Session Oral

T6.［Topic Session］The origin of the Japanese Islands revisited

[3oral201-13] T6.［Topic Session］The origin of the Japanese Islands revisited

Tue. Sep 6, 2022 8:45 AM - 12:00 PM oral room 2 (Build. 14, 101)

Chiar:Yukio Isozaki, Tomohiko Sato, Yusuke Sawaki

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8:45 AM - 9:00 AM

[T6-O-1] The geochemical east-west difference and regional characteristics of the Japan arc basements from the geochemical database, and associated with the Japan arc development models

*Satoru Harguchi¹, Kenta Ueki², Hikaru Iwamori¹ (1. Earthquake Research Institute, the University of Tokyo, 2. JAMSTEC)

9:00 AM - 9:15 AM

[T6-O-2] Origin and evolution of the Paleo-Kuril arc inferred from detrital zircon U-Pb chronology in eastern Hokkaido, NE Asia

*Futoshi Nanayama Nanayama¹, Toru Yamasaki², Toshiya Kanamatsu³, Hideki Iwano^4,5, Tohru Danhara⁴, Takafumi Hirata⁵ (1. Museum of Natural and Environmental History, Shizuoka, 2. Geological Survey of Japan, AIST, 3. JAMSTEC, 4. Kyoto Fission-Track Co., Ltd., 5. The University of Tokyo)

9:15 AM - 9:30 AM

[T6-O-3] Provenance analysis for Cretaceous fore-arc sandstones in Sakhalin: Northern connection of arc-trench system of Japan

*Tomohiko Sato¹, Yukio Isozaki², Yukiyasu Tsutsumi³, Yasunari Shigeta³, Kazuto Kodama⁴, Takashi Hasegawa⁵ (1. Okayama University of Science, 2. The University of Tokyo, 3. National Museum of Nature and Science, 4. Kochi University, 5. Kanazawa University)

9:30 AM - 9:45 AM

[T6-O-4] Fore-arc basin and provenance in Cretaceous SW Japan: Detrital zircon U–Pb age of Cretaceous–Paleogene sandstones in Amakusa Islands, Kumamoto Prefecture

*Satoshi YOSHIDA¹, Yukio Isozaki¹, Hiroki Nakahata¹, Tomohiko Sato², Yukiyasu Tsutsumi³ (1. Department of Earth Science & Astronomy, Graduate School of Arts and Sciences, The University of Tokyo, 2. Okayama University of Science, 3. Department of Geology and Paleontology, National Museum of Nature and Science )

9:45 AM - 10:00 AM

[T6-O-5] Zircon U-Pb ages of Cretaceous granitoids in northern Kyushu, southwest Japan

*Yukiyasu Tsutsumi¹, Kenichiro Tani¹ (1. Department of Geology and Paleontology, National Museum of Nature and Science)

10:00 AM - 10:15 AM

[T6-O-6] Spatiotemporal distribution of Cretaceous–Paleogene igneous activity in Japan and its tectonic relationship

*Ken Yamaoka¹, Simon Richard Wallis¹ (1. The University of Tokyo)

10:15 AM - 10:30 AM

[T6-O-7] Origin of the Hida belt: a failed suture between the two China blocks

*Yukio Isozaki¹ (1. University of Tokyo)

10:30 AM - 10:45 AM

[T6-O-8] （Invited）Tectonic reconstruction of the Honshu Arc: Constraints from zircon U-Pb ages and whole-rock geochemistry of the granitic rocks from the Sea of Japan

*Kenichiro TANI¹, Kenji Horie², Daniel J Dunkley³ (1. National Museum of Nature and Science, 2. National Institute of Polar Research, 3. Polish Academy of Sciences)

10:45 AM - 11:00 AM

[T6-O-9] Paleozoic island-arc tectonic blocks distributed sporadically in the Nedamo and southern North Kitakami belts, NE Japan

*Takayuki Uchino¹ (1. Geological Survey Of Japan, AIST)

11:00 AM - 11:15 AM

[T6-O-10] Geological Structure and Sedimentary Environment of the Tsunemori Formation in Mine City, Yamaguchi Prefecture, Japan.

*Saki SHIHARA¹, Tomohiro TSUJI¹ (1. Graduate School of Sciences and Technology for Innovation, Yamaguchi University)

11:15 AM - 11:30 AM

[T6-O-11] Tectoic setting and paleogeography of proto-Japan during the Early Carboniferous: Constraints from the geochemical characteristics of mafic volcanic rocks in the Hida Gaien Belt

*Yusuke SHIMURA¹, Kazuhiro TSUKADA², Koshi YAMAMOTO², Bayart NADMID³ (1. Geological Survey of Japan, AIST, 2. Nagoya University Museum, 3. Nagoya University)

11:30 AM - 11:45 AM

[T6-O-12] （Invited）Early Palaeozoic faunal assemblages from Japan and their palaeo-geographical signature

*Gengo TANAKA¹ (1. Kumamoto University)

11:45 AM - 12:00 PM

[T6-O-13] Crustal evolution of NE Japan since Ordovician times: since Ordovician: New insights from zirconology based on simultaneous U–Pb/Lu–Hf analyses

*Tatsuki Tsujimori¹, Pastor-Gálan Daniel^2,1, Ganbat Ariuntsetseg^3,1 (1. Tohoku University, 2. Universidad de Granada, 3. University of Hong Kong)

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