MR24A:
Phase Relations, Petrology, and Dynamics of the Deep Earth I

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Session ID#: 15974

Session Description:
Most mineralogical transformations are the origin of discontinuities in the Earth’s interior, and influence geochemical cycles while offering our most direct clues to the thermal and chemical state of the deep Earth. This session focuses on the transformations of minerals and assemblages of minerals under the realistic thermochemical and thermodynamical conditions of the deep Earth, the detectability of such transformations through geophysical processes, and dynamical implications. Solid-solid transitions leave a fingerprint on seismic velocities and geodynamic measurements, while melting and fluid release have a remote fingerprint on geochemical fractionation. Elemental and isotopic exchanges happen during both types of transitions. We bring together mineral physicists, petrologists, and dynamicists to address phase relationships of rocks and minerals, including their features from the telluric to the atomic scale. We encourage contributions from geochemists, seismologists and geodynamicists who consider the effect of the mineral phase transitions.
Primary Convener:  Razvan Caracas, CNRS Lyon, Lyon, France
Conveners:  Wendy R Panero, Ohio State University Main Campus, School of Earth Sciences, Columbus, OH, United States and Eiji Ohtani, Tohoku University, Sendai, Japan
Chairs:  Eiji Ohtani, Tohoku University, Sendai, Japan, Wendy R Panero, Ohio State University Main Campus, School of Earth Sciences, Columbus, OH, United States and Razvan Caracas, CNRS Lyon, Lyon, France
OSPA Liaison:  Razvan Caracas, CNRS Lyon, Lyon, France

Cross-Listed:
  • DI - Study of the Earth's Deep Interior
  • S - Seismology
  • V - Volcanology, Geochemistry and Petrology
Index Terms:

1025 Composition of the mantle [GEOCHEMISTRY]
1038 Mantle processes [GEOCHEMISTRY]
3630 Experimental mineralogy and petrology [MINERALOGY AND PETROLOGY]
3924 High-pressure behavior [MINERAL PHYSICS]

Abstracts Submitted to this Session:

High-pressure γ-CaMgSi2O6: Is penta-coordinated silicon common in the Earth mantle? (142174)
Yi Hu, University of Hawaii at Manoa, Honolulu, HI, United States, Boris Kiefer, New Mexico State University Main Campus, Department of Physics, Las Cruces, NM, United States and Przemyslaw Dera, University of Hawai'i at Mānoa, Hawai'i Institute of Geophysics and Planetology, Honolulu, United States
Quenchable water-rich, aluminous post-stishovite: implications for seismic anomalies in the mid-mantle (Invited) (123216)
Robert Myhill1, Daniel J Frost2, Wendy R Panero3, Tiziana Boffa Ballaran2, Nobuyoshi Miyajima4, Helene Bureau5, Caroline Raepsaet6, Nicki Siersch4 and Simon C Kohn1, (1)University of Bristol, School of Earth Sciences, Bristol, United Kingdom, (2)University of Bayreuth, Bayerisches Geoinstitut, Bayreuth, Germany, (3)Ohio State University Main Campus, School of Earth Sciences, Columbus, OH, United States, (4)Bayerisches Geoinstitut, Universitaet Bayreuth, Bayreuth, Germany, (5)Sorbonne Université - MNHN - CNRS - IMPMC, Paris, France, (6)CEA Commissariat à l'Energie Atomique Saclay, Gif-Sur-Yvette Cedex, France
The role of thermodynamics in mantle convection: is mantle-layering intermittent? (172480)
Neil Cagney, University College London, London, United Kingdom, Carolina R Lithgow-Bertelloni, University of California Los Angeles, Department of Earth, Planetary, and Space Sciences, Los Angeles, CA, United States and Lars P Stixrude, University College London, Earth Sciences, London, United Kingdom
Aluminum in MgSiO3 enstatite and implications for the depth and lateral variability of the X-discontinuity (Invited) (121929)
Carmen Sanchez-Valle, University of Münster, Institute for Mineralogy, Münster, Germany, Jingyun Wang, University Science & Technology of China, Hefei, China and Roland Stalder, University of Innsbruck, Institute of Mineralogy and Petrography, Innsbruck, Austria
Kinetics Of Bridgmanite To Post-Perovskite Transition in (Mg0.85,Fe0.15)SiO3 (126354)
Sebastien Merkel, Univ. Lille, Lille, France, Christopher Langrand, UMET Unité Matériaux et Transformations, Villeneuve d'Ascq, France, Nadege Hilairet, CNRS, Paris Cedex 16, France, Zuzana Konopkova, DESY Deutsches Elektronen Synchrotron, Hamburg, Germany and Denis Andrault, University Blaise Pascal Clermont-Ferrand II, Clermont-Ferrand, France
Radiative conductivity and abundance of post-perovskite in D’’ (133464)
Alexander F Goncharov, Carnegie Institution for Science, Earth and Planets Laboratory, Washington, United States, Sergey Lobanov, GL Carnegie Institution of Washington, Washington, DC, United States, Nicholas Holtgrewe, Howard University, Washington, DC, United States and Jung-Fu Lin, University of Texas at Austin, Department of Geological Sciences, Jackson School of Geosciences, Austin, TX, United States
Experimental investigation of Fe3+- rich majoritic garnet and improvement of the majorite geobarometer (124048)
Renbiao Tao1, Yingwei Fei1, Emma Bullock2, Cheng Xu3 and Lifei Zhang3, (1)Carnegie Institution for Science, Geophysical Laboratory, Washington, DC, United States, (2)Carnegie Institution for Science, Earth and Planets Laboratory, Washington, United States, (3)Peking University, School of Earth and Space Science, Beijing, China
High-temperature phase transitions in CaCO3: In situ X-ray diffraction study at pressures to 30 GPa (156229)
Konstantin Litasov, Pavel N Gavryushkin, Anton Shatskiy and Naira Martirosyan, V.S. Sobolev Institute of Geology and Mineralogy SB RAS, Novosibirsk, Russia

See more of: Mineral and Rock Physics