[E] Oral

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

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

Fri. May 30, 2025 1:45 PM - 3:15 PM 106 (International Conference Hall, Makuhari Messe)

convener:Riko Iizuka-Oku(Department of Earth Sciences, School of Education, Waseda University), Yoichi Nakajima(Department of Physics, Kumamoto University), Ryosuke Sinmyo(Meiji University), Saori Kawaguchi-Imada(DECTRIS Japan K.K./ Shimane University), Chairperson:Riko Iizuka-Oku(Department of Earth Sciences, School of Education, Waseda University), Ryosuke Sinmyo(Meiji University)

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 structures. Defining properties of cores and core materials are therefore important for understanding their internal structures, evolution, and thermal profile. Recent advances in experimental and theoretical studies provide new insights into the Earth's cores and the cores of other terrestrial bodies. We seek to understand the nature and role of light elements in the early history of planets and better define their current state. Recent, on-going 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 welcome 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 presentations stimulating an interdisciplinary collaboration relating to establishment of the Study of Earth Deep Interior (SEDI)-Japan community. The Commission of Physics of Minerals of the International Mineralogical Association (CPM-IMA) sponsors this session.

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1:45 PM - 1:50 PM

[SIT18_30PM1-1add] Introduction

1:50 PM - 2:15 PM

[SIT18-01] Planetary cores seen by the coda correlation wavefield

★Invited Papers

*Hrvoje Tkalčić¹, Sheng Wang^1,2, Xiaolong Ma¹, Thanh Son Pham¹, Thuany Patricia Costa de Lima¹, Yun-Ze Cheng¹, Minog Kim^1,3 (1.The Australian National University, 2.ETH Zürich, 3.Pukyong University)

2:15 PM - 2:30 PM

[SIT18-02] Density of iron-rich peridotitic melt: Implication for dense silicate melt layer above Mars' core

*Yoshio Kono¹, Chihiro Koyama², Nozomi Kondo³, Koji Ohara⁴, Hideharu Kuwahara⁵, Ryoichi Nakada⁶, Yuki Watanabe⁷, Hirohisa Oda², Takehiko Ishikawa² (1.Kwansei Gakuin University, 2.Japan Aerospace Exploration Agency (JAXA), 3.Okayama University, 4.Shimane University, 5.Ehime University, 6.Japan Agency for Marine-Earth Science and Technology (JAMSTEC), 7.Advanced Engineering Services Co., Ltd.)

2:30 PM - 2:45 PM

[SIT18-03] Melting curve of FeS at Martian core condition

Ko Morioka¹, *Hidenori Terasaki¹, Saori Kawaguchi-Imada², Kokoro Kurosaka¹, Tadashi Kondo³, Moe Sakurai¹, Akira Yoneda³, Satoru Urakawa¹ (1.Grad. school Environmental, Life, Natural science and Technology, Okayama Univ., 2.JASRI, 3.Grad. school Science, Osaka Univ.)

2:45 PM - 3:00 PM

[SIT18-04] The effects of O and Si incorporation to liquid iron on the high-P,T metal silicate partition of S obtained based on first-principles calculations

*KEI ITOH^1,2, Taku Tsuchiya² (1.Graduate School of Science and Engineering, Ehime University, 2.GRC, Ehime University)

3:00 PM - 3:15 PM

[SIT18-05] Core-mantle partitioning and the bulk Earth abundances of hydrogen and carbon: Implications for their origins and delivery timing

*Kei Hirose^1,4, Yutaro Tsutsumi¹, Naoya Sakamoto², Shuhei Mita¹, Shunpei Yokoo¹, Han Hsu³, Hisayoshi Yurimoto² (1.The University of Tokyo, 2.Hokkaido University, 3.National Central University, 4.Institute of Science Tokyo)

Session information