Annual Meeting of the Geological Society of Japan

Annual Meeting of the Geological Society of Japan

Online ISSN : 2187-6665
Print ISSN : 1348-3935
ISSN-L : 1348-3935

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T15. Regional geology and stratigraphy: review and prospect

Organic chemical analyses and sequence stratigraphy of thePleistocene Uonuma group in the northeastern Higashikubiki Hills, Niigata Prefecture, central Japan

Natsumi KASAI, Kai ASANO, Koichi HOYANAGI

Session ID: T15-P-34
Published: 2024
Released on J-STAGE: March 27, 2025

DOIhttps://doi.org/10.14863/geosocabst.2024.0_351

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The characteristics of the paleosols in the Indus Group in the Ladakh area, NW India

Kohki Yoshida, Supriyo Das, Manoj M.C.

Session ID: T15-P-35
Published: 2024
Released on J-STAGE: March 27, 2025

DOIhttps://doi.org/10.14863/geosocabst.2024.0_352

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御岳第1テフラを事例とした給源からの距離と火山ガラスの形態の関係ー屈折率による降下ユニット認定と気泡幅の変化を中心にー

Mayu HASHIMOTO, Takehiko SUZUKI

Session ID: T15-P-36
Published: 2024
Released on J-STAGE: March 27, 2025

DOIhttps://doi.org/10.14863/geosocabst.2024.0_353

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T16. History of Earth

Trace-element behavior in apatite, as a redox proxy for silicic magmas

Yusuke SAWAKI, Hisashi ASANUMA

Session ID: T16-O-1
Published: 2024
Released on J-STAGE: March 27, 2025

DOIhttps://doi.org/10.14863/geosocabst.2024.0_354

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Y/Ho fractionation during basalt alteration in hydrothermal system: An implication for enigmatic superchondritic Y/Ho in Precambrian banded iron formations

Satoshi YOSHIDA, Hisahiro UEDA, Hisashi ASANUMA, Yusuke SAWAKI

Session ID: T16-O-2
Published: 2024
Released on J-STAGE: March 27, 2025

DOIhttps://doi.org/10.14863/geosocabst.2024.0_355

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Secular variations of Hf isotopes of zircons in granitoid with different ages: Changes in formation processes of granitic rocks and plate tectonics through geologic time

Tsuyoshi Komiya

Session ID: T16-O-3
Published: 2024
Released on J-STAGE: March 27, 2025

DOIhttps://doi.org/10.14863/geosocabst.2024.0_356

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Evolution of the atmosphere in the early Earth: In-situ quadruple sulfur isotope analysis on sedimentary rocks in the Eoarchean and numerical calculation of photochemical reaction

Ryota MIHORI, Takayuki USHIKUBO, Kenji SHIMIZU, Tsuyoshi KOMIYA

Session ID: T16-O-4
Published: 2024
Released on J-STAGE: March 27, 2025

DOIhttps://doi.org/10.14863/geosocabst.2024.0_357

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Reconstruction of the Kuroshio Current variability during the Early Pleistocene (MIS 25-21) based on planktonic and benthic foraminiferal oxygen isotope records

Daisuke Kuwano, Yuki Kosugi, Yoshimi Kubota, Koji Kameo

Session ID: T16-O-5
Published: 2024
Released on J-STAGE: March 27, 2025

DOIhttps://doi.org/10.14863/geosocabst.2024.0_358

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Primary report of the microfossil assemblages from Tsunami deposit in Onuma on the southern part of the Sanriku Coast, northeast Japan

Satoshi SASAKI, Kazuma FUJIMORI, Masaki YAMADA, Shungo KAWAGATA, Daisu ...

Session ID: T16-O-6
Published: 2024
Released on J-STAGE: March 27, 2025

DOIhttps://doi.org/10.14863/geosocabst.2024.0_359

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One undescribed ostracode species of the genus Celtia from the Takikawa Formation, Takikawa City, Hokkaido, Japan

Mukai Kazumasa, Tanaka Gengo

Session ID: T16-O-7
Published: 2024
Released on J-STAGE: March 27, 2025

DOIhttps://doi.org/10.14863/geosocabst.2024.0_360

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A record of the Gilbert–Gauss transition from the lacustrine Pliocene Ueno Formation, Kobiwako Group in western Japan

Yuki Haneda, Yasufumi SATOGUCHI, Yusuke SUGANUMA

Session ID: T16-O-8
Published: 2024
Released on J-STAGE: March 27, 2025

DOIhttps://doi.org/10.14863/geosocabst.2024.0_361

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Reconstruction of paleovegetation change by plant biomarker and pollen in the ocean drilling core from the Japan Sea off Hokkaido: Comparison between the paleovegetation proxies.

Chiaki Aoyagi, Ken Sawada, Satoshi Furota, Tomohisa Irino, Yaeko Igara ...

Session ID: T16-O-9
Published: 2024
Released on J-STAGE: March 27, 2025

DOIhttps://doi.org/10.14863/geosocabst.2024.0_362

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Orbital-Scale Variability in the Silicon Cycle Recorded in the Miocene Nakayama Formation on Sado Island in Niigata Prefecture

Jumpei YOSHIOKA, Junichiro KURODA, Takaaki ITAI

Session ID: T16-O-10
Published: 2024
Released on J-STAGE: March 27, 2025

DOIhttps://doi.org/10.14863/geosocabst.2024.0_363

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Paleo-productivity responses against Eocene Hyperthermals: Implications from barium stable isotope records

Yusuke KUWAHARA, Takashi MIYAZAKI, Kazutaka YASUKAWA, Erika TANAKA, Ke ...

Session ID: T16-O-11
Published: 2024
Released on J-STAGE: March 27, 2025

DOIhttps://doi.org/10.14863/geosocabst.2024.0_364

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Integrated stratigraphy and radiometric ages across the K-Pg boundary in Shiranuka Hill, Hokkaido, Japan.

Reishi Takashima, Hayu Ota, Junichiro Kuroda, Mark Schmitz, Keiichi Ha ...

Session ID: T16-O-12
Published: 2024
Released on J-STAGE: March 27, 2025

DOIhttps://doi.org/10.14863/geosocabst.2024.0_365

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Osmium isotope stratigraphy of the Cretaceous-Paleogene boundary in the Shiranuka Hill, Hokkaido

Hayu OTA, Junichiro KURODA, Reishi TAKASHIMA, Hiroyuki HOSHI, Ken SAWA ...

Session ID: T16-O-13
Published: 2024
Released on J-STAGE: March 27, 2025

DOIhttps://doi.org/10.14863/geosocabst.2024.0_366

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Terrestrial and marine biomarkers in the Nemuro Group (eastern Hokkaido, Japan): implications for early Paleogene paleoenvironment

Tatsuya YOSHIDA, Keiichi HAYASHI, Hideto NAKAMURA

Session ID: T16-O-14
Published: 2024
Released on J-STAGE: March 27, 2025

DOIhttps://doi.org/10.14863/geosocabst.2024.0_367

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[Invited] Exploring Past Oceanic Environments through Radiolarian Fossil Species in the Northwestern Pacific: Implications for Climate Change Studies

Kenji Marc Matsuzaki

Session ID: T16-O-15
Published: 2024
Released on J-STAGE: March 27, 2025

DOIhttps://doi.org/10.14863/geosocabst.2024.0_368

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[Invited] Stratigraphy of Paleozoic pelagic deep-sea sedimentary rocks within the Jurassic accretionary complex of Japan

Shun MUTO

Session ID: T16-O-16
Published: 2024
Released on J-STAGE: March 27, 2025

DOIhttps://doi.org/10.14863/geosocabst.2024.0_369

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Conodont and radiolarian biostratigraphy at the Norian/Rhaetian boundary (Late Triassic) in the Inuyama area, Mino Belt, central Japan

Atsushi OSHIMA, Tetsuji ONOUE, Yuki TOMIMATSU, Rigo MANUEL

Session ID: T16-O-17
Published: 2024
Released on J-STAGE: March 27, 2025

DOIhttps://doi.org/10.14863/geosocabst.2024.0_370

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Conodont-radiolarian biostratigraphy and lithofacies changes of the Upper Triassic bedded chert succession from the Chichibu Belt, Tsukumi area, southwest Japan.

Yuki Tomimatsu, Tetsuji Onoue

Session ID: T16-O-18
Published: 2024
Released on J-STAGE: March 27, 2025

DOIhttps://doi.org/10.14863/geosocabst.2024.0_371

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Middle Triassic radiolarian and conodont biostratigraphy and chemostratigraphy in the bedded chert of the Mino and Northern Kitakami belts, Japan

Takuma SHIOHARA, Tetsuji ONOUE, Shun MUTO

Session ID: T16-O-19
Published: 2024
Released on J-STAGE: March 27, 2025

DOIhttps://doi.org/10.14863/geosocabst.2024.0_372

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Kellwasser events in the Upper Devonian Toc Tat and Xom Nha formations, Vietnam

Toshifumi KOMATSU, Hiroki KAWASHIMA, Toshihiro YAMADA, Reishi TAKASHIM ...

Session ID: T16-O-20
Published: 2024
Released on J-STAGE: March 27, 2025

DOIhttps://doi.org/10.14863/geosocabst.2024.0_373

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The stability of atmospheric and oceanic redox states during the Paleozoic

Kazumi OZAKI

Session ID: T16-O-21
Published: 2024
Released on J-STAGE: March 27, 2025

DOIhttps://doi.org/10.14863/geosocabst.2024.0_374

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Non-biological fractionation of oxygen isotope compositions of phosphate: Questioning their utility as biomarkers for early life metabolism

Kosei E. YAMAGUCHI

Session ID: T16-O-22
Published: 2024
Released on J-STAGE: March 27, 2025

DOIhttps://doi.org/10.14863/geosocabst.2024.0_375

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Oxygen isotope compositions of phosphate (d¹⁸O_PO4) have been recently used as inorganic biomarker, paleothermometer, or tracer of phosphate in the environment. Various studies have applied this tool to analyses of natural samples. Previous studies used several precipitation steps (MAGIC: Mg-induced coprecipitation, APM: NH₄ phosphomolybdate, MAP: Mg ammonium phosphate, or CePO₄) followed by ion exchange to isolate phosphate. However, there exist serious analytical problems; (1) time-consuming phosphate-isolating steps, (2) unknown removal efficiency of interfering elements and (3) degree of isotope fractionation during separating procedures. This study overcame these problems by simplifying the conventional procedure to just 3 steps; MAGIC, cation and anion exchange, and by investigating phosphate recovery, removal efficiency of interfering elements, and isotope fractionation on each step to quantitatively assure a newly developed separating method. Phosphate was finally precipitated as Ag₃PO₄ for d¹⁸O_PO4 analysis by TC/EA-irMS. Recovery and removal were almost 100%. Isotope fractionations were small during MAGIC and Ag₃PO₄ precipitation (max. 3.99‰ and 1.62‰, respectively). However, large fractionations occur during anion exchange (13.95‰), which are best explained by Rayleigh distillation-like, irreversible anion exchange reaction by column chromatography. The 13.95‰ fractionation was the largest in non-biological reactions ever published, and comparable to that during biological reactions. These results further underscore, for precise oxygen isotope analysis of phosphate, the importance of perfect phosphate recovery (ensured in this study) especially during anion exchange.

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Evolution of sedimentary environments and climatic conditions in the Miocene to Pleistocene periods in the Thakkhola area, southern Tibetan plateau, central Nepal

Masaaki SHIMADA, Kohki YOSHIDA, Babu Ram GYAWALI

Session ID: T16-P-1
Published: 2024
Released on J-STAGE: March 27, 2025

DOIhttps://doi.org/10.14863/geosocabst.2024.0_376

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Attempt to constrain the depositional age of the Upper Cretaceous strata in the Gobi Desert, Mongolia: apatite U-Pb dating of dinosaur teeth

Rei NISHIMURA, Kentaro CHIBA, Kazumasa AOKI, Tetsu KOGISO

Session ID: T16-P-2
Published: 2024
Released on J-STAGE: March 27, 2025

DOIhttps://doi.org/10.14863/geosocabst.2024.0_377

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Calcite U-Pb Dating of Pedogenic Carbonate Rocks from the Upper Cretaceous of the Gobi Desert, Mongolia

Yudai FUJII, Kazumasa AOKI, Kentaro CHIBA, Khishigjav TSOGTBAATAR, Buu ...

Session ID: T16-P-3
Published: 2024
Released on J-STAGE: March 27, 2025

DOIhttps://doi.org/10.14863/geosocabst.2024.0_378

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Distribution and controlling factors of recent deep-sea benthic foraminifera in southern part of Okinawa Trough

Chika ONAI, Koji KAMEO, Daisuke KUWANO, Makoto OTSUBO, Masataka KINOSH ...

Session ID: T16-P-4
Published: 2024
Released on J-STAGE: March 27, 2025

DOIhttps://doi.org/10.14863/geosocabst.2024.0_379

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Radiolarian fossil assemblages from the Tatsunokuchi Formation, distributed from southern Iwate Prefecture to Miyagi Prefecture, Japan

Takaya ONODERA, Isao MOTOYAMA, Mizuho AIZAWA

Session ID: T16-P-5
Published: 2024
Released on J-STAGE: March 27, 2025

DOIhttps://doi.org/10.14863/geosocabst.2024.0_380

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Stratigraphy and age of the Permian bedded chert succession of the Tamba Belt in the Sasayama area, Japan

Kentaro SAKAMOTO, Tetsuji ONOUE

Session ID: T16-P-6
Published: 2024
Released on J-STAGE: March 27, 2025

DOIhttps://doi.org/10.14863/geosocabst.2024.0_381

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Identification of the Carnian-Norian boundary based on conodont and radiolarian biostratigraphy from bedded chart succession in the Mino belt, central Japan

Mizuki MURAKAMI, Tetsuji ONOUE

Session ID: T16-P-7
Published: 2024
Released on J-STAGE: March 27, 2025

DOIhttps://doi.org/10.14863/geosocabst.2024.0_382

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Biogenic carbon in hydrothermally altered granitoids in the end-Cretaceous (IODP Exp.364 "Chicxulub Impact Crater")

Sakino YAMAGATA, Kosei Yamaguchi, Minoru Ikehara

Session ID: T16-P-8
Published: 2024
Released on J-STAGE: March 27, 2025

DOIhttps://doi.org/10.14863/geosocabst.2024.0_383

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Planktic foraminiferal assemblages in the Kuromatsunai Formation distributed in western Hokkaido, northern Japan

Makoto YAMASAKI, Shu OZAWA, Naoki NEMOTO, Chieko SHIMADA

Session ID: T16-P-9
Published: 2024
Released on J-STAGE: March 27, 2025

DOIhttps://doi.org/10.14863/geosocabst.2024.0_384

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Paleoenvironmental records of pelagic shallow-water sediments at the Smithian- Spathian boundary

Riki MURATA, Akihiro Kano, Tsukasa Takahashi, Ryosuke Saito

Session ID: T16-P-10
Published: 2024
Released on J-STAGE: March 27, 2025

DOIhttps://doi.org/10.14863/geosocabst.2024.0_385

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Effects on the Japan Sea sediments of the evolution of the Monsoon Climate System in Eastern Asia: Implications from Fe and P speciation analyses

Masato Nosakon, Saeka Masuda, Kosei Yamaguchi, Satoshi Takahashi

Session ID: T16-P-11
Published: 2024
Released on J-STAGE: March 27, 2025

DOIhttps://doi.org/10.14863/geosocabst.2024.0_386

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[Cansel]Phosphorus speciation analysis of the Paleocene-Eocene sediments recovered off Yucatán Peninsula, Mexico (IODP Exp.364 "Chicxulub Impact Crater")

Yusaku SHIMANO, Kosei E YAMAGUCHI, Chihiro OGURA, Shun ABE

Session ID: T16-P-12
Published: 2024
Released on J-STAGE: March 27, 2025

DOIhttps://doi.org/10.14863/geosocabst.2024.0_387

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Evidence for Archean oxygenic-photosynthesis by 2D mapping by imaging mass spectrometry (MALDI-TOFMS)

Keiichiro ISHIKAWA, Kosei E YAMAGUCHI, Tomoyo OKUMURA, Akira IJIRI

Session ID: T16-P-13
Published: 2024
Released on J-STAGE: March 27, 2025

DOIhttps://doi.org/10.14863/geosocabst.2024.0_388

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Stratigraphy and age of the Upper Triassic Kamura limestone succession in the Chichibu Belt, Takachiho, Japan

Kousei Hisatsune, Tetsuji Onoue, Rigo Manuel

Session ID: T16-P-14
Published: 2024
Released on J-STAGE: March 27, 2025

DOIhttps://doi.org/10.14863/geosocabst.2024.0_389

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Reconstruction of paleoceanographic environments in the western tropical Indian Ocean since the late Miocene

Shin-ichi KAMIKURI, Kenji M. MATSUZAKI

Session ID: T16-P-15
Published: 2024
Released on J-STAGE: March 27, 2025

DOIhttps://doi.org/10.14863/geosocabst.2024.0_390

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T17. Subduction zones and on-land accretionary complexes

Characteristics of physical property and structure and the formation process of the Upper Prism in the Japan Trench

Nana Kamiya, Yohei Hamada, Hanaya Okuda, Keisuke Nakamoto, Taizo Uchid ...

Session ID: T17-O-1
Published: 2024
Released on J-STAGE: March 27, 2025

DOIhttps://doi.org/10.14863/geosocabst.2024.0_391

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Distribution and internal physical properties of mud volcanoes in Hyuga-nada inferred from active-source seismic data

Ryuta Arai, Kazuya Shiraishi, Yasuyuki Nakamura, Gou Fujie, Arata Kiok ...

Session ID: T17-O-2
Published: 2024
Released on J-STAGE: March 27, 2025

DOIhttps://doi.org/10.14863/geosocabst.2024.0_392

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Toward detection of slow slips in Hyuga-Nada: Challenge with seafloor optical-fiber strainmeter

Masa KINOSHITA, Eiichiro ARAKI, Rie NAKATA, Tomohiro TOKI, Yusuke YOKO ...

Session ID: T17-O-3
Published: 2024
Released on J-STAGE: March 27, 2025

DOIhttps://doi.org/10.14863/geosocabst.2024.0_393

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Model of tectonic melange rheology and natural constraints

Yoshitaka HASHIMOTO

Session ID: T17-O-4
Published: 2024
Released on J-STAGE: March 27, 2025

DOIhttps://doi.org/10.14863/geosocabst.2024.0_394

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The heated temperature estimation along the fossil plate boundary fault using paleomagnetic method

Taizo UCHIDA, Yoshitaka Hashimoto

Session ID: T17-O-5
Published: 2024
Released on J-STAGE: March 27, 2025

DOIhttps://doi.org/10.14863/geosocabst.2024.0_395

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Estimation of driving fluid pressure ratios based on quartz veins developed along subduction plate interfaces: Example from the Tamba Belt, Southwest Japan

Kotaro ISHIDA, Katsushi Sato

Session ID: T17-O-6
Published: 2024
Released on J-STAGE: March 27, 2025

DOIhttps://doi.org/10.14863/geosocabst.2024.0_396

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Geological constraints on change in fluid pressure and differential stress during seismic cycle

Takahiro HOSOKAWA, Yoshitaka HASHIMOTO

Session ID: T17-O-7
Published: 2024
Released on J-STAGE: March 27, 2025

DOIhttps://doi.org/10.14863/geosocabst.2024.0_397

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Laboratory silica sealing, rock fracture, silica vein formation and permeability evolution driven by fluid pressure drop in the seismogenic depths

Ryoto TODA, Masaoki Uno, Atsushi Okamoto

Session ID: T17-O-8
Published: 2024
Released on J-STAGE: March 27, 2025

DOIhttps://doi.org/10.14863/geosocabst.2024.0_398

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Landward slope deformation in the northern Japan Trench, off Iwate -revealed by seismic reflection data

Ryo MIURA, Yasuyuki NAKAMURA, Tetsuo NO, Kaoru TAKIZAWA, Kazuya SHIRAI ...

Session ID: T17-P-1
Published: 2024
Released on J-STAGE: March 27, 2025

DOIhttps://doi.org/10.14863/geosocabst.2024.0_399

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Mineral veins in the Misumi Group, western Shimane Prefecture, Japan: deformation and fluid activity along the subduction interface

Haruto Miki, Shunsuke Endo

Session ID: T17-P-2
Published: 2024
Released on J-STAGE: March 27, 2025

DOIhttps://doi.org/10.14863/geosocabst.2024.0_400

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