The 132nd Annual Meeting of the Geological Society of Japan
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Session OralT2 ［Topic Session］From magma source and magma plumbing system to volcano formation and hydrothermal alterationEDI

[2oral601-10]T2. From magma source and magma plumbing system to volcano formation and hydrothermal alteration

Mon. Sep 15, 2025 9:15 AM - 12:00 PM JST
Mon. Sep 15, 2025 12:15 AM - 3:00 AM UTC
oral room 6(E305)
Chiar:Satoshi SAITO(Ehime University), Keisuke ESHIMA(Yamaguchi Univ. Sci. Tech. Innov.), Yuki KUSANO(Geological Survey of Japan, AIST)
9:15 AM - 9:30 AM JST(12:15 AM - 12:30 AM UTC)

[T2-O-9]Estimation of melt water contents, pressure-temperature conditions, and redox state of granitic magma using zircon and melt inclusions

*Satoshi Saito1, Chiho Ihira1, Taichi Kawashima1, Yuka Taniwaki1, Mayuko Fukuyama2 (1. Ehime University, 2. Akita University)
9:30 AM - 9:45 AM JST(12:30 AM - 12:45 AM UTC)

[T2-O-10]Lu-Hf isotope data of zircon from the Miocene granitoids of Southwest Japan: finding hints for the magma source and tectonic settings

*HAFIZ REHMAN1, Marimo NAKABAYASHI1,3, Daisuke YAMASHITA2, Sun-Lin CHUNG4, Hao-Yang LEE4, Hiroshi YAMAMOTO1 (1. Kagoshima University, 2. Satsumasendai city Koshiki Museum, 3. Mitsubishi Heavy Industries, 4. Academia Sinica,Taiwan)
9:45 AM - 10:00 AM JST(12:45 AM - 1:00 AM UTC)

[T2-O-11]U–Pb zircon ages of the Late Cretaceous volcanic rocks of the Arima Group, SW Japan

*Daisuke SATO1 (1. GSJ, AIST)
10:00 AM - 10:15 AM JST(1:00 AM - 1:15 AM UTC)

[T2-O-12]Magma chamber processes deduced from the crystallization conditions of zircon in the Tono Plutonic Complex, Kitakami Mountains, northeast Japan

*Yasuhiro OGITA1,2, Shuhei SAKATA3, Takeshi OHNO4, Tatsunori YOKOYAMA1, Takashi YUGUCHI5 (1. JAEA, 2. Yamagata Univ., 3. Univ. of Tokyo, ERI, 4. Gakushuin Univ., 5. Kumamoto Univ.)
10:15 AM - 10:30 AM JST(1:15 AM - 1:30 AM UTC)

[2oral601-10-5add]Break

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

[T2-O-13]Magmatic processes of Hakusan Volcano in the Ryohaku Mountains deciphered by Hornblende

*Daiki YAMAUCHI1, Akihiro TAMURA1, Tomoaki MORISHITA1 (1. Kanazawa Univ.)
10:45 AM - 11:00 AM JST(1:45 AM - 2:00 AM UTC)

[T2-O-14]High-Mg andesite from the Mineoka belt

*Yuji Ichiyama1, Tsumugi Kato1 (1. Chiba University)
11:00 AM - 11:15 AM JST(2:00 AM - 2:15 AM UTC)

[T2-O-15]High-Mg andesite sill near the Oidake pluton in Akakusa-Kamishima, Kumamoto prefecture: Possible western extension of the Setouchi Volcanic Rocks

*Hironao Shinjoe1, Kentaro Ushimaru2, Hideki Iwano3, Takafumi Hirata3, Yuji Orihashi4, Minoru Sasaki4 (1. Tokyo Keizai University, 2. Geological Survey of Japan, AIST, 3. Geochemical Research Center, the Univesity of Tokyo, 4. Graduate School of Science and Technology, Hirosaki University)
11:15 AM - 11:30 AM JST(2:15 AM - 2:30 AM UTC)

[T2-O-16]Dehydration and dissolution of biotite during disequilibrium melting of granites

*Hiroshi KAWABATA1, Shigeru Yamashita2 (1. Kochi University, 2. Okayama University)
11:30 AM - 11:45 AM JST(2:30 AM - 2:45 AM UTC)

[T2-O-17]Lithological variation of plutonic rocks in the Iwakuni–Yanai area, Yamaguchi Prefecture

*Masaaki Owada1, Yukari Miyashita2, Atsushi Kamei3, Yasuhito Osanai4, Ippei Kitano5 (1. Yamaguchi University , 2. AIST, 3. Shimane University , 4. Kyusyu University , 5. Hokkaido University)
11:45 AM - 12:00 PM JST(2:45 AM - 3:00 AM UTC)

[T2-O-18]Granitic rocks of Ryoke and San-yo zones as the elements of Cretaceous Flare-up in SW Japan

*Takashi NAKAJIMA1 (1. Kanagawa Prefectural Museum of Natural History)
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