JpGU-AGU Joint Meeting 2020

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

[S-IT26] Interaction and Coevolution of the Core and Mantle in the Earth and Planets

convener:Kenji Ohta(Department of Earth and Planetary Sciences, Tokyo Institute of Technology), Tsuyoshi Iizuka(University of Tokyo), Kenji Kawai(Department of Earth and Planetary Science, School of Science, University of Tokyo), Taku Tsuchiya(Geodynamics Research Center, Ehime University)

Recent observational and experimental investigations have significantly advanced our understanding of the structure and constituent materials of the deep Earth. Yet, even fundamental properties intimately linked with formation and evolution of the planet, such as details of the chemical heterogeneity in the mantle and light elements dissolved in the core, remain unclear. Seismological observations have suggested a vigorous convection in the lower mantle, whereas geochemistry has suggested the presence of stable regions there that hold ancient isotope signatures. The amounts of radioactive isotopes that act as heat sources and drive dynamic behaviors of the deep Earth are also still largely unknown. We provide an opportunity to exchange the achievements and ideas, and encourage persons who try to elucidate these unsolved issues of the core-mantle evolution using various methods, including high-pressure and high-temperature experiments, high-precision geochemical and paleomagnetic analyses, high-resolution geophysical observations, geo-neutrino observations, and large-scale numerical simulations. Papers stimulating an interdisciplinary collaboration relating to establishment of the Japan-SEDI community are also welcomed.

[SIT26-P02] Quantitative evaluation of the geochemical correlation length within the single granitic body, toward the error estimation of geoneutrino flux from the Japanese crust

*Kenta Ueki1, Minami Kazuki2, Akimichi Taketa2, Tsuyoshi Iizuka3, Sanshiro Enomoto4, Nozomu Takeuchi2, Hiroyuki Tanaka2 (1.Japan Agency for Marine-Earth Science and Technology, 2.Earthquake Research Institute, the University of Tokyo, 3.Department of Earth and Planetary Science, The University of Tokyo, 4.University of Washington, Department of physics)

[SIT26-P05] Seismic structure near the inner core boundary in the north polar region

*Toshiki Ohtaki1, Satoru Tanaka2, Satoshi Kaneshima3, Weerachai Siripunvaraporn4,5, Songkhun Boonchaisuk5,6, Sutthipong Noisagool4,5, Kenji Kawai7, Taewoon Kim2, Yuki Suzuki7, Yasushi Ishihara2, Koji MIYAKAWA8, Nozomu Takeuchi8, Hitoshi Kawakatsu8 (1.Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology (AIST), 2.Japan Agency for Marine-Earth Science and Technology (JAMSTEC), 3.Department of Earth and Planetary Sciences, Faculty of Sciences, Kyushu University, 4.Faculty of Science, Mahidol University, Kingdom of Thailand, 5.ThEP Center, Commission on Higher Education, Kingdom of Thailand, 6.Geoscience Program, Mahidol University, Kingdom of Thailand, 7.Graduate School of Science, University of Tokyo, 8.Earthquake Research Institute, University of Tokyo)

[SIT26-P09] In situ X-ray and neutron diffraction studies of hcp iron hydride

*Sho Kakizawa1,2, Hiroyuki Kagi2, Chikara Shito2, Hiroyuki Saitoh3, Yuji Higo4, Yoshinori Tange4, Asami Sano-Furukawa5, Takanori Hattori5, Katsutoshi Aoki2 (1.Hiroshima University, 2.Geochemical Research Center, The University of Tokyo, 3.National Institutes for Quantum Radiological Science and Technology, 4.Japan Synchrotron Radiation Research Institute, 5.J-PARC center, Japan Atomic Energy Agency)