[E] Oral

S (Solid Earth Sciences ) » S-IT Science of the Earth's Interior & Techtonophysics

[S-IT18] Planetary cores: Structure, formation, and evolution

Thu. Jun 3, 2021 9:00 AM - 10:30 AM Ch.24 (Zoom Room 24)

convener:Hidenori Terasaki(Faculty of Science, Okayama University), Eiji Ohtani(Department of Earth and Planetary Materials Science, Graduate School of Science, Tohoku University), F William McDonough(Department of Earth Science and Research Center for Neutrino Science, Tohoku University, Sendai, Miyagi 980-8578, Japan), Attilio Rivoldini(Royal Observatory of Belgium), Chairperson:Hidenori Terasaki(Faculty of Science, Okayama University), Attilio Rivoldini(Royal Observatory of Belgium)

There are fundamental links between the formation and evolution of planets and their satellites to that of their cores both in terms of magnetic field generation and chemical and physical structure. Defining physical and chemical properties of the cores and core materials of these terrestrial bodies are therefore fundamental for understanding their internal structures and thermal profile. Recent advances in experimental and theoretical studies provide new insights into the Earth's cores and other terrestrial bodies, including the role of light elements in the early history of planets and at current times. Recent, current and future space missions have and will continue to obtain data on the internal structure of terrestrial planets (e.g., Mars and Mercury) and planet-satellite systems. We anticipate presentations on recent advances on the physical and chemical properties of cores and discussions regarding the latest views of their formation and evolution. We welcome contributions from mineral/rock physics, geophysics, geochemistry, geodynamics, and planetary science. We also welcome papers stimulating an interdisciplinary collaboration relating to establishment of the Study of Earth Deep Interior (SEDI)-Japan community.

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9:00 AM - 9:05 AM

[SIT18-01] Introduction

9:05 AM - 9:20 AM

[SIT18-02] New compositional insight on the formation of the Earth's core

*William F McDonough^1,2,3, Takashi Yoshizaki¹ (1.Department of Earth Science, Graduate School of Science, Tohoku University, Sendai, Miyagi 980-8578, Japan, 2.Research Center for Neutrino Science, Tohoku Uni- versity, Sendai, Miyagi 980-8578, Japan, 3.Department of Geology, University of Maryland, College Park, MD 20742, USA)

9:20 AM - 9:35 AM

[SIT18-03] Interstitial site occupancy of deuterium in a Fe-Si binary system at high-pressure and high-temperature conditions using a large volume press

*Yuichiro Mori¹, Hiroyuki Kagi¹, Sho Kakizawa², Chikara Shito¹, Riko Iizuka-Oku¹, Katsutoshi Aoki¹, Takanori Hattori³, Asami Sano-Furukawa³, Ken-ichi Funakoshi⁴, Hirouyki Saitoh⁵ (1.The University of Tokyo, 2.Hiroshima Univ., 3.J-PARC Center, JAEA., 4.Neutron Science and Technology Center, CROSS. , 5.QST.)

9:35 AM - 9:50 AM

[SIT18-04] Effects of nickel on hydrogenation of iron: High-PT neutron diffraction measurements on Fe0.9Ni0.1Dx

Chikara Shito¹, *Hiroyuki Kagi¹, Sho Kakizawa², Katsutoshi Aoki¹, Riko Iizuka¹, Yuichiro Mori¹, Kazuki Komatsu¹, Hiroyuki Saitoh³, Jun Abe⁴, Asami Sano-Furukawa⁵, Takanori Hattori⁵ (1.Geochemical Research Center, Graduate School of Science, University of Tokyo, 2.Graduate School of Advanced Science and Engineering, Hiroshima University, 3.National Institutes for Quantum and Radiological Science and Technology, 4.Comprehensive Research Organization for Science and Society, 5.Japan Atomic Energy Agency)

9:50 AM - 10:05 AM

[SIT18-05] Melting Experiments on the Fe-C-O Ternary System Under Core Pressures

*Fumiya Sakai¹, Kei Hirose^1,2 (1.Department of Earth and Planetary Science, The University of Tokyo, 2.Earth-Life Science Institute, Tokyo Institute of Technology)

10:05 AM - 10:20 AM

[SIT18-06] Existence of the two-phase mixture of HCP and B2 phases in the inner core

*Eiji Ohtani¹, Daijo Ikuta¹, Serena Dominijanni², Catherine McCammon², Naohisa Hirao³, Hiroshi Fukui⁴, Hiroshi Uchiyama³, Alfred Q. R. Baron⁴ (1.Department of Earth and Planetary Materials Science, Graduate School of Science, Tohoku University, 2.Bayerisches Geoinstitut, University of Bayreuth, 3.Japan Synchrotron Radiation Research Institute, 4.RIKEN)

10:20 AM - 10:30 AM

Session information