The 133rd Annual Meeting of the Geological Society of Japan
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Session OralT4[Topic] Metamorphic rocks and tectonicsEDI: Equality, Diversity, Inclusion

T4[Topic] Metamorphic rocks and tectonics

Mon. Sep 14, 2026 3:00 PM - 5:45 PM JST
Mon. Sep 14, 2026 6:00 AM - 8:45 AM UTC
oral room 2(AV lecture room)
Chiar:Yuki MORI, Ippei KITANO, Ryosuke OYANAGI
3:00 PM - 3:15 PM JST(6:00 AM - 6:15 AM UTC)

[T4-O-10]Prolonged metamorphism or polymetamorphism? - Petrochronological analysis of prograde metamorphism in high-temperature metamorphic rocks from a collision zone

*Tetsuo Kawakami1, Kengo Ito2, Sota Niki3, Masayasu Suzuki1, Shuhei Sakata4, Fumiko Higashino1, Tatsuro Adachi5, Masaoki Uno4, Takafumi Hirata4 (1. Kyoto University, 2. Osaka University, 3. Nagoya University, 4. The University of Tokyo, 5. Kyushu University)
Comment()
3:15 PM - 3:30 PM JST(6:15 AM - 6:30 AM UTC)entryECS: Early Career Scientist

[T4-O-11]Origin and Triassic partial melting of mafic rocks in the Oki metamorphic rocks

*Mizuki Takahashi1, Shunsuke Endo1, Atsushi Kamei1, Kenji Horie2, Mami Takehara2, Yoshihiro Asahara3, Yusuke Shimura3 (1. Shimane Univ., 2. National Institute of Polar Research, 3. Nagoya Univ.)
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3:30 PM - 3:45 PM JST(6:30 AM - 6:45 AM UTC)

[T4-O-12]Muscovite forming in an environment with high ambient argon concentrations during Abukuma low P/T type of metamorphism, NE Japan

*Tetsumaru Itaya1 (1. Hiruzen Institute for Geology & Chronology)
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3:45 PM - 4:00 PM JST(6:45 AM - 7:00 AM UTC)

[T4-O-13]Amplification of textural heterogeneity due to Ostwald ripening (OR) and Growth Rate Dispersion (GRD)

*Kazuhiro Miyazaki1 (1. Geological Survey of Japan, AIST)
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4:00 PM - 4:15 PM JST(7:00 AM - 7:15 AM UTC)entryECS: Early Career Scientist

[T4-O-14]Role of earthquakes and fluid-assisted processes in deforming the lower crust: Evidence from the Napier Complex, East Antarctica

*Ryo MURAYAMA1, Lakshmanan SREEHARI1, Yoshihiro NAKAMURA2 (1. Shimane Univ, 2. AIST)
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4:15 PM - 4:30 PM JST(7:15 AM - 7:30 AM UTC)

Break

4:30 PM - 5:00 PM JST(7:30 AM - 8:00 AM UTC)

[T4-O-15](Invited) Metamorphic dehydration process in subduction zones and slow-fast earthquakes

*So Ozawa1 (1. Earthquake Research Institute, University of Tokyo)
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5:00 PM - 5:15 PM JST(8:00 AM - 8:15 AM UTC)entry

[T4-O-16]Strain analysis from platy minerals in severely deformed Hitotsunashi conglomerate schist

*Renya SUZUKI1, Miki TASAKA1, Toshiaki MASUDA1, Kenji KUSUNKI1 (1. Shizuoka Univ.)
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5:15 PM - 5:30 PM JST(8:15 AM - 8:30 AM UTC)

[T4-O-17]Visualization of lineation switch and foliation switch during progressive three-dimensional deformation with simultaneous simple shear and 3D coaxial components

*Toshiaki MASUDA1, Miki TASAKA1, Yumie TANIGUCHI2, Megumi KURASHINA3, Kenji KUSUNOKI1, Renya SUZUKI1, Ryota OTAKE1 (1. Shizuoka University, 2. Shimizu-Higashi High School, 3. Kanagawa Prefectural Musium of Natural History)
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5:30 PM - 5:45 PM JST(8:30 AM - 8:45 AM UTC)

[T4-O-18]Geological Powder Flow and Spherule Aggregate

*Mitsuhiro TORIUMI1 (1. Japan Agency for Marine-Earth Science and Technology)
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