8:45 AM - 9:00 AM

[T1-O-5] Nature of the plate boundary domain at the depth of deep slow earthquakes: evidence from the Sanbagawa belt

【ハイライト講演】

*Yukinojo KOYAMA¹, Simon R. WALLIS¹, Takayoshi NAGAYA¹ (1. Department of Earth and Planetary Science, Graduate School of Science, The University of Tokyo)

世話人よりハイライトの紹介：地球物理学的観測網の発展により，スロー地震が世界各地の沈み込み帯から発見されてきた．しかし、その発生機構は不明な点が多い．本発表は三波川変成岩の組織解析を基に，深部スロー地震発生深度における変形環境の特定を目指した研究である．プレート境界が幅広い連続変形領域であることを見出し，微細褶曲構造の形成と深部スロー地震現象との関係性も指摘している．スロー地震の地質学的描像を鮮明にする研究と期待される．※ハイライトとは

9:00 AM - 9:15 AM

[T1-O-6] Influence of pore fluid pressure on fracture pattern of mantle wedge serpentinites

*Ken-ichi Hirauchi¹, Yurina Nagata¹, Keishi Okazaki^2,3 (1. Shizuoka University, 2. Hiroshima University, 3. Kochi Institute for Core Sample Research, X-star, JAMSTEC)

9:15 AM - 9:30 AM

[T1-O-7] Naturally injected short-lived fluid flow in a single fracture related to seismic events in the middle crust.

*Diana Mindaleva¹, Masaoki Uno¹, Noriyoshi Tsuchiya¹ (1. Tohoku University)

9:30 AM - 9:45 AM

[T1-O-8] Transient fluid migration recorded in antigorite veins formed by subduction-related fluids

*Kazuki Yoshida¹, Ryosuke Oyanagi², Masao Kimura³, Oliver Plümper⁴, Mayuko Fukuyama⁵, Atsushi Okamoto¹ (1. Tohoku Univ., 2. Kokushikan Univ., 3. High Energy Accelerator Research Organization (KEK), 4. Utrecht Univ., 5. Akita Univ.)

9:45 AM - 10:00 AM

[T1-O-9] Various metasomatism of a mantle wedge by slab-derived materials: Examination of serpentinites in the Kamuikotan metamorphic belt, Hokkaido, Japan

*Shun Takamizawa¹, Yuji Ichiyama¹, Shusaku Yamazaki², Akihiro Tamura³, Tomoaki Morishita³ (1. Chiba University, 2. Civil Engineering Research Institute for Cold Region, 3. School of Geoscience and Civil Engineering, College of Science and Technology, Kanazawa University)

10:00 AM - 10:15 AM

[T1-O-10] Metasomatism and mass transfer at the slab-mantle interface in the subduction zone: Insights from serpentinite in the Tomisato area of the Sanbagawa belt (Central Shikoku, Japan).

*Ryosuke Oyanagi^1,2, Masaoki Uno³, Atsushi Okamoto³ (1. Kokushikan University, 2. Japan Agency for Marine-Earth Science and Technology, 3. Tohoku University)

10:15 AM - 10:30 AM

[T1-O-11] The significance of CASH-CO₂ metasomatism for tectonic slicing of subducting oceanic crust: an example from the Sanbagawa belt

*Shunsuke Endo¹, Nachi Kurihara¹, Tomoki Taguchi² (1. Shimane University, 2. Waseda University)

10:30 AM - 10:45 AM

[T1-O-12] Quantitative evaluation of silica and water transfer based on estimation of volume change of metamorphic rocks in Franciscan subduction zone

*Shogo Soejima¹, Simon Wallis¹ (1. The University of Tokyo)

10:45 AM - 11:00 AM

[T1-O-13] Intensity evaluation of of element transfer and its controlling parameters: Differences between Northwest and South Pacific oceanic plates.

*Satoshi Matsuno¹, Masaoki Uno¹, Atsushi Okamoto¹ (1. Graduate School of Environmental Studies Tohoku University)

11:00 AM - 11:15 AM

[T1-O-14] The δ¹³C– δ¹⁸O variations of eclogite-facies marble from the Eastern Iratsu body of the Sambagawa Belt: A Revisit

【ハイライト講演】

*Hironobu HARADA¹, Tatsuki TSUJIMORI^1,2, Hideko TAKAYANAGI¹, Yasufumi IRYU¹ (1. Department of Earth Science, Graduate School of Science, Tohoku University, 2. Center for Northeast Asian Studies, Tohoku University)

世話人よりハイライトの紹介：炭素同位体や酸素同位体分析は，炭酸塩の起源や地球内部の流体活動を知るための有用な手がかりである．講演者らは，エクロジャイト相変成作用を経験した大理石の炭素－酸素同位体分析を行い，(1)大理石が海洋性炭酸塩を起源とすること，(2)大規模な流体活動を受けた可能性を指摘している．地球内部における流体活動の貴重な情報交換の場となることが期待される．※ハイライトとは

11:15 AM - 11:30 AM

[T1-O-15] Re-estimation of the thermobaric structure of eclogite-facies bodies in the Sanbagawa metamorphic belt based on synchrotron micro-XANES spectroscopy

*Taisuke ITO¹, Simon R. WALLIS¹, Yoshio TAKAHASHI¹, Shunsuke ENDO², Toshihiro KOGURE¹, Yoshihiro ASAHARA³ (1. Department of Earth and Planetary Science, Faculty of Science, The University of Tokyo, 2. Department of Earth Science, Interdisciplinary Faculty of Science and Engineering, Shimane University, 3. Department of Earth and Environmental Sciences, Graduate School of Environmental Studies, Nagoya University)

11:30 AM - 11:45 AM

[T1-O-16] Peak metamorphic pressures of felsic granulite occurring in the Bohemian Massif, Czech Republic

【ハイライト講演】

*Mio Naito¹, Kensuke Yamane¹, Daisuke Nakamura¹, Takao Hirajima², Martin Svojtka³ (1. Okayama Univ. , 2. Kyoto Univ., 3. The Czech Academy of Sciences)

世話人よりハイライトの紹介：ヨーロッパ・ボヘミア地塊の高圧～超高圧変成帯に産する珪長質グラニュライトの温度圧力履歴に関する岩石学的研究である．超高圧変成帯には広域的に珪長質変成岩が分布し，超高圧条件を示すエクロジャイトの岩塊を含んで産出する．大陸地殻に由来すると考えられる珪長質変成岩が，どこまで沈み込み，上昇してきたかを明らかにした本研究は，地殻物質の挙動を考えるうえで重要なデータとなると考えられる．※ハイライトとは

11:45 AM - 12:00 PM

[T1-O-17] Automation of peak-fitting procedure for estimating the experienced temperature from Raman spectra of carbonaceous material

*Shunya Kaneki¹, Yui Kouketsu² (1. Kyoto University, DPRI, 2. Nagoya University, Graduate School of Environmental Studies)

Session information

[2oral301-13] T1.［Topic Session］Metamorphic rocks and tectonics

[T1-O-5] Nature of the plate boundary domain at the depth of deep slow earthquakes: evidence from the Sanbagawa belt

【ハイライト講演】

[T1-O-6] Influence of pore fluid pressure on fracture pattern of mantle wedge serpentinites

[T1-O-7] Naturally injected short-lived fluid flow in a single fracture related to seismic events in the middle crust.

[T1-O-8] Transient fluid migration recorded in antigorite veins formed by subduction-related fluids

[T1-O-9] Various metasomatism of a mantle wedge by slab-derived materials: Examination of serpentinites in the Kamuikotan metamorphic belt, Hokkaido, Japan

[T1-O-10] Metasomatism and mass transfer at the slab-mantle interface in the subduction zone: Insights from serpentinite in the Tomisato area of the Sanbagawa belt (Central Shikoku, Japan).

[T1-O-11] The significance of CASH-CO₂ metasomatism for tectonic slicing of subducting oceanic crust: an example from the Sanbagawa belt

[T1-O-12] Quantitative evaluation of silica and water transfer based on estimation of volume change of metamorphic rocks in Franciscan subduction zone

[T1-O-13] Intensity evaluation of of element transfer and its controlling parameters: Differences between Northwest and South Pacific oceanic plates.

[T1-O-14] The δ¹³C– δ¹⁸O variations of eclogite-facies marble from the Eastern Iratsu body of the Sambagawa Belt: A Revisit

【ハイライト講演】

[T1-O-15] Re-estimation of the thermobaric structure of eclogite-facies bodies in the Sanbagawa metamorphic belt based on synchrotron micro-XANES spectroscopy

[T1-O-16] Peak metamorphic pressures of felsic granulite occurring in the Bohemian Massif, Czech Republic

【ハイライト講演】

[T1-O-17] Automation of peak-fitting procedure for estimating the experienced temperature from Raman spectra of carbonaceous material

Authentication