Sun. May 25, 2025 3:30 PM - 5:00 PM Exhibition Hall Special Setting (3) (Exhibition Hall 7&8, Makuhari Messe)

[J] Oral
| O (Public )
| Public

[O-01] Earth and Planetary Science Top Seminar

convener:Yasuhito Sekine(Earth-Life Science Insitute, Tokyo Institute of Technology), Atsushi Okamoto(Graduate School of Environmental Studies), Kazuhisa Goto(Department of Earth and Planetary Science, The University of Tokyo), Tatsuhiko Hara(International Institute of Seismology and Earthquake Engineering, Building Research Institute), Chairperson:Yasuhito Sekine(Earth-Life Science Insitute, Tokyo Institute of Technology), Kazuhisa Goto(Department of Earth and Planetary Science, The University of Tokyo), Tatsuhiko Hara(International Institute of Seismology and Earthquake Engineering, Building Research Institute), Atsushi Okamoto(Graduate School of Environmental Studies)

Fri. May 30, 2025 9:00 AM - 10:30 AM 105 (International Conference Hall, Makuhari Messe)

[J] Oral
| S (Solid Earth Sciences )
| S-CG Complex & General

[S-CG54] New Insights of Fluid-Rock Interactions: From Surface to Deep Subduction Zone

convener:Atsushi Okamoto(Graduate School of Environmental Studies), Jun Muto(Department of Earth Sciences, Tohoku University), Ikuo Katayama(Department of Earth and Planetary Systems Science, Hiroshima University), Junichi Nakajima(Department of Earth and Planetary Sciences, Institute of Science Tokyo), Chairperson:Kazuki Yoshida(High Energy Accelerator Research Organization), Koki Aida(The University of Tokyo)

Fri. May 30, 2025 10:45 AM - 12:15 PM 105 (International Conference Hall, Makuhari Messe)

[J] Oral
| S (Solid Earth Sciences )
| S-CG Complex & General

[S-CG54] New Insights of Fluid-Rock Interactions: From Surface to Deep Subduction Zone

convener:Atsushi Okamoto(Graduate School of Environmental Studies), Jun Muto(Department of Earth Sciences, Tohoku University), Ikuo Katayama(Department of Earth and Planetary Systems Science, Hiroshima University), Junichi Nakajima(Department of Earth and Planetary Sciences, Institute of Science Tokyo), Chairperson:Miho Furukawa(Department of Earth Science, Tohoku University), Ken-ichi Hirauchi(Department of Geosciences, Faculty of Science, Shizuoka University)

Fri. May 30, 2025 1:45 PM - 3:15 PM 105 (International Conference Hall, Makuhari Messe)

[J] Oral
| S (Solid Earth Sciences )
| S-CG Complex & General

[S-CG54] New Insights of Fluid-Rock Interactions: From Surface to Deep Subduction Zone

convener:Atsushi Okamoto(Graduate School of Environmental Studies), Jun Muto(Department of Earth Sciences, Tohoku University), Ikuo Katayama(Department of Earth and Planetary Systems Science, Hiroshima University), Junichi Nakajima(Department of Earth and Planetary Sciences, Institute of Science Tokyo), Chairperson:Kazuki Miyazaki(Department of Earth and Planetary Sciences, Tokyo Institute of Technology), Kohei Hatakeyama(Faculty of Education, Meisei University)

Fri. May 30, 2025 5:15 PM - 7:15 PM Poster Hall (Exhibition Hall 7&8, Makuhari Messe)

[J] Poster
| S (Solid Earth Sciences )
| S-CG Complex & General

[S-CG54] New Insights of Fluid-Rock Interactions: From Surface to Deep Subduction Zone

convener:Atsushi Okamoto(Graduate School of Environmental Studies), Jun Muto(Department of Earth Sciences, Tohoku University), Ikuo Katayama(Department of Earth and Planetary Systems Science, Hiroshima University), Junichi Nakajima(Department of Earth and Planetary Sciences, Institute of Science Tokyo)

Tue. May 27, 2025 9:00 AM - 10:30 AM 103 (International Conference Hall, Makuhari Messe)

[J] Oral
| H (Human Geosciences )
| H-SC Social Earth Sciences & Civil/Urban System Sciences

[H-SC06] CCUS (Carbon Dioxide Capture, Utilization, and Storage) for Climate Mitigation

9:30 AM - 9:45 AM

[HSC06-03] Experimental constraints on carbonate precipitation during andesite-CO₂-dissolved water interaction

*Jion Kubota¹, OTGONBAYAR DANDAR¹, Tomohito Kameda¹, Masaoki Uno¹, Atsushi Okamoto¹ (1.Tohoku University )

Fri. May 30, 2025 1:45 PM - 3:15 PM Exhibition Hall Special Setting (3) (Exhibition Hall 7&8, Makuhari Messe)

[J] Oral
| S (Solid Earth Sciences )
| S-SS Seismology

[S-SS10] Fault Rheology and Earthquake Physics

2:45 PM - 3:00 PM

[SSS10-21] ICDP DSeis Project: Spatial variation of seismic wave velocity and alteration of ultramafic dike recovered from a seismogenic zone 3 km below the ground surface

*kaoru fujita¹, Hiroshi Ogasawara², Yasuo Yabe³, Masaki Kanao⁴, Jun'ichi Okuno⁴, Atsushi Okamoto³, Shunya Okino³, hamagaki takaya², Yoshitaka Hashimoto⁵, Akira Tsuchiyama², Yuhji Yamamoto⁵ (1.The Graduate University for Advanced Studies, 2.Ritsumeikan University, 3.Tohoku University, 4.National Institute of Polar Research, 5.Kochi University)

Tue. May 27, 2025 10:45 AM - 12:15 PM 201B (International Conference Hall, Makuhari Messe)

[J] Oral
| S (Solid Earth Sciences )
| S-MP Mineralogy & Petrology

[S-MP28] Deformed rocks, Metamorphic rocks and Tectonics

10:45 AM - 11:00 AM

[SMP28-07] Hydrothermal Alteration of Lower Crust: Plagioclase Replacement by Epidote in Khantaishir ophiolite, Western Mongolia

*OTGONBAYAR DANDAR¹, Atsushi Okamoto¹, Masaoki Uno¹, Noriyoshi Tsuchiya^1,2 (1.Graduate School of Environmental Studies, Tohoku University, 2.National Institute of Technology, Hachinohe College)

Tue. May 27, 2025 5:15 PM - 7:15 PM Poster Hall (Exhibition Hall 7&8, Makuhari Messe)

[J] Poster
| S (Solid Earth Sciences )
| S-MP Mineralogy & Petrology

[S-MP28] Deformed rocks, Metamorphic rocks and Tectonics

5:15 PM - 7:15 PM

[SMP28-P15] Visualization of features and spatial patterns of retrograde metamorphism in metamorphic rocks using XRD: example of the East Iratsu body of the Sanbagawa metamorphic belt.

*Ryoga Tanabe¹, Matsuno Satoshi¹, OTGONBAYAR DANDAR¹, Keiichi Osaka², Masaoki Uno¹, Atsushi Okamoto¹ (1.Tohoku University Graduate School of Environmental Studies, 2.Japan Synchrotron Radiation Research Institute)

Sun. May 25, 2025 5:15 PM - 7:15 PM Poster Hall (Exhibition Hall 7&8, Makuhari Messe)

[J] Poster
| S (Solid Earth Sciences )
| S-VC Volcanology

[S-VC35] Hydrothermal systems of volcanoes

5:15 PM - 7:15 PM

[SVC35-P03] Development of a numerical simulator for non-isothermal multiphase fluid flow with silica reactive transport processes in magmatic hydrothermal systems

*Norihiro Watanabe¹, Yasuo Matsunaga¹, Atsushi Okamoto², Noriyoshi Tsuchiya², Masaoki Uno², Takashi Akatsuka³, Tatsuya Kajiwara³, Hanae Saishu¹, Takuya Ishibashi¹, Yusuke Yamaya¹, Hiroshi Asanuma¹ (1.National Institute of Advanced Industrial Science and Technology, 2.Graduate School of Environmental Studies, Tohoku University, 3.Geothermal Engineering Co., Ltd.)

Tue. May 27, 2025 3:30 PM - 5:00 PM International Conference Room (IC) (International Conference Hall, Makuhari Messe)

[E] Oral
| S (Solid Earth Sciences )
| S-CG Complex & General

[S-CG45] Science of slow-to-fast earthquakes

4:45 PM - 5:00 PM

[SCG45-36] Weakening of forearc mantle wedge at the subduction interface in a warm subduction zone: Insights from the phase equilibria modeling on the fluid-rock reaction

*Ryosuke Oyanagi^1,2, Atsushi Okamoto³ (1.Kokushikan University, 2.JAMSTEC, 3.Tohoku University)

Wed. May 28, 2025 1:45 PM - 3:15 PM International Conference Room (IC) (International Conference Hall, Makuhari Messe)

[E] Oral
| S (Solid Earth Sciences )
| S-CG Complex & General

[S-CG45] Science of slow-to-fast earthquakes

2:45 PM - 3:00 PM

[SCG45-53] Pressure oscillations caused by silica precipitation during fluid flow in a granite fracture

*Atsushi Okamoto¹, Edward L. Vinis¹, Hataka Nishimura¹ (1.Graduate School of Environmental Studies)

Wed. May 28, 2025 5:15 PM - 7:15 PM Poster Hall (Exhibition Hall 7&8, Makuhari Messe)

[E] Poster
| S (Solid Earth Sciences )
| S-CG Complex & General

[S-CG45] Science of slow-to-fast earthquakes

5:15 PM - 7:15 PM

[SCG45-P12] The time-dependent contrasting slip behavior induced by H₂O-CO₂ fluid within slab-mantle interface and implication to slow earthquakes at shallow mantle wedge

*Shunya Okino¹, Atsushi Okamoto¹, Ryosuke Oyanagi^3,4, Yukiko Kita², Sando Sawa², Jun Muto² (1.Graduate School of Environmental Studies, Tohoku University, 2.Department of Earth Science, Graduate School of Science, Tohoku University, 3.School of Science and Engineering, Kokushikan University, 4.Research Institute for Marine Geodynamics, Japan Agency for Marine–Earth Science and Technology)

5:15 PM - 7:15 PM

[SCG45-P13] Experimental representation of crack-sealing, silica vein formation, and permeability evolution induced by fluid pressure drop at seismogenic depths

*Ryoto Toda¹, Masaoki Uno¹, Atsushi Okamoto¹ (1.Graduate School of Environmental Studies, TOHOKU University)

5:15 PM - 7:15 PM

[SCG45-P14] Silica-sealing zone at the base of seismogenic zone revealed by geochemical machine-learning of pelitic schists

*Taito Amari¹, Masaoki Uno¹, Matsuno Satoshi¹, Atsushi Okamoto¹ (1.Tohoku University Graduate School of Environmental Studies)

Wed. May 28, 2025 1:45 PM - 3:15 PM 201A (International Conference Hall, Makuhari Messe)

[J] Oral
| S (Solid Earth Sciences )
| S-CG Complex & General

[S-CG53] Petrology, Mineralogy & Resource Geology

1:45 PM - 2:00 PM

[SCG53-01] Mineral replacement of sulfide minerals and its impact one thermoelectric conversion at seafloor hydrothermal vents

*Kentaro Toda¹, Atsushi Okamoto¹, DANDAR OTOGONBAYAR¹, Misaki Takahashi¹, Yoshinori Sato¹, Tomonori Ihara², Tatsuo Nozaki³ (1.Graduate School of Environmental Studies, TOHOKU University, 2.Tokyo University of Marine Science and Technology, 3.Waseda University)

Fri. May 30, 2025 9:00 AM - 10:30 AM 105 (International Conference Hall, Makuhari Messe)

[J] Oral
| S (Solid Earth Sciences )
| S-CG Complex & General

[S-CG54] New Insights of Fluid-Rock Interactions: From Surface to Deep Subduction Zone

9:30 AM - 9:45 AM

[SCG54-03] Fracture-induced carbonation and metasomatism of the Higuchi serpentinite body in the Sanbagawa belt, Kanto Mountains, Japan

*Ken-ichi Hirauchi¹, Mei Taira¹, Yuki Wakamatsu¹, Makoto Otsubo², Atsushi Okamoto³ (1.Department of Geosciences, Faculty of Science, Shizuoka University, 2.Geological Survey of Japan, Research Institute of Earthquake and Volcano Geology, 3.Graduate School of Environmental Studies)

Fri. May 30, 2025 10:45 AM - 12:15 PM 105 (International Conference Hall, Makuhari Messe)

[J] Oral
| S (Solid Earth Sciences )
| S-CG Complex & General

[S-CG54] New Insights of Fluid-Rock Interactions: From Surface to Deep Subduction Zone

11:00 AM - 11:15 AM

[SCG54-08] Element transport and the breakdown of magnetite during alteration of a gabbroic vein at the crust-mantle transition zone, the Bayankhongor Ophiolite, Mongolia.

*Nomin Tumurkhuu¹, OTGONBAYAR DANDAR¹, Masaoki Uno¹, Manzshir Bayarbold¹, Kazuki Yoshida², Yasuhiro Niwa^2,3, Masao Kimura^2,3, Atsushi Okamoto¹ (1.Graduate School of Environmental Studies, Tohoku University, 2.High Energy Accelerator Research Organization (KEK), 3.Graduate University for Advanced Studies)

11:15 AM - 11:30 AM

[SCG54-09] Contrasting evolution of the hydrogen generation between the lower crust gabbroic rocks and the mantle peridotite serpentinization

*Kazuki Yoshida¹, Atsushi Okamoto², Ryosuke Oyanagi^3,4, Masakazu Fujii^5,6, Kenta K. Yoshida⁴, Yasuhiro Niwa^1,6, Yasuo Takeichi⁷, Masao Kimura^1,6 (1.High Energy Accelerator Research Organization, 2.Tohoku University, 3.Kokushikan University, 4.Japan Agency for Marine-Earth Science and Technology, 5.National Institute of Polar Research, 6.The Graduate University for Advanced Studies, 7.Osaka University)

11:30 AM - 11:45 AM

[SCG54-10] Permeability enhancement in fractured peridotite with chelating agents

*Luis Salala^1,2, Noriaki Watanabe¹, Jiajie Wang¹, Atsushi Okamoto¹ (1.Graduate Schoool of Environmental Studies, Tohoku University, 2.Faculty of Engineering and Architecture, University of El Salvador)

Fri. May 30, 2025 5:15 PM - 7:15 PM Poster Hall (Exhibition Hall 7&8, Makuhari Messe)

[J] Poster
| S (Solid Earth Sciences )
| S-CG Complex & General

[S-CG54] New Insights of Fluid-Rock Interactions: From Surface to Deep Subduction Zone

5:15 PM - 7:15 PM

[SCG54-P01] Self-induced Differential Stress and Reaction-induced Fracturing in Hydration of Periclase: Insights from Real-time measuring Experiments

*Fukuma Sakashita¹, Atsushi Okamoto¹, Kazuki Yoshida², OTGONBAYAR DANDAR¹, Masaoki Uno¹ (1.Tohoku University, 2.High Energy Accelerator Research Organization)

5:15 PM - 7:15 PM

[SCG54-P03] Depth direction Super-resolution Framework for Rock CT Images Based on Deep Learning

*Ryogo Kagawa¹, Atsushi Okamoto², Toshiaki Omori¹ (1.Kobe University, 2.Tohoku University)

5:15 PM - 7:15 PM

[SCG54-P08] Mineral replacement and Element transfer during alteration of oceanic lower crust: Insights from flow-through hydrothermal experiments using gabbro and brines

*Kohei Suzuki¹, OTGONBAYAR DANDAR¹, Atsushi Okamoto¹ (1.Tohoku University Graduate School of Environmental Studies)

5:15 PM - 7:15 PM

[SCG54-P14] Development of CL Zoning Structure in Artificial Quartz Veins thorough Fluid Pressure Fluctuation Experiments

*Nishimura Hataka¹, Atsushi Okamoto¹, Astin Nurdiana¹, Kenta Yoshida² (1.Tohoku university Graduate School of Environmental Studies, 2.JAMSTEC)

Wed. May 28, 2025 3:30 PM - 5:00 PM 103 (International Conference Hall, Makuhari Messe)

[J] Oral
| S (Solid Earth Sciences )
| S-CG Complex & General

[S-CG61] Dynamics in mobile belts

3:30 PM - 3:45 PM

[SCG61-07] Relative significance of Si-, Mg- and CO₂-metasomatism at shallow mantle wedge

★Invited Papers

*Atsushi Okamoto¹, Ryosuke Oyanagi², Shunya Okino¹ (1.Tohoku Univ., 2.Kokushikan Univ.)

Atsushi Okamoto

Convener, Chairperson

Speaker, Author, Co-Author

★Invited Papers