqiao Shawn Wei, Michigan State University, Department of Earth and Environmental Sciences, East Lansing, MI, United States and Carolina R Lithgow-Bertelloni, University of California Los Angeles, Department of Earth, Planetary, and Space Sciences, Los Angeles, CA, United States
Primary Liaison:  Natalia V Solomatova, CNRS, École Normale Supérieure de Lyon, Lyon, France
Chairs:  Natalia V Solomatova, Caltech, Arcadia, United States and Songqiao Shawn Wei, Michigan State University, Department of Earth and Environmental Sciences, East Lansing, MI, United States
OSPA Liaison:  Songqiao Shawn Wei, Michigan State University, Department of Earth and Environmental Sciences, East Lansing, MI, United States

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

3621 Mantle processes [MINERALOGY AND PETROLOGY]
3924 High-pressure behavior [MINERAL PHYSICS]
7208 Mantle [SEISMOLOGY]
8124 Earth's interior: composition and state [TECTONOPHYSICS]

Abstracts Submitted to this Session:

Long-term Subduction Modulates Localized Compositional Stratification near the 660-km Seismic Discontinuity (386907)
Kai Deng1,2 and Teh-Ru Alex Song1, (1)University College London, Department of Earth Sciences, London, United Kingdom, (2)Chengdu University of Technology, Chengdu, China
Velocity structure of the 660-km Discontinuity Beneath the Southeastern China (425192)
Meng Zhang1, Daoyuan Sun1, Yi Wang1 and Zhongqing Wu2, (1)University of Science and Technology of China, Hefei, China, (2)University of Science and Technology of China, Laboratory of Seismology and Physics of Earth’s Interior, School of Earth and Space Sciences, Hefei, China
Double Diffusive Convection – Creating Boundary Layers within the Earth's Mantle (431333)
Ulrich Hansen, University of Münster, Institute for Geophysics, Münster, Germany and Sabine Dude, University of Münster, Münster, Germany
The Evolution and Distribution of Chemical Heterogeneity in the Earth’s Mantle (424344)
Jun Yan, ETH Zurich, Institute of Geophysics, Zurich, Switzerland, Maxim Ballmer, University College London, ETH Zürich, London, United Kingdom and Paul J Tackley, ETH Zurich, Department of Earth and Planetary Sciences, Zurich, Switzerland
Speciation of Fe and Al in bridgmanite as a function of composition and oxygen fugacity (368965)
Rong Huang1, Tiziana Boffa Ballaran2, Catherine A McCammon2, Nobuyoshi Miyajima2 and Daniel J Frost2, (1)Bayerisches Geoinstitut, University of Bayreuth, Bayreuth, Germany, (2)University of Bayreuth, Bayerisches Geoinstitut, Bayreuth, Germany
Thermal conductivity of ferropericlase along the mantle geotherm (430844)
Chris P McGuire1, Krista Lynn Sierra Sawchuk2, Emma Rainey3 and Abby Kavner3, (1)University of Edinburgh, School of GeoSciences, Edinburgh, United Kingdom, (2)University of California Los Angeles, Earth, Planetary, and Space Sciences, Los Angeles, CA, United States, (3)University of California Los Angeles, Los Angeles, United States
Lower Mantle Minerals Under Compression: Implication for Origin of the D” Discontinuity (355308)
Zhu Mao1, Ningyu Sun1, Wei Wei1, Xinyang Li1, Yunfei Duan1 and Vitali B Prakapenka2, (1)University of Science and Technology of China, Hefei, China, (2)The University of Chicago, Center for Advanced Radiation Sources, Chicago, United States
Pressure, temperature and composition dependence of the oxygen-vacancy components in bridgmanite under mid-mantle conditions: implications to mantle viscosity variation and volatile transport (382753)
Tomoo Katsura1, Zhaodong Liu2, Biao Wang2, Hongzhan Fei3, Takayuki Ishii2, Rong Huang2, Lin Wang2, Artem Chanyshev2, Catherine A McCammon2, Leonid S Dubrovinsky2, Daniel J Frost2 and Tiziana Boffa Ballaran2, (1)University Bayreuth, Bayerisches Geoinstitut, Bayreuth, Germany, (2)University of Bayreuth, Bayerisches Geoinstitut, Bayreuth, Germany, (3)Zhejiang University, School of Earth Sciences, Hangzhou, China

See more of: Study of Earth's Deep Interior