[S-GC45] Volatiles in the Earth - from Surface to Deep Mantle

Mon. May 25, 2026 1:45 PM - 3:15 PM Convention Hall (CH-B) (International Conference Hall, Makuhari Messe)

Chairperson:Sumino Hirochika(Research Center for Advanced Science and Technology, The University of Tokyo), Lee Hyunwoo(Seoul National University)

Volatiles play an essential role in the dynamic and chemical processes in the Earth's interior. The presence of volatiles drastically changes the mineral stability and rheological behavior of the rocks. Chemical fractionation, such as partial melting, hydration, and dehydration, is controlled by volatiles in the rocks. Volatiles enhance the production of magma and drive their ascent and volcanic eruption. The atmosphere and hydrosphere have been generated by various degassing events from the mantle through volcanism. Some volatiles in the Earth's surface have been suggested to be recycled back into the mantle beyond subduction zones. Although the significance of volatiles in the Earth's evolution has been recognized, each of these processes is poorly constrained. We therefore welcome contributions from experimental, observational, and modeling studies that help shed light on the behavior, chemical/physical characteristics, and flux/budget of volatiles, such as hydrogen, carbon, nitrogen, noble gases, halogens, and sulfur. We encourage studies linking the behavior of multiple volatile elements and their isotopic compositions. Studies investigating the linkage between volatile and solid geochemical tracers, the phase equilibria of volatile-bearing mantle assemblages, and the effect of volatiles on the physical properties of the mantle are also welcome.

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1:45 PM - 2:00 PM

[SGC45-13] Temporal Evolution of Hydrothermal System in the Tatun Volcano Group: Insights into Potential Volcanic Activity

★Invited Papers

*AITI CHEN¹, Hsiao-fen Lee², Yuji Sano³, Naoto Takahata⁴, Takanori Kagoshima⁵, Ya-chuan Lai², Li-Hung Lin¹, CHENG-HORNG LIN⁶, Ching-Hua Lo¹ (1. Department of Geosciences, National Taiwan University, 2. National Center for Research on Earthquake Engineering, National Institutes of Applied Research, 3. Center for Advanced Marine Core Research, Kochi University, 4. Atmosphere and Ocean Research Institute, The University of Tokyo, 5. Graduate School of Science and Engineering, University of Toyama, 6. Institute of Earth Sciences, Academia Sinica)

2:00 PM - 2:15 PM

[SGC45-14] Helium and carbon isotope geochemistry of mantle-derived volatiles in Jeju Island, Korea

*Hyunwoo Lee¹, Minyoung Choi^1,2, Heejun Kim³, Naoto Takahata⁴, Yuji Sano⁵ (1. Seoul National Univ., 2. POSCO Intl., 3. KIOST, 4. AORI, Univ. of Tokyo, 5. Kochi Univ.)

2:15 PM - 2:30 PM

[SGC45-15] Lithium and Strontium Isotope Systematics of High-Temperature Hot Spring Waters from the Dōgo Area in the Non-Volcanic Forearc of Southwest Japan

★Invited Papers

*Zahra Zandvakili^1,2, Manato Akishiba^3,2, Yoshiro Nishio² (1. Fukushima University , 2. Kochi University, 3. Tohoku university)

2:30 PM - 2:45 PM

[SGC45-16] Long-term stability and transient increase in helium isotope ratios in the Kirishima volcano group: Signatures of deep magma injection

*Rai Yoneda¹, Hirochika Sumino², Masataka Kawaguchi³, Yasuhisa Tajima⁴, Toshiaki Hasenaka⁵ (1. School of Science, The University of Tokyo, 2. Research Center for Advance Science and Technology, The University of Tokyo, 3. Earthquake Research Institute, The University of Tokyo, 4. Research and Development Center, Nippon Koei Co.,LTD., 5. Center for Water Cycle Marine Environment and Disaster Management, Kumamoto University)

2:45 PM - 3:00 PM

[SGC45-17] Ultra-oxidized, ultra-calcic arc basalts from coupled Fe³⁺-rich lawsonite-derived melts and clinopyroxene-exhaustion melting: Insights from the 2021 Fukutoku-Oka-no-Ba eruption, Bonin arc

*Yuuki Hagiwara¹, Kenta K Yoshida¹, Kenji Shimizu¹, Takayuki Ushikubo¹, Noriko Tada¹, Qing Chang¹, Katsunori Kimoto¹, Tomoki Sato¹, Morihisa Hamada¹, Masayuki Obayashi¹, Takazo Shibuya¹, Takeshi Hanyu¹ (1. Japan Agency for Marine-Earth Science and Technology)

3:00 PM - 3:15 PM

[SGC45-18] Connecting magmatic volatiles with surface at Ruapehu volcano (New Zealand): implications for degassing mechanisms and intrusion-related hydrothermal systems

★Invited Papers

*Antonio M. Alvarez-Valero^1,2, Gabor Kereszturi³, Hirochika Sumino⁴, Luís Caro-Villafaina¹, Rachelle Sanchez³, Csaba Farkas¹, David Benavente⁵, Chris Conway⁶, Silvia Moreno-Alfonso³, Takumi Imura⁷, Masao Ban⁷ (1. Universidad de Salamanca - Departamento de Geología (Spain), 2. NUCLEUS - Servicio General de Análisis de Isótopos Estables - USAL (Spain), 3. University of Massey (New Zealand), 4. University of Tokyo (Japan), 5. Universidad de Alicante (Spain), 6. Geological Survey of Japan, 7. Yamagata University (Japan))

Session information

[S-GC45] Volatiles in the Earth - from Surface to Deep Mantle

[SGC45-13] Temporal Evolution of Hydrothermal System in the Tatun Volcano Group: Insights into Potential Volcanic Activity

★Invited Papers

[SGC45-14] Helium and carbon isotope geochemistry of mantle-derived volatiles in Jeju Island, Korea

[SGC45-15] Lithium and Strontium Isotope Systematics of High-Temperature Hot Spring Waters from the Dōgo Area in the Non-Volcanic Forearc of Southwest Japan

★Invited Papers

[SGC45-16] Long-term stability and transient increase in helium isotope ratios in the Kirishima volcano group: Signatures of deep magma injection

[SGC45-17] Ultra-oxidized, ultra-calcic arc basalts from coupled Fe³⁺-rich lawsonite-derived melts and clinopyroxene-exhaustion melting: Insights from the 2021 Fukutoku-Oka-no-Ba eruption, Bonin arc

[SGC45-18] Connecting magmatic volatiles with surface at Ruapehu volcano (New Zealand): implications for degassing mechanisms and intrusion-related hydrothermal systems

★Invited Papers

Authentication

Session information

[S-GC45] Volatiles in the Earth - from Surface to Deep Mantle

[SGC45-13] Temporal Evolution of Hydrothermal System in the Tatun Volcano Group: Insights into Potential Volcanic Activity

★Invited Papers

[SGC45-14] Helium and carbon isotope geochemistry of mantle-derived volatiles in Jeju Island, Korea

[SGC45-15] Lithium and Strontium Isotope Systematics of High-Temperature Hot Spring Waters from the Dōgo Area in the Non-Volcanic Forearc of Southwest Japan

★Invited Papers

[SGC45-16] Long-term stability and transient increase in helium isotope ratios in the Kirishima volcano group: Signatures of deep magma injection

[SGC45-17] Ultra-oxidized, ultra-calcic arc basalts from coupled Fe3+-rich lawsonite-derived melts and clinopyroxene-exhaustion melting: Insights from the 2021 Fukutoku-Oka-no-Ba eruption, Bonin arc

[SGC45-18] Connecting magmatic volatiles with surface at Ruapehu volcano (New Zealand): implications for degassing mechanisms and intrusion-related hydrothermal systems

★Invited Papers

Authentication

[SGC45-17] Ultra-oxidized, ultra-calcic arc basalts from coupled Fe³⁺-rich lawsonite-derived melts and clinopyroxene-exhaustion melting: Insights from the 2021 Fukutoku-Oka-no-Ba eruption, Bonin arc