[3oral106-11] T5［Topic Session］Tectonics

Tue. Sep 19, 2023 10:15 AM - 12:00 PM oral room 1 (4-11, Yoshida-South Campus Bldg. No 4)

Chiar:Toshiki HAJI, Satoshi Tonai(Kochi Univ.)

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10:15 AM - 10:45 AM

[T5-O-1] [Invited] Miocene crustal deformation in and around the Izu collision zone

【ハイライト講演】

*Hiroyuki Hoshi¹ (1. Aichi University of Education)

世話人よりハイライトの紹介：本講演では，伊豆衝突帯周辺から最近得られた年代測定結果や古地磁気測定結果の概要も交えて，伊豆衝突帯周辺の地殻変形とテクトニック・モデルについて議論する．※ハイライトとは

10:45 AM - 11:00 AM

[T5-O-2] Does a hairpin turn exist in the Cretaceous apparent polar wander path of southwest Japan?

*Koji Uno^1,2, Honoka Ohara², Kuniyuki Furukawa³, Tatsuo Kanamaru⁴ (1. University of Hyogo, 2. Okayama University, 3. Aichi University, 4. Nihon University)

11:00 AM - 11:15 AM

[T5-O-3] (entry) Formation process and depositional age of chaotic beds in the Paleogene Muroto Formation at Muroto Peninsula, Kochi Prefecture, Japan

*【ECS】Hinako MATSUMOTO¹, Satoshi TONAI², Hidetoshi HARA³ (1. Faculty of Science and Technology Kochi University Graduate School, 2. Faculty of Science and Technology Kochi University, 3. Institute of Geology and Geoinformation, Geological Survey of Japan, AIST)

11:15 AM - 11:30 AM

[T5-O-4] Evolution in response to progressive Izanagi–Pacific ridge approach and subsequent subduction: Conglomerates in the accretionary complexes of the Shimanto Belt, Kii Peninsula and Shikoku

*Yusuke SHIMURA¹, Hidetoshi HARA¹, Tetsuya TOKIWA², Yoshihiro NAKAMURA¹, Yoshihiro ASAHARA³ (1. Geological Survey of Japan, AIST, 2. Shinshu University, 3. Nagoya University)

11:30 AM - 11:45 AM

[T5-O-5] (entry)Structural difference of the Cretaceous and Eocene groups in Amakusa: Early Paleogene surface tectonics of the SW Japan–Ryukyu forearc

★「日本地質学会学生優秀発表賞」受賞★

*【ECS】Kentaro Ushimaru¹, Atsushi Yamaji¹ (1. Division of Earth and Planetary Sciences, Graduate School of Science, Kyoto University)

11:45 AM - 12:00 PM

[T5-O-6] Zircon U-Pb ages of the Murotomisaki Gabbroic Intrusion and their implications for the middle Miocene southwestern Japan subduction margin

*Hironao Shinjoe¹, Toshiki HAJI², Sota NIKI³, Yuji ORIHASHI⁴, Minoru SASAKI⁴, Takafumi HIRATA³ (1. Tokyo Keizai University, 2. Geological Survey of Japan, AIST, 3. Geochemical Research Center, Graduate School of Science, The University of Tokyo, 4. Graduate School of Science and Technology, Hirosaki University)

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