日本地球惑星科学連合2016年大会

セッション情報

インターナショナルセッション(ポスター発表)

セッション記号 S (固体地球科学) » S-GC 固体地球化学

[S-GC16] Volatile Cycles in the Deep Earth - from Subduction Zones to the Mantle and Core

2016年5月25日(水) 17:15 〜 18:30 ポスター会場 (国際展示場 6ホール)

コンビーナ:*角野 浩史(東京大学大学院総合文化研究科広域科学専攻相関基礎科学系)、羽生 毅(海洋研究開発機構 地球内部物質循環研究分野)、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)、Jackson Colin(Geophysical Laboratory, Carnegie Institution of Washington)

Volatiles influence dynamics and chemical differentiation in the mantle and crust by drastically changing mineral stability and rheological behavior. Fractionation processes such as partial melting, hydration, and dehydration are all controlled by volatiles in the rocks. A significant portion of the volatiles in the Earth has been thought to be present in the atmosphere and oceans as a consequence of extensive degassing during accretion and subsequent mantle degassing. On the other hand, it has been recently recognized that significant amounts of volatiles are recycled back into the mantle at subduction zones, where intensive devolatilization of subducted materials during arc magma generation was once thought to act as an effective "subduction barrier". However, fundamental questions still remain, such as: how are volatiles species distributed throughout the early and present day Earth? What are the mechanisms for, and rate at which, volatiles are fluxed between the atmosphere, crust, shallow, and deep mantle? And what role have volatiles played in driving the evolution of the Earth? The possible role of the core in storing primordial volatiles is also poorly constrained.
We therefore welcome contributions from experimental, observational, and modeling studies that help shed light on the deep cycles of volatiles, such as hydrogen, carbon, nitrogen, noble gases, halogens and sulfur. We particularly encourage studies linking the behavior of multiple volatile elements or their isotopes. 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.

17:15 〜 18:30

*Iona McIntosh1Alexander Nichols1Kenichiro Tani2Ed Llewellin3Ian Schipper4Bob Stewart5 (1.Japan Agency for Marine-Earth Science and Technology, Japan、2.National Museum of Nature and Science, Japan、3.Durham University, UK、4.Victoria University of Wellington, NZ、5.Massey University, NZ)

17:15 〜 18:30

Jalowitzki Tiago1、*角野 浩史2Conceição Rommulo1Orihashi Yuji3Nagao Keisuke4Bertotto Gustavo5Balbinot Eduardo6Schilling Manuel7Gervasoni Fernanda8 (1.Universidade Federal do Rio Grande do Sul、2.Dept. of Basic Science, Grad. School of Arts and Sciences, Univ. of Tokyo、3.Earthquake Research Institute, Univ. of Tokyo、4.Korea Polar Research Institute、5.CONICET, Universidad Nacional de La Pampa、6.Univ. of Surrey、7.Universidad Austral de Chile、8.Westfählische-Wilhelms-Universität Münster)