[E] Oral

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

[S-IT25] Planetary cores: Structure, formation, and evolution

Thu. May 30, 2019 9:00 AM - 10:30 AM A09 (TOKYO BAY MAKUHARI HALL)

convener:Hidenori Terasaki(Graduate School of Science, Osaka University), Eiji Ohtani(Department of Earth and Planetary Materials Science, Graduate School of Science, Tohoku University), William F McDonough(University of Maryland College Park), George Helffrich(Earth-Life Science Institute, Tokyo Institute of Technology), Chairperson:George Helffrich(ELSI, Tokyo Institute of Technology), Hidenori Terasaki

There are fundamental links between the formation and evolution of planets and their satellites to that of their cores. Defining the physical and chemical properties of the cores of these terrestrial bodies are fundamental for understanding their internal structures and thermal profile. Recent advances in experimental and theoretical studies provide new insights and applications to the Earth's cores and other terrestrial bodies. Near-future exploration missions will 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.

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9:00 AM - 9:15 AM

[SIT25-01] High-pressure Equation of State of Schreibersite Fe_2.15Ni_0.85P: Implications for the Martian Core

*Xuejing He¹, Jiazeng Guo², Xiang Wu³, Shengxuan Huang¹, Fei Qin¹, Xiangping Gu⁴, Shan Qin¹ (1.Peking Univ., 2.Nanyang Normal Univ., 3.China Univ. of Geosciences, 4.Central South Univ.)

9:15 AM - 9:30 AM

[SIT25-02] Bottom-up solidification versus top-down solidification of the liquid core of the relatively small planetary bodies

*Satoru Urakawa¹, Hidenori Terasaki² (1.Department of Earth Sciences, Okayama University, 2.Department of Earth and Space Science, Osaka University)

9:30 AM - 9:45 AM

[SIT25-03] P-wave velocity of Fe₃S under high pressure and temperature

*Seiji Kamada^1,2, Hidenori Terasaki³, Hiroshi Fukui^4,5, Tatsuya Sakamaki², Hiroshi Uchiyama⁶, Satoshi Tsutsui⁶, Eiji Ohtani², Alfred Q.R. Baron⁵ (1.Frontier Research Institute for Interdisciplinary Sciences, Tohoku University, 2.Department of Earth Science, Graduate School of Science, Tohoku University, 3.Department of Earth and Space Science, Graduate School of Science, Osaka University, 4.Graduate School of Material Science, University of Hyogo, 5.RIKEN, 6.JASRI)

9:45 AM - 10:00 AM

[SIT25-04] The sound velocity of liquid Fe-Ni-S-Si alloys under Mercury’s core condition

*Iori Yamada¹, Hidenori Terasaki¹, Asaka Kamiya¹, Ryo Tsuruoka¹, Yuji Higo², Akihiko Machida³ (1.Graduate School of Science, Osaka University, 2.Japan Synchrotron Radiation Research Institute, 3.National Institute for Quantum and Radiological Science and Technology)

10:00 AM - 10:15 AM

[SIT25-05] In situ observation of Rayleigh–Taylor instability growth of liquid Fe-Si using laser shock

*Hidenori Terasaki¹, Tatsuhiro Sakaiya¹, Keisuke Shigemori², Hiroki Kato², Yoichiro Hironaka², Tadashi Kondo¹ (1.Graduate School of Science, Osaka University, 2.Institute of Laser Engineering, Osaka University)

Discussion (10:15 AM - 10:30 AM)

Session information

[S-IT25] Planetary cores: Structure, formation, and evolution

[SIT25-01] High-pressure Equation of State of Schreibersite Fe_2.15Ni_0.85P: Implications for the Martian Core

[SIT25-02] Bottom-up solidification versus top-down solidification of the liquid core of the relatively small planetary bodies

[SIT25-03] P-wave velocity of Fe₃S under high pressure and temperature

[SIT25-04] The sound velocity of liquid Fe-Ni-S-Si alloys under Mercury’s core condition

[SIT25-05] In situ observation of Rayleigh–Taylor instability growth of liquid Fe-Si using laser shock

Authentication

Session information

[S-IT25] Planetary cores: Structure, formation, and evolution

[SIT25-01] High-pressure Equation of State of Schreibersite Fe2.15Ni0.85P: Implications for the Martian Core

[SIT25-02] Bottom-up solidification versus top-down solidification of the liquid core of the relatively small planetary bodies

[SIT25-03] P-wave velocity of Fe3S under high pressure and temperature

[SIT25-04] The sound velocity of liquid Fe-Ni-S-Si alloys under Mercury’s core condition

[SIT25-05] In situ observation of Rayleigh–Taylor instability growth of liquid Fe-Si using laser shock

Authentication

[SIT25-01] High-pressure Equation of State of Schreibersite Fe_2.15Ni_0.85P: Implications for the Martian Core

[SIT25-03] P-wave velocity of Fe₃S under high pressure and temperature