2021年6月5日(土) 13:45 〜 15:15 Ch.23 (Zoom会場23)

コンビーナ:羽生 毅(海洋研究開発機構 海域地震火山部門)、E Gray Bebout(Lehigh University)、佐野 有司(東京大学大気海洋研究所海洋地球システム研究系)、角野 浩史(東京大学大学院総合文化研究科広域科学専攻広域システム科学系)、座長:佐野 有司(高知大学海洋コア総合研究センター)、羽生 毅(海洋研究開発機構 海域地震火山部門)

Volatiles play an important role in the dynamical and chemical processes in the Earth. The presence of volatiles drastically changes mineral stability and rheological behavior of the rocks. Chemical fractionation, such as partial melting, hydration, and dehydration are controlled by volatiles in the rocks. Volatiles enhance the production of magmas and drive their ascent and volcanic eruption. The atmosphere and hydrosphere have been generated by variety of 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 characteristic, 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.