The 131st Annual Meeting of the Geological Society of Japan
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Session OralT9 ［Topic Session］Geotectonic framework of Kyushu and Ryukyu arc: new age data and perspectives

[3oral101-09]T9 ［Topic Session］Geotectonic framework of Kyushu and Ryukyu arc: new age data and perspectives

Tue. Sep 10, 2024 9:00 AM - 12:00 PM JST
Tue. Sep 10, 2024 12:00 AM - 3:00 AM UTC
oral room 1(General Education_Section1-112)
Chiar:Kenichiro TANI(National Museum of Nature and Science), Yukiyasu TSUTSUMI(Department of Geology and Paleontology, National Museum of Nature and Science), Yukio ISOZAKI(Dept. Earth Science and Astronomy, Univ. Tokyo)
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9:00 AM - 9:30 AM JST(12:00 AM - 12:30 AM UTC)

[T9-O-1][Invited]Geology of Kyushu revealed by wide-area geological survey

*Makoto Saito1 (1. Geological Survey of Japan, AIST)
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9:30 AM - 9:45 AM JST(12:30 AM - 12:45 AM UTC)

[T9-O-2]Phengite K-Ar dating of the Nagasaki metamorphic rocks in Mogi area, Nomo Peninsula

*Kazumasa AOKI1, Shota KODAIRA2, Koshi YAGI3, Taisei FUJIWARA3, Ikuo OKADA3 (1. Okayama University of Science, 2. Nagasaki City Dinosaur Museum, 3. Hiruzen Institute for Geology and Chronology)
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9:45 AM - 10:00 AM JST(12:45 AM - 1:00 AM UTC)

[T9-O-3]Location of the Butsuzo and Aki Tectonic Lines in the central Ryukyu Arc, Japan: In case of the Amami Islands

*Yukiyasu TSUTSUMI1, Kenichiro TANI1, Hiroshi YAMAMOTO2, Yukio ISOZAKI3 (1. Department of Geology and Paleontology, National Museum of Nature and Science, 2. Graduate School of Science and Engineering, Kagoshima University, 3. Graduate school of Arts and Sciences, University of Tokyo)
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10:00 AM - 10:15 AM JST(1:00 AM - 1:15 AM UTC)

[T9-O-4]Geotectonic position of “Tokunoshima belt” in central Ryukyus: significance of high-grade metamorphics and San-in granitoids in the Shimanto belt

*Yukio ISOZAKI1, Hiroshi Yamamoto2, Yukiyasu Tsutsumi3 (1. Dept. Earth Science and Astronomy, Univ. Tokyo, 2. Graduate School of Science & Engineering, Kagoshima Univ.a, 3. Dept. Geology & Paleontology, National Museum of Nature & Science Japan)
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10:15 AM - 10:30 AM JST(1:15 AM - 1:30 AM UTC)

[3oral101-09-5add]Break

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10:30 AM - 10:45 AM JST(1:30 AM - 1:45 AM UTC)

[T9-O-5]Characteristics of Ryukyu Arc magmatism based on U-Pb zircon dating of granitic rocks and felsic volcanic rocks in the Ryukyu Islands

*Mayuko Fukuyama1, Masatsugu Ogasawara2 (1. Akita Univ., 2. Zipang GeoLab)
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10:45 AM - 11:00 AM JST(1:45 AM - 2:00 AM UTC)

[T9-O-6]Granitoids of the San-in belt within the Ryukyu arc

*Yusuke SAWAKI1, Shuhei Sakata1, Takeshi Ohno2 (1. The University of Tokyo, 2. Gakushuin University)
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11:00 AM - 11:15 AM JST(2:00 AM - 2:15 AM UTC)

[T9-O-7]Tectonic settings of the Cretaceous intrusive rocks in the western part of Chugoku and Kyushu districts

*Masaaki OWADA1, Keisuke Eshima1, Atsushi Kamei2, Yasuhito Osanai3, Yukari Miyashita4 (1. Yamaguchi Univ., 2. Shimane Univ., 3. Kyushu Univ., 4. National Institute of Advanced Industrial Science and Technology)
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11:15 AM - 11:45 AM JST(2:15 AM - 2:45 AM UTC)

[T9-O-8][Invited]Miocene tectonics of Southwest Japan viewed from the temporal and spatial distribution of igneous rocks in trench-proximal regions

*Hironao SHINJOE1, Yuji ORIHASHI2, Ryo ANMA3 (1. Tokyo Keizai University, 2. Hirosaki University, 3. Tokushima University)
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11:45 AM - 12:00 PM JST(2:45 AM - 3:00 AM UTC)

[T9-O-9]The northward migration of the Philippine Sea Plate as revealed by the spatiotemporal variations in Miocene silicic magmatism in the Ryukyu Arc

*Kenichiro TANI1, Yukiyasu TSUTSUMI1, Ken USAMI2 (1. National Museum of Nature and Science, 2. Okinawa Prefectural Museum and Art Museum)
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