Oral Session

C-3: Roles of Fluids for Reaction Kinetics, Time Scale and Deformation of Crust and Mantle.

Mon. Aug 21, 2023 3:00 PM - 5:00 PM ROOM1 (Exhibition Hall 1-A)

Chairman:Tatsuki Tsujimori(Tohoku University)、Masaoki Uno(Tohoku University)

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3:00 PM - 3:15 PM

[OC3-01] Water in deformed quartz: Changes in contents and distributions by development of dynamic recrystallization

*Junichi Fukuda¹, Takamoto Okudaira¹, Yukiko Ohtomo² (1. Osaka Metrop. Univ. (Japan), 2. Yamagata Univ. (Japan))

3:15 PM - 3:30 PM

[OC3-02] Physical conditions of magmatic-hydrothermal fracturing in deep crust: Records of subvolcanic deep low frequency earthquakes?

*Masaoki Uno¹, Takumi Nara¹, Diana Mindaleva¹, Tetsuo Kawakami², Tatsuro Adachi³, Fumiko Higashino², Noriyoshi Tsuchiya¹ (1. Tohoku University (Japan), 2. Kyoto University (Japan), 3. Kyushu University (Japan))

3:30 PM - 3:45 PM

[OC3-03] Formation of columnar antiphase domains in omphacite from low-temperature eclogites: A modeling study

*Ryo Fukushima¹, Tatsuki Tsujimori¹, Nobuyoshi Miyajima² (1. Tohoku University (Japan), 2. Bayerisches Geoinstitut, Universität Bayreuth (Germany))

3:45 PM - 4:00 PM

[OC3-04] Decoding fluid-related processes in the Sambagawa Metamorphic Rocks through phengite geochemistry

*Hironobu Harada¹, Tatsuki Tsujimori¹, Maureen D. Feineman², Kazumasa Aoki³, Daniel Pastor-Galán^4,1, Antonio M. Álvarez-Valero⁵, Tetsumaru Itaya⁶ (1. Tohoku University (Japan), 2. Pennsylvania State University (United States of America), 3. Okayama University of Science (Japan), 4. University of Granada (Spain), 5. University of Salamanca (Spain), 6. Japan Geochronology Network (Japan))

Coffee break (4:00 PM - 4:15 PM)

4:15 PM - 4:30 PM

[OC3-05] Multi-stage Fluid Infiltration into Mantle Wedge in a Subduction Zone: An Example from the Chandman Meta-peridotite, Western Mongolia

*Otgonbayar Dandar¹, Atsushi Okamoto¹, Masaoki Uno¹, Noriyoshi Tsuchiya¹ (1. Tohoku university (Japan))

4:30 PM - 4:45 PM

[OC3-06] A systematic link between the mantle wedge and subduction slab: Evidence revealed through metamorphic rocks in the Urgamal area, Western Mongolia

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*Manzshir Bayarbold^1,2, Atsushi Okamoto¹, Masaoki Uno¹, Otgonbayar Dandar^1,2, Noriyoshi Tsuchiya¹ (1. Graduate School of Environmental Studies, Tohoku University (Japan), 2. Geoscience Center, Mongolian University of Science and Technology, Ulaanbaatar (Mongolia))

4:45 PM - 5:00 PM

[OC3-07] Characterizing Na-Al-rich metasomatic rocks in a forearc serpentinite complex: Geochemical and geochronological perspectives from the Itoigawa–Omi area, Hida Mountains, Japan

*Tatsuki Tsujimori¹, Tomomi Hara¹, Shogo Aoki², Kazumasa Aoki³, Yasuhito Osanai⁴, Jun-ichi Kimura⁵, Hiroshi Miyajima⁶ (1. Tohoku Univ. (Japan), 2. Akita Univ. (Japan), 3. Okayama Univ. of Science (Japan), 4. Kyushu Univ. (Japan), 5. JAMSTEC (Japan), 6. Fossa Magna Museum (Japan))

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