セッション概要

固体地球科学(S) セッション小記号 地球内部科学・地球惑星テクトニクス(IT) セッションID S-IT04 タイトル 和文 Fluid flow, deformation and physical properties of the subduction boundary and forearc mantle 英文 Fluid flow, deformation and physical properties of the subduction boundary and forearc mantle タイトル短縮名 和文 Fluid and dynamic processes in forearc 英文 Fluid and dynamic processes in forearc 代表コンビーナ 氏名 和文 ウォリス サイモン 英文 Simon Wallis 所属 和文 名古屋大学大学院環境学研究科地球環境科学専攻地球惑星科学教室 英文 Department of Earth and Planetary Sciences, Nagoya University メールアドレス swallis@eps.nagoya-u.ac.jp 共同コンビーナ 1 氏名 和文 平松 良浩 英文 Yoshihiro Hiramatsu 所属 和文 金沢大学理工研究域自然システム学系 英文 School of Natural System, College of Science and Engineering, Kanazawa University メールアドレス yoshizo@hakusan.s.kanazawa-u.ac.jp 共同コンビーナ 2 氏名 和文 平内 健一 英文 Ken-ichi Hirauchi 所属 和文 静岡大学大学院理学研究科地球科学専攻 英文 Department of Geosciences, Graduate School of Science, Shizuoka University メールアドレス skhirau@ipc.shizuoka.ac.jp 共同コンビーナ 3 氏名 和文 水上 知行 英文 Tomoyuki Mizukami 所属 和文 金沢大学理工学域自然システム学類地球学コース 英文 Earth Science Course, School of Natural System, College of Science and Engineering, Kanazawa University メールアドレス peridot@staff.kanazawa-u.ac.jp 国際セッション開催希望 国際セッションとしての開催を希望する 発表主要言語 英語 スコープ 和文 Subduction brings oceanic crustal material into direct contact with the overlying mantle wedge. The subduction boundary changes its slip behaviour from seismic to aseismic with increasing depth. The deep forearc region around the tip of mantle wedge shows a transitional nature with episodic tremor and slip which are probably strongly influenced by sustained fluid flow. The amount of fluid release in the forearc is not well constrained but is thought to depend on the thermal structure of the subduction zone. Fluid released into the forearc mantle will cause a transformation of mantle rock to serpentinite. This metamorphic transformation implies a major volume change and a change in physical properties of the mantle. Despite considerable recent advances in understanding these processes, there is no good consensus on how strong this forearc region is likely to be or how fluids are transported. Such information is vital in developing more complete tectonic models of these geologically and geophysically important regions. In this session we aim to contribute to our understanding of the deep forearc by bringing together the results of a variety of different approaches including field based observations, experimental work, theoretical modeling and geophysical observations on deformation, reaction and physical properties in fluid-rock systems. 英文 Subduction brings oceanic crustal material into direct contact with the overlying mantle wedge. The subduction boundary changes its slip behaviour from seismic to aseismic with increasing depth. The deep forearc region around the tip of mantle wedge shows a transitional nature with episodic tremor and slip which are probably strongly influenced by sustained fluid flow. The amount of fluid release in the forearc is not well constrained but is thought to depend on the thermal structure of the subduction zone. Fluid released into the forearc mantle will cause a transformation of mantle rock to serpentinite. This metamorphic transformation implies a major volume change and a change in physical properties of the mantle. Despite considerable recent advances in understanding these processes, there is no good consensus on how strong this forearc region is likely to be or how fluids are transported. Such information is vital in developing more complete tectonic models of these geologically and geophysically important regions. In this session we aim to contribute to our understanding of the deep forearc by bringing together the results of a variety of different approaches including field based observations, experimental work, theoretical modeling and geophysical observations on deformation, reaction and physical properties in fluid-rock systems. 発表方法希望 口頭および（または）ポスターセッション 招待講演 Shoichi Yoshioka (Kobe Uni.) Atsushi Okamoto (Tohoku Uni.) Keishi Okazaki (Brown Uni.) Ikuko Wada (Tohoku University) Kazushige Obara (Tokyo Uni.)