Oral

R1 [Regular Session]Plutonic rocks, volcanic rocks and magmatic processes

[3ch301-12] R1 [Regular Session]Plutonic rocks, volcanic rocks and magmatic processes

Mon. Sep 6, 2021 8:00 AM - 11:45 AM ch3 (ch3)

Chiar:Tatsuo Kanamaru, K Michibayashi, Yumiko Harigane

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8:00 AM - 8:15 AM

[R1-O-1] Microstructural analyses of coarse-grained peridotite in the vicinity of mantle diapir in Oman opholite: Implication for seismic anisotropy in lithospheric mantle

*K Michibayashi^1,2,3, Kakihata Yuki¹, Onoue Ayaka², Ohya Syoma², Odashima Norihiro² (1. Nagoya University, 2. Shizuoka University, 3. JAMSTEC)

8:15 AM - 8:30 AM

[R1-O-2] The structure of magma chamber below a fast-spreading ridge based on field observations and core analyses of the Oman ICDP drilling

*Susumu Umino¹, Yuki Kusano², Osamu Ishizuka², Takahiro Fudai³, Akihiro Tamura¹, Tomoaki Morishita¹ (1. School of Geosciences and Civil Engineering, Kanazawa University, 2. Geological Survey of Japan, AIST, 3. Taiheiyo Cement Corrperation)

8:30 AM - 8:45 AM

[R1-O-3] Petrography of gabboric xenoliths sampled from northern offshore Oshima-Oshima volcano, Hokkaido

*Yumiko Harigane¹, Osamu Ishizuka¹, Christopher Conway¹, Gen Shimoda¹, Fukashi Maeno², Scientific Party of Scientific Party of KH-20-7 cruise (1. Geological Survey of Japan, AIST, 2. Earthquake Research Institute, University of Tokyo)

8:45 AM - 9:00 AM

[R1-O-4] Temporal changes of source mantle compositions for Late Cenozoic volcanic rocks in Oki islands, SW Japan

*Masataka Aizawa¹, Ryuichi Shinjo^2,3, Satoshi Okamura^4,5, Yasuhiro Hirai⁶ (1. Graduate School of Engineering and Science, University of the Ryukyus, 2. Faculty of Science, University of the Ryukyus, 3. Research Institute for Humanity and Nature (RIHIN), 4. Hokkaido Education University, 5. Hokkaido Soil-Research Co-op., 6. Japan Agency for Marine-Earth Science and Technology (JAMSTEC))

Break (9:00 AM - 9:15 AM)

9:15 AM - 9:30 AM

[R1-O-5] Zircon U-Pb dating of the Okueyama Volcano-plutonic Complex, Kyushu, Southwest Japan

*Kenichiro Tani¹, Yukiyasu Tsutsumi¹, Kazuki Omura², Masaki Takahashi², Tatsuo Kanamaru² (1. National Museum of Nature and Science, 2. Nihon University)

9:30 AM - 9:45 AM

[R1-O-6] Emplacement mechanism of the ring dike and batholithic pluton of the Okueyama volcano-plutonic complex inferred from anisotropy of magnetic susceptibility

*Tatsuo Kanamaru¹, Masaki Takahashi¹, Kenichiro Tani², Hirokazu Kunishima¹, Daiki Tomita¹, Nozomi Takahashi¹, Joichiro Maru¹, Kenya Iida¹, Kei Hayashi¹, Riku Uetsuki¹, Ryosuke Suzuki¹ (1. College of Humanities and Sciences, Nihon University, 2. National Museum of Nature and Science)

9:45 AM - 10:00 AM

[R1-O-7] Gology and evolution of the Okueyama volcano-plutonic complex, revisited

*Masaki Takahashi¹, Tatsuo Kanamaru¹, Kenichiro Tani² (1. College of Humanities and Sciences, Nihon University, 2. National Museum of Nature and Science)

10:00 AM - 10:30 AM

[R1-O-8] [Invited]Origin and tectonics of Permo-Triassic volcanic rocks in southern Mongolia and Paleoproterozoic granitoids in central Nepal

*Takeshi Imayama¹ (1. Okayama University of Science)

Break (10:30 AM - 10:45 AM)

10:45 AM - 11:00 AM

[R1-O-9] Magma source of San-yo and Ryoke belt granites and fluid-rock interaction of silicoeus veins and Ryoke metamorphic belt schists

*HAFIZ U. REHMAN¹, YAMAMOTO Hiroshi¹ (1. Kagoshima University)

11:00 AM - 11:15 AM

[R1-O-10] Zircon U-Pb ages and petrographic properties of the Middle Miocene Granitic rocks in Koshikijima, Kagoshima Prefecture, Japan

*Marimo Nakabayashi^1,2, Hafiz U. Rehman² (1. Kyushu Univ., 2. Kagoshima Univ.)

11:15 AM - 11:30 AM

[R1-O-11] Crust formation beneath the Japanese Islands viewed from Sr isotopes of the granitic and mafic roks

*Takshi Nakajima^1,2 (1. National Museum of Nature and Science, 2. Kanagawa Prefectural Museum of Natural History)

11:30 AM - 11:45 AM

[R1-O-12] Petrological and Geochemical study of Early ~ Middle Miocene volcanic rocks in Hokuriku region, southwest Japan arc

*Syun WATANABE¹, Toshiro TAKAHASHI¹, Gen SHIMODA², Kosuke GOTO² (1. Niigata univ., 2. National Institute of Advanced Industrial Science and Technology)

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