Thu. May 29, 2025 1:45 PM - 3:15 PM 304 (International Conference Hall, Makuhari Messe)

[J] Oral
| P (Space and Planetary Sciences )
| P-PS Planetary Sciences

[P-PS07] Formation and evolution of planetary materials in the Solar System

2:15 PM - 2:30 PM

[PPS07-15] Depth variation in elemental and isotopic compositions of solar wind noble gases

*Yuta Otsuki¹, Ken-ichi Bajo², Tomoya Obase^2,3, Rainer Wieler⁴, Hisayoshi Yurimoto² (1.Department of Natural History Sciences, Hokkaido University, 2.Faculty of Science, Hokkaido University, 3.Institute of Science Tokyo, 4.ETH Zürich)

Tue. May 27, 2025 10:45 AM - 12:15 PM Exhibition Hall Special Setting (1) (Exhibition Hall 7&8, Makuhari Messe)

[E] Oral
| S (Solid Earth Sciences )
| S-IT Science of the Earth's Interior & Techtonophysics

[S-IT21] Understanding the first 150 million years of the solar system

11:00 AM - 11:15 AM

[SIT21-02] Energetic solar activity from the first million years to present: Insights from noble gases in planetary materials

★Invited Papers

*Tomoya Obase¹, Ken-ichi Bajo², Megumi Matsumoto³, Daisuke Nakashima³, Sohei Wada², Yuta Otsuki², Hisayoshi Yurimoto² (1.Institute of Science Tokyo, 2.Hokkaido University, 3.Tohoku University)

Tue. May 27, 2025 10:45 AM - 12:15 PM Convention Hall (CH-B) (International Conference Hall, Makuhari Messe)

[J] Oral
| S (Solid Earth Sciences )
| S-VC Volcanology

[S-VC32] Active Volcanism

11:30 AM - 11:45 AM

[SVC32-19] Volcanic activity assessment using temporal and spatial variations of helium isotope ratios around Ebinokogen Iwo-yama, Kirishima volcanic group, Japan

*Nanae Fukushima¹, Hirochika Sumino¹, Takeshi Ohba², Muga Yaguchi³, Jun-ichiro Ishibashi⁴, Yuki Yasuda⁵, Tomoya Obase⁶, Kotaro Toyama⁷, Takeshi Matsushima⁸ (1.Research Center for Advanced Science and Technology, The University of Tokyo, 2.Department of chemistry, School of Science, Tokai University, 3.Meteorological Research Institute, JMA, 4.Kobe Ocean-Bottom Exploration Center, 5.Earthquake Research Institute, The University of Tokyo, 6.School of Science, Institute of Science Tokyo, 7.Hot Springs Research Institute of Kanagawa Prefecture, 8.Institute of Seismology and Volcanology, Faculty of Science, Kyushu University)

Tue. May 27, 2025 3:30 PM - 5:00 PM 301A (International Conference Hall, Makuhari Messe)

[E] Oral
| S (Solid Earth Sciences )
| S-GC Geochemistry

[S-GC37] Volatiles in the Earth - from Surface to Deep Mantle

4:30 PM - 4:45 PM

[SGC37-15] MORB-like mantle noble gases beneath the oldest oceanic plate

★Invited Papers

*Tomoya Obase¹, Hirochika Sumino², Kazuto Mikuni^1,3, Shiki Machida⁴, Naoto Hirano⁵ (1.Institute of Science Tokyo, 2.The University of Tokyo, 3.AIST, 4.Chiba Institute of Technology, 5.Tohoku University)

Fri. May 30, 2025 5:15 PM - 7:15 PM Poster Hall (Exhibition Hall 7&8, Makuhari Messe)

[J] Poster
| M (Multidisciplinary and Interdisciplinary)
| M-ZZ Others

[M-ZZ42] Frontiers in geochemistry: new challenges and future prospects

5:15 PM - 7:15 PM

[MZZ42-P04] Distribution coefficients of 29 elements on anion-exchange resin in HCl–2-propanol mixtures

*Tomoya Obase¹, Tetsuya Yokoyama¹ (1.Institute of Science Tokyo)

Tomoya Obase

Speaker, Author, Co-Author

★Invited Papers

★Invited Papers