[S-IT22] 地球深部科学と材料科学との融合による新展開

2026年5月27日(水) 09:00 〜 10:30 コンベンションホール (CH-A) (幕張メッセ国際会議場)

座長:石井貴之(岡山大学惑星物質研究所)、辻野典秀(公益財団法人高輝度光科学研究センター)

Recent geophysical and geochemical observations, together with experimental and theoretical studies, have greatly advanced our understanding of the Earth's deep interior. Nevertheless, key questions, such as the heterogeneous structure of the silicate mantle, the composition of light elements in the iron core, and the mechanisms of Earth's formation and evolution, remain unresolved. Meanwhile, collaborative efforts between Earth sciences and materials sciences are providing new insights into the physical and chemical behavior of deep Earth materials, including core-mantle interaction and their coevolution.
This joint session aims to create an interdisciplinary forum that integrates cutting-edge results from geophysics, geochemistry, mineral physics, computational science, and materials science to deepen our understanding of Earth and planetary interiors. We particularly welcome studies employing innovative methods and technologies such as high-resolution electron microscopy, high-precision paleomagnetic measurements, geophysical and geochemical observations, geoneutrino detection, large-scale multiscale simulations of mantle convection and the geodynamo, high-pressure mineral physics, and machine-learning techniques for predicting material properties.
By promoting active exchange among participants and combining expertise across disciplines, this session seeks to stimulate new research directions and strengthen cross-field collaborations. Presentations related to the development of the Japanese Deep Earth and Planetary Research Group (SEDI-J) are also encouraged. The session is sponsored by the Commission on Physics of Minerals, International Mineralogical Association (CPM-IMA).

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09:00 〜 09:30

[SIT22-01] Experimental constraints on the heterogeneous thermal structures at Earth’s deep mantle

★Invited Papers

*Wen-Pin Hsieh^1,2 (1. Institute of Earth Sciences, Academia Sinica, Nankang, Taipei 11529, Taiwan, 2. Department of Geosciences, National Taiwan University, Taipei 10617, Taiwan)

09:30 〜 09:45

[SIT22-02] Lattice Thermal Conductivity of Bridgmanite in Lower Mantle.

*Chiao-Chen Wu^1,2, Wen-Pin Heish^1,2 (1. Institute of Earth Sciences, Academia Sinica, 2. Department of Geosciences, National Taiwan University, Taipei, Taiwan)

09:45 〜 10:00

[SIT22-03] Crystallization of an iron-rich basal magma ocean and the formation of LLSVPs

*山本昂生¹、廣瀬敬^1,2 (1. 東京大学、2. 東京科学大学　地球生命研究所)

10:00 〜 10:15

[SIT22-04] Sound velocity measurements of ferric-iron-bearing pyroxene glass to lower-mantle pressures by inelastic X-ray scattering

*増野いづみ¹、福井宏之^2,3、石川大介^2,3、北尾真司⁴、瀬戸誠⁴、バロンアルフレッド^2,3 (1. 岡山大学惑星物質研究所、2. 理研放射光科学研究センター、3. 日本高輝度光科学研究センター、4. 京都大学複合原子力科学研究所)

10:15 〜 10:30

[SIT22-05] Low shear velocities of breyite and its implications for the depth origin of CaSiO₃diamond inclusion

*Steeve Greaux¹, Jiejun Jing¹, Yoshihiro Inoue¹, Yoshio Kono², Sho Kakizawa³, Itaru Ohira⁴, Noriyoshi Tsujino³, Yuji Higo³ (1. Geodynamics Research Center, Ehime University, 2. Department of Physics and Astronomy, Kwansei Gakuin University, 3. Japan Synchrotron Radiation Research Institute (JASRI), 4. Department of Chemistry, Gakushuin University)