JpGU-AGU Joint Meeting 2026

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[E] 口頭発表

セッション記号 S (固体地球科学) » S-GC 固体地球化学

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

2026年5月25日(月) 09:00 〜 10:30 コンベンションホール (CH-B) (幕張メッセ国際会議場)

座長:清水 健二(海洋研究開発機構　高知コア研究所)、羽生 毅(海洋研究開発機構 海域地震火山部門)

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.

09:00 〜 09:15

[SGC45-01] Geochemical and petrological evidence of metasomatic processes modifying the mantle beneath central Italy

★Invited Papers

*Laura Italiano1, Ilenia Arienzo2, Bruna Cariddi2, Gabriele Carnevale3, Claudio Chiarabba4, Massimo Coltorti5, Barbara Faccini5, Genny Giacomuzzi6, Michele Paternoster7,3, Silvio Giuseppe Rotolo1,3, Filippo Zummo7, Antonio Caracausi3 (1. University of Palermo, Dipartimento di scienze della Terra e del Mare, Palermo, Italy, 2. Istituto Nazionale di Geofisica e Vulcanologia, Sezione di Napoli (OV), Napoli, Italy, 3. Istituto Nazionale di Geofisica e Vulcanologia, Sezione di Palermo, Palermo, Italy, 4. Istituto Nazionale di Geofisica e Vulcanologia, Osservatorio Nazionale Terremoti (ONT), Roma, Italy, 5. Università di Ferrara, Department of Environmental and Prevention Sciences, University of Ferrara, Italy, 6. Istituto Nazionale di Geofisica e Vulcanologia, Sezione di Bologna, Bologna, Italy, 7. Università della Basilicata, Dipartimento di Scienze, Potenza, Italy)

09:15 〜 09:30

[SGC45-02] A window into the north Antarctica mantle: volatiles from the active volcano of Deception Island

*Antonio Caracausi1, Antonio Polo-Sánchez2, Antonio M. Álvarez-Valero2, Jabrane Labidi3, Edward D. Young4, Hirochika Sumino5, Conxita Ávila6, Dario Buttitta1, Adelina Geyer7, Paolo Randazzo1 (1. Istituto Nazionale di Geofisica e Vulcanologia (INGV) sezione di Palermo. Via Ugo La Malfa, 153. 90146, Palermo, Italy, 2. Departamento de Geología, Universidad de Salamanca, Plaza de la Merced s/n, 37008, Salamanca, Spain, 3. Institut de Physique du Globe de Paris, Université de Paris, CNRS, 1 Rue Jussieu, 75005, Paris, France, 4. 4Department of Earth, Planetary and Space Sciences, UCLA, 595 Charles E Young Dr, 90095 Los Angeles, USA, 5. Research Center for Advanced Science and Technology, University of Tokyo, 153-8904 Tokyo, Japan, 6. Departament de Biologia Evolutiva, Ecologia i Ciències Ambientals, Universitat de Barcelona, Av. Diagonal 643, 08028 Barcelona, Spain, 7. Geosciences Barcelona (GEO3BCN), CSIC, Lluís Solé i Sabarís s/n, 08028 Barcelona, Spain)

09:30 〜 09:45

[SGC45-03] Noble gases in fluid inclusions of polycristalline and fibrous diamonds of Diavik, NW Territories, Canada: a window on the Slave craton mantle

★Invited Papers

*Daniele Luigi Pinti1, Lucille Daver2, Hélène Bureau3, Thomas Stachel4 (1. Geotop Research Center, Université du Québec à Montréal, QC, Canada, 2. Consortium de recherche en exploration minérale (CONSOREM), Université du Québec à Chicoutimi, QC, Canada, 3. Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie (IMPMC), Sorbonne Université, France, 4. Earth & Atmospheric Sciences, University of Alberta, Edmonton, AB, Canada)

10:00 〜 10:15

[SGC45-05] Volatile composition of basalts from the Ontong Java Plateau

*羽生 毅1、清水 健二2、牛久保 孝行2、常 青1、萩原 雄貴1、浜田 盛久1、木元 克典3、山本 順司4、佐野 貴司5、Tejada Maria Luisa1 (1. 海洋研究開発機構 海域地震火山部門、2. 海洋研究開発機構　高知コア研究所、3. 海洋研究開発機構 地球環境部門、4. 九州大学　理学研究院、5. 国立科学博物館　理学研究部)

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