The 132nd Annual Meeting of the Geological Society of Japan
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Session OralT5 ［Topic Session］Subduction zones and on-land accretionary complexes+F7:F8

[3oral201-13]T5. Subduction zones and on-land accretionary complexes+F7:F8

Tue. Sep 16, 2025 8:45 AM - 12:30 PM JST
Tue. Sep 16, 2025 11:45 PM - 3:30 AM UTC
oral room 2(E107)
Chiar:Hanaya OKUDA(Japan Agency for Marine-Earth Science and Technology), Hinako HOSONO(Geological Survey of Japan, AIST), Takahiro HOSOKAWA(Kochi University)
8:45 AM - 9:15 AM JST(11:45 PM - 12:15 AM UTC)

[T5-O-1][Invited] Preliminary Results of IODP Expedition 405 JTRACK

*Kohtaro Ujiie1, Shuichi Kodaira2, Marianne Conin3, Patrick Fulton4, Jamie Kirkpatrick5, Christine Regalla6, Natsumi Okutsu2, Rena Maeda2, Sean Toczko2, Nobuhisa Eguchi2, IODP Expedition 405 Scientists (1. University of Tsukuba, 2. JAMSTEC, 3. University of Lorraine, 4. Cornell University, 5. University of Nevada, Reno, 6. Northern Arizona University)
9:15 AM - 9:30 AM JST(12:15 AM - 12:30 AM UTC)entryECS

[T5-O-2]Radiolarian biostratigraphy at IODP Expedition 405 JTRACK drilled sites: about the frontal prism and the subducting oceanic plate near the Japan Trench.

*Minori HAGINO1, Masao IWAI2, Marianne CONIN3, Patrick FULTON4, Jamie KIRKPATRICK5, Shuichi KODAIRA6, Christine REGALLA7, Kohtaro UJIIE8, Nobu EGUCHI6, Lena MAEDA6, Natsumi OKUTSU6, Sean TOCZKO6, IODP Exp.405 Science Party (1. Graduate School of Science and Engineering, Yamagata University, 2. KCC/MaCRI, Kochi University, 3. University of Lorraine, 4. Cornell University, 5. University of Nevada, Reno, 6. JAMSTEC, 7. Northern Arizona University, 8. University of Tsukuba)
9:30 AM - 9:45 AM JST(12:30 AM - 12:45 AM UTC)

[T5-O-3]Diatom biostratigraphy at IODP Exp. 405JTRACK drilled sites: implicaiton to the frontal prism structure near the Japan Trench.

*Masao Iwai1, Minori Hagino2, IODP Exp.405 Science Party3 (1. MaCRI, Kochi University, 2. Yamagata University, 3. https://www.jamstec.go.jp/chikyu/e/exp405/crew_all.html)
9:45 AM - 10:00 AM JST(12:45 AM - 1:00 AM UTC)

[T5-O-4]Lithological Characteristics of Chert and Basalt subducting the Japan Trench sampled during the IODP Expedition 405

*Asuka YAMAGUCHI1, Piero Bellanova2, Morgane Brunet3, Yu-Chun Chang4, Charlotte Pizer5, Rina Fukuchi6, Amy Gough7, Uisdean Nicholson7, Hanaya Okuda4, Marianne Conin8, Jamie Kirkpatrick9, Shuichi Kodaira4, Patrick Fulton10, Christine Regalla11, Kohtaro Ujiie12, Lena Maeda4, Natsumi Okutsu4, Scientists IODP Expedition 405 (1. Atmosphere and Ocean Research Institute, the University of Tokyo, 2. RWTH Aachen Univ., 3. IFREMER, 4. JAMSTEC, 5. Univ. Innsbruck, 6. Naruto University of Education, 7. Heriot-Watt Univ., 8. Univ. Lorraine, 9. Univ. Nevada, Reno, 10. Cornell Univ., 11. Northern Arizona Univ., 12. University of Tsukuba)
10:00 AM - 10:15 AM JST(1:00 AM - 1:15 AM UTC)

[T5-O-5]Investigating Fault Zone Healing Post-Megathrust Earthquake:
Hydraulic Property Comparison from JFAST and JTRACK Borehole Data

*Hinako HOSONO1,2, Yohei Hamada3, Hanaya Okuda3, Makoto Otsubo1, Wataru Tanikawa3, Takehiro Hirose3,2, Marianne Conin4, Patrick Fulton5, Jamie Kirkpatrick6, Shuichi Kodaira3, Christine Regalla7, Kohtaro Ujiie8, Nobuhisa Eguchi3, Lena Maeda3, Natsumi Okutsu3, Toczko Sean3 (1. Geological Survey of Japan, AIST, 2. Hiroshima Univ., 3. JAMSTEC, 4. Univ. Lorraine, 5. Conell Univ., 6. Univ. Nevada, 7. Northern Arizona Univ., 8. Tsukuba Univ.)
10:15 AM - 10:30 AM JST(1:15 AM - 1:30 AM UTC)entryECS

[T5-O-6]Dynamic fluid-rock interactions during the seismic cycle from microstructural observations: Minami-Awa fault of the Mugi mélange in the Cretaceous Shimanto Belt

*Takahiro HOSOKAWA1, Yoshitaka HASHIMOTO1, Rüdiger KILIAN2, Michael STIPP2 (1. Kochi University, 2. Martin Luther University Halle-Wittenberg)
10:30 AM - 10:45 AM JST(1:30 AM - 1:45 AM UTC)entryECS

[T5-O-7]Deformation of Plate Boundary Associated with Seamount Subduction and Accretion: A Case Study at Funafuseyama Unit, Mino Belt

*Fuka Takuwa1, Asuka Yamaguchi1, Makoto Otsubo2, Yusuke Shimura2, Hanaya Okuda3 (1. Atmosphere and Ocean Research Institute, The University of Tokyo, 2. Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology, 3. Japan Agency for Marine-Earth Science and Technology)
10:45 AM - 11:00 AM JST(1:45 AM - 2:00 AM UTC)

[3oral201-13-8add]Break

11:00 AM - 11:15 AM JST(2:00 AM - 2:15 AM UTC)

[T5-O-8]Scaling and Spatiotemporal Evolution of Stress and Strain Governed by Heterogeneous Material Geometry

*Yoshitaka Hashimoto1 (1. Kochi University)
11:15 AM - 11:30 AM JST(2:15 AM - 2:30 AM UTC)entry

[T5-O-9]Elastic structure of the crust in subduction zones and its effect on seismogenic zones

*Shinichiro TAKA1, Yohei HAMADA2, Hanaya OKUDA2, Yoshihiko TAMURA2, Arito SAKAGUCHI1 (1. Yamaguchi University Guraduate School of Science and Technology for Innovation, 2. Japan Agency for Marin-Earth Science and Technology)
11:30 AM - 11:45 AM JST(2:30 AM - 2:45 AM UTC)ECS

[T5-O-10]Elastic properties of rocks in the seismogenic zone: upscaling and implication for earthquake nucleation

*Hanaya OKUDA1, Yuya AKAMATSU1, Manami KITAMURA2, Michiyo SAWAI3 (1. Japan Agency for Marine-Earth Science and Technology, 2. Geological Survey of Japan, 3. Chiba University)
11:45 AM - 12:00 PM JST(2:45 AM - 3:00 AM UTC)

[T5-O-11]Reduction of total sulfur and their whereabout associated with short-duration heating along faults

*Yuzuru YAMAMOTO1, Yuino KOBAYASHI1, Mayuko FUKUYAMA2, Stephen Allan BOWDEN3, Yohei HAMADA4, Takumi Mimura2, Shun CHIYONOBU2 (1. Kobe University, 2. Akita University, 3. University of Aberdeen, 4. JAMSTEC)
12:00 PM - 12:15 PM JST(3:00 AM - 3:15 AM UTC)

[T5-O-12]Neotectonics of the outer ridge off Shikoku, SW Japan

*Juichiro ASHI1, Konosuke TERUI2 (1. UTokyo, 2. ENEOS Xplora)
12:15 PM - 12:30 PM JST(3:15 AM - 3:30 AM UTC)

[T5-O-13]Morphological and geothermal features in Hyuga-Nada -Preliminery report of the KS-21-08 and KS-25-03 cruises-

*Masa KINOSHITA1, Tomohiro Toki2, Yoshitaka Hashimoto3, Yohei Hamada4, Science Party KS-21-081, Science Party KS-25-31 (1. Earthquake Research Institute, the University of Tokyo, 2. University of Ryukyus, 3. Kochi University, 4. JAMSTEC)
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