ユニオン(U)
セッション小記号ユニオン
セッションIDU-02
タイトル和文Pacific-type orogeny: From ocean to mantle
英文Pacific-type orogeny: From ocean to mantle
タイトル短縮名和文Pacific-type orogeny
英文Pacific-type orogeny
代表コンビーナ氏名和文Inna Safonova
英文Inna Safonova
所属和文Novosibirsk State University
英文Novosibirsk State University
共同コンビーナ 1氏名和文辻森 樹
英文Tatsuki Tsujimori
所属和文東北大学
英文Tohoku University
共同コンビーナ 2氏名和文磯崎 行雄
英文Yukio Isozaki
所属和文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
英文Department of Earth Science and Astronomy, Multi-disciplinary Sciences - General Systems Studies, Graduate School of Arts and Sciences, The University of Tokyo
共同コンビーナ 3氏名和文小宮 剛
英文Tsuyoshi Komiya
所属和文東京大学大学院総合文化研究科広域科学専攻
英文Department of Earth Science & Astronomy Graduate School of Arts and Sciences The University of Tokyo
発表言語EE
スコープ和文
英文Pacific-type convergent margins (ocean - continent) and their related orogenic belts exist/form over subduction zones, which are the only ways to deliver surface materials to the deep mantle. Pacific-type orogens keep records of the evolution of paleo-oceans, formation and transformation of continental crust at their active margins, and generation of hydrous-carbonated plumes in the mantle transition zone (MTZ) and its related intra-plate magmatism. An approach linking paleo-oceans, active margins and plume magmatism stands on three "whales": the model of Ocean Plate Stratigraphy (OPS), the parameters of active convergent margins and the model of hydrous-carbonated plumes. The OPS model was created by many detailed studies of western Pacific, in particular Japanese, accretionary complexes; it allows recognizing different oceanic plates within one paleo-ocean and evaluating their sizes and ages. Pacific-type convergent margins are places of major continental growth by island-arc juvenile magmatism and accretion, but they are also places of strong plate interactions and crust destruction. There are two contrast types of those margins: accreting ones accompanied by the formation of accretionary complexes, and eroding ones accompanied by the tectonic and subduction erosion of accretionary wedge, fore-arc prism and volcanic arc. The materials of oceanic and continental crust, which are eroded at Pacific-type convergent margins, can accumulate in the MTZ and affect mantle conditions. All those processes, the subduction of hydrated and carbonated oceanic crust, the destruction of continental crust at eroding margins, and the accumulation of mafic and sialic materials in the MTZ can synergistically trigger the generation of hydrous-carbonated mantle plumes in the MTZ, mantle melting and upwelling, and intra-plate continental magmatism. We welcome papers on results from Pacific-type orogenic belts worldwide and from Archean to Cenozoic ages.
発表方法口頭および(または)ポスターセッション
招待講演
  • 丸山 茂徳 (東京工業大学地球生命研究所)
  • 磯崎 行雄 (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)
  • 大谷 栄治 (東北大学大学院理学研究科地学専攻)
  • Inna Safonova (Novosibirsk State University, Sobolev Institute of Geology and Mineralogy SB RAS)
  • Konstantin Litasov (V.S. Sobolev Institute of Geology and Mineralogy SB RAS, Novosibirsk, Russia)
  • 趙 大鵬 (東北大学大学院理学研究科附属地震・噴火予知研究観測センター)
  • Min Sun (University of Hong Kong)
  • 辻森 樹 (東北大学東北アジア研究センター, 東北大学大学院理学研究科地学専攻)
時間 講演番号 タイトル 発表者 予稿原稿
口頭発表 5月24日 PM1
13:45 - 14:00 U02-01付加体地質学の体系化とその重要性丸山 茂徳予稿
14:00 - 14:15 U02-02顕生代太平洋岸造山帯(Nipponides)と中央アジア造山帯磯崎 行雄予稿
14:15 - 14:30 U02-03Role of water transported into the deep mantle by subducting slabs大谷 栄治予稿
14:30 - 14:45 U02-04Carbonates and carbonate melts in the Earth's mantleIgor Sharygin予稿
14:45 - 15:00 U02-05Tectonic erosion at Pacific-type convergent margins: evidence from the western Central Asian Orogenic BeltInna Safonova予稿
15:00 - 15:15 U02-06Tectonic erosion and subduction of continental materials to mantle transition zone: The role of volatiles and heat-producing components for plume generationKonstantin Litasov予稿
口頭発表 5月24日 PM2
15:30 - 15:45 U02-07東アジア造山帯と沈み込み帯の地震学的構造趙 大鵬予稿
15:45 - 16:00 U02-08Five major stages for Phanerozoic accretionary processes in Japan, related to the arrangement of continents and subduction zones in East and Southeast Asia.脇田 浩二予稿
16:00 - 16:15 U02-09白亜紀のユーラシア大陸縁辺の発達に対する海洋性沈み込み帯の寄与:東北日本弧からの考察植田 勇人予稿
16:15 - 16:30 U02-10The Pacific Ocean: License to kill... Cratons!Daniel Pastor-Galán予稿
16:30 - 16:45 U02-11Prevalence of ~800 Ma magmatism in the northern part of the Central Asian orogenic belt.Uyanga Bold予稿
16:45 - 17:00 U02-12Variation of Nd isotopic compositions for basaltic rocks of the ophiolites from the Central Asian Orogenic Belt – implication for a transition of subduction systems in the Paleozoic?Min Sun予稿
講演番号 タイトル 発表者 予稿原稿
ポスター発表 5月24日 コア
U02-P01 深海洋底の起源,環太平洋弧状列島と背弧凹プレート起源,プレートテクトニクスの駆動メカニズム起源,テチス海とインド洋の起源 種子 彰 予稿
U02-P02 三つの初期大古代表成岩体の地質学的比較:イスア表成岩帯、ヌリアック表成岩類とヌブアギツック表成岩帯 小宮 剛 予稿
U02-P03 Lawsonitology: in-situ LA-ICPMS Sr-Pb isotope analyses 原 智美 予稿
U02-P04 Nature of slab-derived fluids in Pacific-type subduction zone: Oxygen and hydrogen isotope studies of phengites from Renge and Sambagawa metasedimentary rocks 辻森 樹 予稿
U02-P05 Zircon Hf isotopic evidences for incorporation of crustal components in early Cretaceous adakitic plutonism in the Kitakami Mountains, NE Japan 臼杵 直 予稿