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

2026年5月25日(月) 10:45 〜 12:15 コンベンションホール (CH-B) (幕張メッセ国際会議場)

座長:羽生毅(海洋研究開発機構海域地震火山部門)、Caracausi Antonio(National Institute of Geophysics and Volcanology)

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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10:45 〜 11:00

[SGC45-07] Noble Gas Isotopic Constraints on Mantle Circulation: Insights from North Pacific Petit-Spot Mantle Xenoliths

新井孝彰²、*角野浩史¹、福島菜奈絵¹、平野直人³、町田嗣樹⁴、石川晃⁵、秋澤紀克⁶ (1. 東京大学先端科学技術研究センター、2. 東京大学大学院理学系研究科、3. 東北大学東北アジア研究センター、4. 千葉工業大学次世代海洋資源研究センター、5. 東京工業大学理学院地球惑星科学系、6. 広島大学大学院先進理工系科学研究科)

11:00 〜 11:15

[SGC45-08] オフィカーボネートの流体包有物の水素・酸素同位体は中央海嶺下熱水流体から軽い水素・酸素の天水方向に変化する

*川本竜彦¹、植村立²、松田惠嗣¹、北島玲悦¹、田中冬馬¹、金子広幸¹、大澤陽介¹、犬飼知弘¹、影田樹哉¹、田阪美樹¹、谷内元⁶、阿部理²、コガケネス³、ローズコガエステル³、メネギーニフランチェスカ⁵、ニコレクリスチャン⁴ (1. 静岡大学理学部地球科学科、2. 名古屋大学大学院環境科学研究科、3. オルレアン大学地球科学科、4. クレルモン大学マグマと火山の研究所、5. ピサ大学地球科学科、6. 産業技術総合研究所)

11:15 〜 11:30

[SGC45-09] Influence of Hydration in Deep Volatile Transport Across the Akimotoite-Bridgmanite Transition in Cold Slabs

*Priyanka Pandit¹, Gaurav Shukla^1,2 (1. Indian Institution of Science Education and Research Kolkata , 2. National Center for High Pressure Studies,Kalyani,India)

11:30 〜 11:45

[SGC45-10] Shimanto shales record coupled light stable isotope fractionation in the shallow subduction channel

★Invited Papers

*Michael R Hudak¹, Maureen D Feineman², Hanh-Tu Ella Do^3,2, Samuele Agostini⁴ (1. Williams College, MA, USA, 2. The Pennsylvania State University, PA, USA, 3. Università di Bologna, Bologna, Italy, 4. Consiglio Nazionale delle Ricerche, Istituto di Geoscienze e Georisorse, Pisa, Italy)

11:45 〜 12:00

[SGC45-11] Intra-grain path and storage of mantle melts/fluids inferred from mantle-derived olivine xenocrysts

*塚脇遼¹、江島輝美¹、二ノ宮淳²、佐藤侑人³、角野浩史⁴、昆慶明⁶、荒井章司⁵ (1. 信州大、2. 住鉱資源開発、3. JAMSTEC高知コア研、4. 東京大・先端研、5. 金沢大、6. 産総研)

12:00 〜 12:15

[SGC45-12] Gas geochemistry of hot springs associated with an earthquake swarm in northeastern Yamaguchi, Japan

*Donghwan Kim¹, Takanori Kagoshima², Naoto Takahata¹, Takaaki Shirai³, Yuji Sano⁴, Naoshi Hirata⁵ (1. Atmosphere and Ocean Research Institute, The University of Tokyo, 2. University of Toyama, 3. Hagi Geopark Promotion Council, Hagi City Office, 4. Center for Advanced Marine Core Research, Kochi University, 5. Earthquake Research Institute, The University of Tokyo)

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