The 132nd Annual Meeting of the Geological Society of Japan
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Session OralT1 ［Topic Session］Metamorphic rocks and tectonicsEDI

[2oral201-12]T1. Metamorphic rocks and tectonics

Mon. Sep 15, 2025 8:45 AM - 12:00 PM JST
Mon. Sep 15, 2025 11:45 PM - 3:00 AM UTC
oral room 2(E107)
Chiar:Sreehari LAKSHMANAN(Shimane U.), Ryosuke OYANAGI(Kokushikan University)
8:45 AM - 9:00 AM JST(11:45 PM - 12:00 AM UTC)entryECS

[T1-O-12]Metamorphic History of Serpentinite and Amphibolite in the Sangun-Renge Belt exposed at Sasaguri, Fukuoka Prefecture

*Swarnaa ANNADURAI MUNUSAMY1, Jun-ichi ANDO1,2, Kaushik DAS1,2, Dyuti Prakash SARKAR3, Seiichiro UEHARA4 (1. Hiroshima University, 2. HiPeR, Hiroshima, 3. Yamaguchi University , 4. The Kyushu Univ. Museum)
9:00 AM - 9:15 AM JST(12:00 AM - 12:15 AM UTC)entryECS

[T1-O-13]Strain Distribution and Formation Process of Deep Plate Interface Inferred from the Aka-jima Shear Zone (newly defined) in the Kerama Islands, Okinawa

*Kei TAKAHASHI1, Asuka YAMAGUCHI1, Makoto OTSUBO2 (1. Atmosphere and Ocean Research Institute, The Univeristy of Tokyo, 2. Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology)
9:15 AM - 9:30 AM JST(12:15 AM - 12:30 AM UTC)entryECS

[T1-O-14]Extraction of serpentinite distribution using drone-based magnetometry: A case study from the Sanbagawa Belt, northern Akaishi Mountains

*Nanami KUNIYA1,2, Hiroshi MORI1, Ryuta SHUKUWA3, Yuto YASUI1, Kaho NOBUHARA1, Shigeo OKUMA2, Ayumu MIYAKAWA2, Tetsuya TOKIWA1, Kazuhiro OZAWA4, Ken YAMAOKA2, Takayoshi NAGAYA5, Daichi MURAKAMI1,2 (1. Shinshu university, 2. GSJ, AIST, 3. Goto Metal Mine Co., Ltd., 4. Precision Forestry Measurement Ltd., 5. Waseda University)
9:30 AM - 9:45 AM JST(12:30 AM - 12:45 AM UTC)entry

[T1-O-15]Trace element changes through the contact metamorphism of ultramafic rocks: A case study of the Tari-Misaka complex, Inner Zone of Southwest Japan.

*Makito Narumi1, Yuji Ichiyama1, Akihiro Tamura2, Tomoaki Morishita2 (1. Chiba Univ., 2. Kanazawa Univ.)
9:45 AM - 10:00 AM JST(12:45 AM - 1:00 AM UTC)

[T1-O-16]Detection of heterogeneous graphitization in contact metamorphic rocks using Raman spectral analysis of carbonaceous material in the Sanbagawa Belt, northern Akaishi Mountains

*Hiroshi MORI1, Yuho HAYAKAWA1,2, Tomoki TAGUCHI3, Ken YAMAOKA4, Kazuhiro OZAWA5, Kaho NOBUHARA1, Akiko NAKAZAWA1, Taisei TAKAGI1, Tetsuya TOKIWA1 (1. Shinshu University, 2. Chuo Kaihatsu Corporation, 3. Waseda University, 4. GSJ, AIST, 5. Precision Forestry Measurement Ltd.)
10:00 AM - 10:15 AM JST(1:00 AM - 1:15 AM UTC)

[T1-O-17]Foliation-lineation analysis of hornfels: a case study in Tanzawa Mountains

*Toshiaki MASUDA1, Miki TASAKA2, Takumi MATSUMOTO2, Ryota OHTAKE2, Megumi KURASHINA4, kenji KUSUNOKI3, Mizuho SAKAI3, Hiroyuki YAMASHITA4, Toshihumi NAKAMURA4, Keiji TANI5, Itsuki NATSUME4 (1. Center for Integrated Research and Education of Natural Hazards, Shizuoka University, 2. Faculty of Science, Shizuoka University, 3. Faculty of Education, Shizuoka University, 4. Kanagawa Prefectural Museum of Natural History, 5. Kanagawa Geology Study Group)
10:15 AM - 10:30 AM JST(1:15 AM - 1:30 AM UTC)

[2oral201-12-7add]Break

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

[T1-O-18]Quantitative evaluation of retrograde metamorphism and visualization of spatial patterns using dimensionality reduction of PXRD spectra: a case study from the Eastern Iratsu body in the Sanbagawa metamorphic belt, Shikoku, Japan

*Ryoga Tanabe1, Matsuno Satoshi1, OTGONBAYAR DANDAR1, Keiichi Osaka2, Uno Masaoki3, Atsushi Okamoto1 (1. Tohoku University Graduate School of Environmental Studies, 2. Japan Synchrotron Radiation Research Institute, 3. Department of Earth and Planetary Science, The University of Tokyo)
10:45 AM - 11:00 AM JST(1:45 AM - 2:00 AM UTC)

[T1-O-19]Timing of mantle wedge alteration events recorded by baddeleyite aggregates in the Higuchi serpentinite body, Sanbagawa belt

*Hikaru Sawada1,2, Ryosuke Oyanagi3,2, Sota Niki6, Kazuki Yoshida4, Mitsuhiro Nagata5, Takafumi Hirata7, Atsushi Okamoto8 (1. University of Toyama, 2. JAMSTEC, 3. Kokushikan University, 4. KEK, 5. Nihon University, 6. Nagoya University, 7. The University of Tokyo, 8. Tohoku University)
11:00 AM - 11:15 AM JST(2:00 AM - 2:15 AM UTC)entryECS

[T1-O-20]Geological constraints on slab-mantle coupling depths in subduction zones from the Dora-Maira UHP unit (western Alps)

*Hikaru HOSHI1, Simon WALLIS1 (1. Department of Earth and Planetary Science, The University of Tokyo)
11:15 AM - 11:30 AM JST(2:15 AM - 2:30 AM UTC)

[T1-O-21]Discovery of the serpentine matrix melange with high-grade metamorphic blocks in the Saganoseki Peninsula, Oita Prefecture.

*Atsushi MIYASHITA1, Jouji MURAKAMI2, Akira KASAGI, Tatsuki TSUJIMORI3 (1. The Open University of Japan, 2. Fukuoka Stone Club, 3. Tohoku University)
11:30 AM - 11:45 AM JST(2:30 AM - 2:45 AM UTC)

[T1-O-22]Comparative study of serpentinite mélanges in the Nishisonogi unit and the Nomo unit of the Nagasaki Metamorphic Complex

*Tadao NISHIYAMA1, Miki Shigeno2, Yasushi Mori2, Kazuhiro Miyazaki3 (1. Kumamoto University, 2. Kitakyushu Museum of Natural History and Human History, 3. AIST)
11:45 AM - 12:00 PM JST(2:45 AM - 3:00 AM UTC)

[T1-O-23]Spherule in the serpentinite matrix and experimental study of spherule formation

*Mitsuhiro TORIUMI1 (1. Japan Agency of Marine-Earth Science and Tecnology)
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