[S-GL27] Geologic structure and tectonic history of East Asia and Japanese Islands

Tue. May 26, 2026 1:45 PM - 3:15 PM Exhibition Hall Special Setting (8) (Exhibition Hall 7&8, Makuhari Messe)

Chairperson:Haji Toshiki(Geological Survey of Japan, AIST)

The main aim of this session is to discuss geologic structure and tectonic history of East Asia, especially of Japanese Islands, on the basis of the recent results of geology and other earth sciences.

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1:45 PM - 2:00 PM

[SGL27-01] Late Permian to Jurassic accretionary growth history along the East Asian margin revealed by multi-proxy detrital zircon analyses of the Ultra-Tamba and Tamba belts, SW Japan

*Keigo Adachi¹, Shogo Aoki¹, Mayuko Fukuyama² (1. Graduate School of International Resource Sciences, Akita University, 2. Graduate school of Engineering Science, Akita University)

2:00 PM - 2:15 PM

[SGL27-02] The geologic structure of the Nappe boundary fault of the Akiyoshi complex in Northern Kyushu, Japan.

*Yuta Ichizawa¹, Takumi Shimomatsu², Arito Sakaguchi¹, Mari Hamahashi¹, Qing Chang³, Yuuki Hagiwara³ (1. Graduate School of Sciences and Technology for Innovation, Yamaguchi University, 2. Chuo Kaihatsu Corporation, 3. Japan Agency for Marine-Earth Science and Technology)

2:15 PM - 2:30 PM

[SGL27-03] Miocene paleomagnetic directions of the Shimokita Peninsula and the tectonic rotation of Northeast Japan

*Hiroyuki Hoshi¹ (1. Aichi University of Education)

2:30 PM - 2:45 PM

[SGL27-04] Miocene paleostress evolution along the Tanakura Fault Zone, Japan: Through the opening of the Sea of Japan to the collision of the Honshu and Izu-Bonin-Mariana arcs

*Jun Hosoi¹ (1. Department of Earth Sciences, College of Science, Ibaraki University, Japan)

2:45 PM - 3:00 PM

[SGL27-05] Coexistence of pillow and pseudo-pillow lavas in the Late Miocene-Pliocene Subari Andesite, Happo Town, Akita Prefecture

Kyo Takahashi¹, *Masataka Aizawa¹, Mitsuhiro Yasui^2,3, Takumi Imura⁴, Hibiki Demura¹ (1. Hokkaido Education University, Sapporo Campus, 2. Sohken Consultant, Co. Ltd., 3. Guide group of Happo-Shirakami Geopark, 4. Yamagata University, Faculty of Science)

Discussion (3:00 PM - 3:15 PM)

Session information