Updated on 2026/07/29

写真a

 
SHIMURA Yusuke
 
Organization
Graduate School of Environmental Studies Department of Earth and Environmental Sciences Geology and Geobiology Lecturer
Undergraduate School
School of Science
Title
Lecturer

Research Interests 7

  1. Cretaceous

  2. Subduction zone

  3. Geological map

  4. Regional geology

  5. High-P/low-T metamorphic complex

  6. Accretionary complex

  7. Tectonics

Research Areas 1

  1. Natural Science / Solid earth science

Research History 6

  1. Nagoya University   Graduate School of Environmental Studies Department of Earth and Environmental Sciences   Lecturer

    2026.4

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    Country:Japan

  2. Shimane University   Interdisciplinary Faculty of Science and Engineering Department of Earth Science

    2024.1

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    Country:Japan

  3. Research Institute of Geology and Geoinformation, Geological Survey of Japan, AIST   Researcher

    2022.4 - 2026.3

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    Country:Japan

  4. Research Institute of Geology and Geoinformation, Geological Survey of Japan, AIST   PD, Research Fellowship for Young Scientists, Japan Society for the Promotion of Science

    2021.4 - 2022.3

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    Country:Japan

  5. Graduate School of Environmental Studies, Nagoya University   PD, Research Fellowship for Young Scientists, Japan Society for the Promotion of Science

    2020.10 - 2021.3

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    Country:Japan

  6. Graduate School of Environmental Studies, Nagoya University   DC2, Research Fellowship for Young Scientists, Japan Society for the Promotion of Science

    2020.4 - 2020.9

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    Country:Japan

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Education 3

  1. Nagoya University   Graduate School of Environmental Studies   Department of Earth and Environmental Sciences

    2018.4 - 2020.9

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    Country: Japan

  2. Shinshu University   Graduate School of Science and Technology   Department of Geology

    2016.4 - 2018.3

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    Country: Japan

  3. Shinshu University   Faculty of Science   Department of Geology

    2012.4 - 2016.3

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    Country: Japan

Professional Memberships 4

  1. Specialty Coffee Association of Japan

    2026.4

  2. Japan Geoscience Union

    2023.2

  3. 日本地球化学会

    2020.9

  4. 日本地質学会

    2015.6

Awards 3

  1. 優秀ポスター賞

    2019.9   日本地質学会   紀伊半島中央部,吉野-五條地域に分布する白亜紀付加-変成コンプレックスの岩相と地質構造

    志村侑亮, 竹内 誠, 常盤哲也

  2. 優秀ポスター賞

    2018.9   日本地質学会   紀伊半島中央部,三波川-四万十境界周辺の変形構造と被熱温度

    志村侑亮, 常盤哲也, 森 宏, 竹内 誠, 纐纈佑衣

  3. 特に優れた業績による返還免除

    2018.5   日本学生支援機構  

    志村侑亮

 

Papers 23

  1. Origin, tectonic processes, and metasomatism of serpentinite in the Shimanto Accretionary Complex, SW Japan: Possible diapiric intrusion of serpentinized oceanic lithosphere

    Yusuke Shimura, Shunsuke Endo, Yoshihiro Asahara, Toshiki Haji, Kentaro Ushimaru, Koshi Yamamoto

    Tectonics   Vol. 45 ( 7 ) page: e2025TC009237   2026.7

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    Authorship:Lead author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1029/2025TC009237

  2. Conglomerates in the ShimantoAccretionary Complex, SW Japan: Origin,deposition, and the influence of subductionof the Izanagi–Pacific spreading‐ridge Reviewed

    Yusuke Shimura, Hidetoshi Hara, Tetsuya Tokiwa, Yoshihiro Nakamura, Yoshihiro Asahara

    Tectonics   Vol. 44 ( 3 ) page: e2024TC008497   2025.3

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1029/2024TC008497

  3. Detrital zircon U–Pb geochronology of the trench-fill sandstone on the Cretaceous Shimanto accretionary complex in SW Japan: Implications for provenance and igneous activity in the eastern edge of East Asia Reviewed

    Tetsuya Tokiwa, Yusuke Shimura, Hiroshi Mori

    Cretaceous Research   Vol. 166   page: 106012   2025.2

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.cretres.2024.106012

  4. An automatic peak deconvolution code for Raman spectra of carbonaceous material and a revised geothermometer for intermediate- to moderately high-grade metamorphism Reviewed

    Shunya Kaneki, Yui Kouketsu, Mutsuki Aoya, Yoshihiro Nakamura, Simon R. Wallis, Yusuke Shimura, Ken Yamaoka

    Progress in Earth and Planetary Science   Vol. 11   page: 35   2024.6

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1186/s40645-024-00637-8

  5. Tectonic division of the Southwestern terrane at the western Sør Rondane Mountains, Dronning Maud Land, East Antarctica, from a viewpoint of zircon U-Pb ages Reviewed

    Kazuhiro Tsukada, Purevdulam Sukhbaatar, Masaaki Owada, Toshiaki Shimura, Masaki Yuhara, Atsushi Kamei, Yusuke Shimura, Onon Gantumur

    Journal of Mineralogical and Petrological Sciences   Vol. 118   page: S013   2023.10

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.2465/jmps.221203

  6. Magmatism and tectonic setting of proto-Japan during the Early Carboniferous: Constraints from the geochemical characteristics of mafic volcanic rocks in the Hida Gaien Belt, SW Japan Reviewed

    Yusuke Shimura, Kazuhiro Tsukada, Koshi Yamamoto, Bayart Nadmid

    Journal of Asian Earth Sciences   Vol. 236   page: 105312   2022.9

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.jseaes.2022.105312

  7. Zircon U-Pb ages of the Mesozoic systems in the northern Shimonita area, Kanto Mountains, central Japan Reviewed

    Kota Kawai, Makoto Takeuchi, Yusuke Shimura, Kohei Sato, Masayo Minami

    Bulletin of Gunma Museum of Natural History   ( 26 ) page: 75 - 90   2022.3

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    Language:Japanese   Publishing type:Research paper (bulletin of university, research institution)  

  8. Deformation characteristics and peak temperatures of the Sanbagawa Metamorphic and Shimanto Accretionary complexes on the central Kii Peninsula, SW Japan Reviewed

    Yusuke Shimura, Tetsuya Tokiwa, Hiroshi Mori, Makoto Takeuchi, Yui Kouketsu

    Journal of Asian Earth Sciences   Vol. 215   page: 104791 - 104791   2021.8

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)   Publisher:Elsevier BV  

    DOI: 10.1016/j.jseaes.2021.104791

  9. Zircon U–Pb ages on plutonic rocks in the eastern area of 1:200,000 quadrangle, Toyama, central Japan Reviewed

    Makoto Takeuchi, Sui Jia, Yusuke Shimura

    Bulletin of the Geological Survey of Japan   Vol. 72 ( 1 ) page: 41 - 64   2021.3

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    Language:Japanese   Publishing type:Research paper (scientific journal)   Publisher:National Institute of Advanced Industrial Science  

    DOI: 10.9795/bullgsj.72.41

  10. The magmatic relationship between the "Kurotani ultra-mafic rock" and the Ordovician(?) Iwatsubodani Formation, Takayama City, Hida Gaien belt, central Japan: the chemical composition of clinopyroxene Reviewed

    Kazuhiro Tsukada, Yusuke Shimura, Bayart Nadmid

    Bulletin of the Nagoya University Museum   ( 36 ) page: 53 - 68   2021.3

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Nagoya University Museum  

  11. Use of detrital zircon U–Pb ages to assess the timing of deposition of Cretaceous trench-fill deposits in the active continental arc along the East Asian margin Reviewed

    Tetsuya Tokiwa, Yusuke Shimura, Makoto Takeuchi, Hiroshi Mori

    Journal of Asian Earth Sciences   Vol. 207   page: 104657 - 104657   2021.3

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Elsevier BV  

    DOI: 10.1016/j.jseaes.2020.104657

  12. The latest Early Cretaceous detrital zircons from clastic rocks in the Koshibu-gawa area of the central Akaishi Mountains Reviewed

    Yusuke Shimura, Yoshihiro Nakamura, Tetsuya Tokiwa, Taishi Sugimoto, Soya Mito

    The Journal of the Geological Society of Japan   Vol. 127 ( 1 ) page: 51 - 58   2021.1

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    Authorship:Lead author   Language:Japanese   Publishing type:Research paper (scientific journal)   Publisher:The Geological Society of Japan  

    We conducted U-Pb dating of detrital zircons from three clastic rock samples, which have been classified into the Chichibu Belt in the Koshibu-gawa area, central Akaishi Mountains. U-Pb ages of the samples fall into two main age groups at 280-100 Ma and 2600-1700 Ma. The youngest single grain ages are 105.5±1.3 Ma, 109.6±1.2 Ma, and 111.1±1.9 Ma, and the youngest cluster ages are 115.9±1.0 Ma, 115.1±0.4 Ma, and 113.1±1.3 Ma. These Aptian to Albian (latest Early Cretaceous) ages are considerably younger than previously reported youngest ages from the Jurassic accretionary complex of the Chichibu Belt in the southern part of the Koshibu-gawa area (Okuchausu-yama area). Our results indicate that the geological bodies, including clastic rocks studied in the Koshibu-gawa area, should be assigned to the Cretaceous accretionary complex of the Shimanto Belt, and not to the Jurassic accretionary complex of the Chichibu Belt. Reexamination of the structural evolution and geological architecture in the Koshibu-gawa area is thus warranted.

    DOI: 10.5575/geosoc.2020.0048

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  13. Geological traverse across the Shimanto and Sanbagawa belts on the central Kii Peninsula, SW Japan Reviewed

    Yusuke Shimura, Makoto Takeuchi, Tetsuya Tokiwa

    The Journal of the Geological Society of Japan   Vol. 126 ( 7 ) page: 383 - 399   2020.7

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    Authorship:Lead author   Language:Japanese   Publishing type:Research paper (scientific journal)   Publisher:The Geological Society of Japan  

    DOI: 10.5575/geosoc.2020.0019

  14. Detrital zircon U–Pb ages of the Cretaceous Unokawa Complex in the Shimanto Belt on the central Kii Peninsula, SW Japan Reviewed

    Yusuke Shimura, Makoto Takeuchi, Tetsuya Tokiwa, Akari Ota

    The Journal of the Geological Society of Japan   Vol. 126 ( 4 ) page: 223 - 230   2020.4

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    Authorship:Lead author   Language:Japanese   Publishing type:Research paper (scientific journal)   Publisher:The Geological Society of Japan  

    DOI: 10.5575/geosoc.2019.0050

  15. Chert–clastic sequence in the Cretaceous Shimanto Accretionary Complex on the central Kii Peninsula, SW Japan Reviewed

    Yusuke Shimura, Makoto Takeuchi, Tetsuya Tokiwa

    Island Arc   Vol. 29 ( 1 ) page: e12345   2020.1

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)   Publisher:Wiley  

    DOI: 10.1111/iar.12345

    Other Link: https://onlinelibrary.wiley.com/doi/full-xml/10.1111/iar.12345

  16. Detrital zircon U–Pb ages of the accretionary complex in the Chichibu Belt in the central part of the Akaishi Mountains, central Japan Reviewed

    Taishi Sugimoto, Tetsuya Tokiwa, Yusuke Shimura

    The Journal of the Geological Society of Japan   Vol. 125 ( 11 ) page: 827 - 832   2019.11

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    Language:Japanese   Publishing type:Research paper (scientific journal)   Publisher:The Geological Society of Japan  

    DOI: 10.5575/geosoc.2019.0029

  17. Lithological, structural, and chronological relationships between the Sanbagawa Metamorphic Complex and the Cretaceous Shimanto Accretionary Complex on the central Kii Peninsula, SW Japan Reviewed

    Yusuke Shimura, Tetsuya Tokiwa, Makoto Takeuchi, Hiroshi Mori, Koshi Yamamoto

    Island Arc   Vol. 28 ( 6 ) page: e12325   2019.11

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)   Publisher:Wiley  

    DOI: 10.1111/iar.12325

    Other Link: https://onlinelibrary.wiley.com/doi/full-xml/10.1111/iar.12325

  18. Provenance of trench-fill deposits of the Jurassic Chichibu accretionary complex, Southwest Japan Reviewed

    Tetsuya Tokiwa, Yusuke Shimura, Makoto Takeuchi, Shinji Shimosato, Koshi Yamamoto, Hiroshi Mori

    Journal of Asian Earth Sciences   Vol. 184   page: 103970 - 103970   2019.10

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Elsevier BV  

    DOI: 10.1016/j.jseaes.2019.103970

  19. Geological structure and detrital zircon U–Pb age around the boundary between the Jurassic Chichibu and Cretaceous Shimanto accretionary complexes in the central Kii Peninsula, SW Japan Reviewed

    Yusuke Shimura, Tetsuya Tokiwa, Makoto Takeuchi, Koshi Yamamoto

    The Journal of the Geological Society of Japan   Vol. 125 ( 5 ) page: 349 - 365   2019.5

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    Authorship:Lead author   Language:Japanese   Publishing type:Research paper (scientific journal)   Publisher:The Geological Society of Japan  

    DOI: 10.5575/geosoc.2018.0072

  20. Detrital zircon U–Pb ages of the Cretaceous Akaishi Group in the Shimanto Belt, Akaishi Mountains Reviewed

    Tetsuya Tokiwa, Kazuya Ichitani, Yusuke Shimura, Makoto Takeuchi, Koshi Yamamoto

    The Journal of the Geological Society of Japan   Vol. 124 ( 7 ) page: 539 - 544   2018.7

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    Language:Japanese   Publishing type:Research paper (scientific journal)   Publisher:The Geological Society of Japan  

    DOI: 10.5575/geosoc.2018.0012

  21. Geology and detrital zircon U–Pb age of the Cretaceous Mugitani Formation in the Shimanto Belt, central Kii Peninsula, Southwest Japan Reviewed

    Yusuke Shimura, Tetsuya Tokiwa, Makoto Takeuchi, Koshi Yamamoto

    The Journal of the Geological Society of Japan   Vol. 123 ( 11 ) page: 925 - 937   2017.11

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    Authorship:Lead author   Language:Japanese   Publishing type:Research paper (scientific journal)   Publisher:The Geological Society of Japan  

    DOI: 10.5575/geosoc.2017.0032

  22. Effectiveness for determination of depositional age by detrital zircon U–Pb age in the Cretaceous Shimanto accretionary complex of Japan Reviewed

    Tetsuya Tokiwa, Makoto Takeuchi, Yusuke Shimura, Kazuho Shobu, Akari Ota, Koshi Yamamoto, Hiroshi Mori

    Evolutionary Models of Convergent Margins – Origin of Their Diversity     page: 197 - 228   2017.6

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    Language:English   Publishing type:Part of collection (book)   Publisher:InTech  

    DOI: 10.5772/67982

  23. U–Pb ages of detrital zircon from the tuffaceous sandstone of the Shimanto Belt in the Kii Peninsula Reviewed

    Tetsuya Tokiwa, Makoto Takeuchi, Yusuke Shimura, Akari Ota, Koshi Yamamoto

    The Journal of the Geological Society of Japan   Vol. 122 ( 12 ) page: 625 - 635   2016.12

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    Language:Japanese   Publishing type:Research paper (scientific journal)   Publisher:The Geological Society of Japan  

    <p>We carried out the U-Pb dating on detrital zircons obtained from tuffaceous sandstone in the Nyunokawa Formation of the Shimanto Belt in the Kii Peninsula to clarify its depositional age. The youngest peak age from the Nyunokawa Formation indicates 63.0±1.8 Ma (2σ). On the other hand, the age of detrital zircons from the Otonashigawa Group indicates 50.8±1.0 Ma (2σ) corresponding to radiolarian ages obtained from this group. Therefore, there is a major gap between the depositional ages of the Nyunokawa Formation and the Otonashigawa Group. In addition, the age from the Ryujin Formation distributed along the thrust bounded between the Nyunokawa Formation and the Otonashigawa Group shows 55.8±2.5 Ma (2σ). Basically, the depositional ages become younger as tectono-stratigraphically downward (north to south), and the tendency corresponds to the characteristics yielding an accretionary complex.</p>

    DOI: 10.5575/geosoc.2016.0045

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MISC 3

  1. 紀伊半島中央部,白亜紀の高圧変成~非変成付加体の地質構造発達史の解明

    志村侑亮

    「2019年度深田研究助成」研究報告     page: 11 - 27   2020.9

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    Authorship:Lead author   Language:Japanese   Publishing type:Rapid communication, short report, research note, etc. (bulletin of university, research institution)  

  2. Bコース,付加型沈み込み帯浅部の地質構造:房総半島南部付加体-被覆層システム,参加者の感想

    志村侑亮

    日本地質学会News   Vol. 19 ( 11 ) page: 16 - 16   2016.11

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    Authorship:Lead author   Language:Japanese  

  3. 日本地質学会第123年学術大会の報告

    志村侑亮, 水戸創也

    日本地質学会News   Vol. 19 ( 11 ) page: 41 - 42   2016.11

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    Authorship:Lead author   Language:Japanese  

Presentations 25

  1. 紀伊半島中央部,白亜紀沈み込みメガコンプレックスを対象とした地質学的研究:プレート収束型テクトニクスの解明に向けて Invited

    志村侑亮, 常盤哲也, 竹内 誠

    日本地質学会第128年学術大会  2021.9.6 

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    Event date: 2021.9

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

  2. 紀伊半島中央部に分布する三波川変成岩類および四万十付加体の構造発達史:野外調査およびジルコンU–Pb年代からのアプローチ

    志村侑亮, 常盤哲也, 竹内 誠

    2020年度日本地球化学会第67回オンライン年会  2020.11.19 

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    Event date: 2020.11

    Language:Japanese   Presentation type:Oral presentation (general)  

  3. 砕屑性ジルコンU–Pb年代からみた白亜紀火成弧の隆起と砕屑物の供給系 Invited

    竹内 誠, 守法亮佑, 志村侑亮, カ スイ, 菖蒲一歩, 太田明里, 常盤哲也

    日本地質学会第126年学術大会  2019.9.24 

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    Event date: 2019.9

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

  4. 紀伊半島中央部,吉野-五條地域に分布する白亜紀付加-変成コンプレックスの岩相と地質構造

    志村侑亮, 竹内 誠, 常盤哲也

    日本地質学会第126年学術大会  2019.9.23 

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    Event date: 2019.9

    Language:Japanese   Presentation type:Poster presentation  

  5. 紀伊半島中央部,中央構造線周辺の三波川帯中に認められる右横ずれ剪断を伴う断層

    志村侑亮

    日本地質学会第126年学術大会  2019.9.24 

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    Event date: 2019.9

    Language:Japanese   Presentation type:Oral presentation (general)  

  6. 紀伊半島中央部に分布する三波川変成岩類と白亜紀四万十付加体の地質構造

    志村侑亮, 常盤哲也, 森 宏, 竹内 誠, 纐纈佑衣

    変成岩などシンポジウム2019  2019.3.17 

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    Event date: 2019.3

    Language:Japanese   Presentation type:Poster presentation  

  7. 紀伊半島中央部に分布する秩父-四万十付加体境界周辺の地質構造と砕屑性ジルコンU–Pb年代

    志村侑亮, 常盤哲也, 竹内 誠, 山本鋼志

    日本地質学会第125年学術大会  2018.12.1 

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    Event date: 2018.12

    Language:Japanese   Presentation type:Oral presentation (general)  

  8. 紀伊半島中央部,三波川-四万十境界周辺の変形構造と被熱温度

    志村侑亮, 常盤哲也, 森 宏, 竹内 誠, 纐纈佑衣

    日本地質学会第125年学術大会  2018.9.6 

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    Event date: 2018.9

    Language:Japanese   Presentation type:Poster presentation  

  9. 紀伊半島中央部に分布する三波川変成岩類と白亜紀四万十付加体の構造,年代,および温度関係

    志村侑亮, 常盤哲也

    信州大学先鋭領域融合研究群山岳科学研究所2017年度報告会  2018.3.20 

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    Event date: 2018.3

    Language:Japanese   Presentation type:Poster presentation  

  10. 白亜紀地質体の変形様式と最大被熱温度の関係について

    志村侑亮, 常盤哲也, 森 宏, 纐纈佑衣, 竹内 誠

    変成岩などシンポジウム2018  2018.3.18 

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    Event date: 2018.3

    Language:Japanese   Presentation type:Oral presentation (general)  

  11. 紀伊半島中央部における三波川帯の地質構造および温度構造

    山岡 健, 森 宏, 吉田 宏, 志村侑亮, 常盤哲也, 纐纈佑衣

    変成岩などシンポジウム2018  2018.3.17 

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    Event date: 2018.3

    Language:Japanese   Presentation type:Poster presentation  

  12. 紀伊半島東部,大台地域における三波川帯-秩父帯境界域の地質構造および温度構造

    吉田 宏, 森 宏, 山岡 健, 志村侑亮, 常盤哲也, 纐纈佑衣

    変成岩などシンポジウム2018  2018.3.17 

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    Event date: 2018.3

    Language:Japanese   Presentation type:Poster presentation  

  13. 紀伊半島中央部~中部地方における西南日本外帯の温度構造

    森 宏, 常盤哲也, 志村侑亮, 山岡 健, 吉田 宏, 友岡洋介, 中野颯斗, 纐纈佑衣

    変成岩などシンポジウム2018  2018.3.17 

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    Event date: 2018.3

    Language:Japanese   Presentation type:Oral presentation (general)  

  14. Accuracy of determining the age of deposition by detrital zircon U–Pb dating on the eastern margin of the Asian continent during the late Cretaceous to Paleogene

    Tetsuya Tokiwa, Makoto Takeuchi, Yusuke Shimura, Kazuho Shobu, Akari Ota, Koshi Yamamoto, Hiroshi Mori

    6th International Symposium of the International Geoscience Programme (IGCP) Project-589  2017.9.29 

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    Event date: 2017.9

    Language:English   Presentation type:Oral presentation (general)  

  15. Sinistral subduction along the eastern margin of the Asian continent in late Campanian

    Soya Mito, Tetsuya Tokiwa, Yusuke Shimura

    6th International Symposium of the International Geoscience Programme (IGCP) Project-589  2017.9.29 

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    Event date: 2017.9

    Language:English   Presentation type:Poster presentation  

  16. 三波川変成岩類と白亜紀四万十付加体の構造関係について

    志村侑亮, 常盤哲也, 竹内 誠, 森 宏, 山本鋼志

    日本地質学会第124年学術大会  2017.9.18 

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    Event date: 2017.9

    Language:Japanese   Presentation type:Oral presentation (general)  

  17. 四万十帯白亜系花園付加コンプレックスの変形構造解析

    水戸創也, 常盤哲也, 志村侑亮

    日本地質学会第124年学術大会  2017.9.18 

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    Event date: 2017.9

    Language:Japanese   Presentation type:Poster presentation  

  18. 紀伊半島中央部に分布するジュラ紀秩父付加体と白亜紀四万十付加体の低角度断層境界について

    志村侑亮, 常盤哲也

    日本地質学会第124年学術大会  2017.9.18 

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    Event date: 2017.9

    Language:Japanese   Presentation type:Poster presentation  

  19. 紀伊半島中央部に分布する三波川変成岩類と四万十付加コンプレックスのテクトニック境界

    志村侑亮, 常盤哲也, 森 宏

    変成岩などシンポジウム2017  2017.3.19 

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    Event date: 2017.3

    Language:Japanese   Presentation type:Oral presentation (general)  

  20. 紀伊半島に分布する四万十帯白亜紀付加コンプレックスの地質構造

    志村侑亮, 常盤哲也

    信州大学先鋭領域融合研究群山岳科学研究所2016年度報告会  2017.3.14 

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    Event date: 2017.3

    Language:Japanese   Presentation type:Poster presentation  

  21. Sinistral subduction along the eastern margin of the Asian continent during Albian to Cenomanian

    Tetsuya Tokiwa, Akari Ota, Yusuke Shimura, Hiroshi Mori

    The 5th International Symposium of the International Geosciences Programme Project 589  2016.10.28 

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    Event date: 2016.10

    Language:English   Presentation type:Oral presentation (general)  

  22. The accretionary complexes large-scaly juxtaposed by the out-of-sequence thrust in the Cretaceous Shimanto Belt of southwest Japan

    Yusuke Shimura, Tetsuya Tokiwa, Makoto Takeuchi, Akari Ota, Koshi Yamamoto

    The 5th International Symposium of the International Geosciences Programme Project 589  2016.10.27 

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    Event date: 2016.10

    Language:English   Presentation type:Poster presentation  

  23. 紀伊半島中央部に分布する四万十帯白亜系麦谷層の地質と地質構造

    志村侑亮, 常盤哲也, 竹内 誠, 山本鋼志

    日本地質学会第123年学術大会  2016.9.10 

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    Event date: 2016.9

    Language:Japanese   Presentation type:Poster presentation  

  24. 紀伊半島中央部に分布する梁瀬断層周辺の地質と地質構造

    水戸創也, 常盤哲也, 志村侑亮

    日本地質学会第123年学術大会  2016.9.10 

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    Event date: 2016.9

    Language:Japanese   Presentation type:Poster presentation  

  25. 紀伊半島に分布する日高川帯丹生川層より得られたジルコンのU–Pb年代

    志村侑亮, 常盤哲也, 竹内 誠, 山本鋼志, 高橋 康

    日本地質学会第122年学術大会  2015.9.11 

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    Event date: 2015.9

    Language:Japanese   Presentation type:Poster presentation  

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KAKENHI (Grants-in-Aid for Scientific Research) 6

  1. 地震発生帯深度に応じた巨大分岐断層帯の幅とすべり形態の変遷

    Grant number:26K17261  2026.4 - 2029.3

    日本学術振興会  科学研究費助成事業  若手研究

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    Authorship:Principal investigator 

  2. 紀伊半島の広域野外調査による地震発生帯の内部構造復元とその形成様式の解明

    Grant number:22H05314  2022.6 - 2024.3

    日本学術振興会  科学研究費助成事業 学術変革領域研究(A)  学術変革領域研究(A)

    志村 侑亮

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    Authorship:Principal investigator 

    Grant amount:\4940000 ( Direct Cost: \3800000 、 Indirect Cost:\1140000 )

  3. 深紫外レーザーが拓くラマン分光岩石学の新展開

    Grant number:21H01193  2021.4 - 2024.3

    日本学術振興会  科学研究費助成事業 基盤研究(B)  基盤研究(B)

    中村 佳博, 原 英俊, 志村 侑亮

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    Authorship:Coinvestigator(s) 

    本年度は,有機物や周囲の鉱物から発生する蛍光を避けながら高精度なラマンスペクトルを取得する目的で,深紫外レーザー搭載した独自の顕微ラマン分光システムの構築を目指し研究を実施した.予算執行可能となり次第,深紫外ラマン分光法に最適な深紫外パルスレーザーを選定し,分析に必要な新型CCD検出器・深紫外用光学素子の選定を行った.予算の関係上,当初予定していたICCD検出器の導入は見送り,266nmの深紫外レーザーに最適なシステムで構築することになった.本装置内部には,異なる特性のダイクロイックミラーを2枚配置し,深紫外レーザー光・ラマン信号・蛍光スペクトルを効率的に分光できる光学系を構築した.この光学系によって一般的に感度が低いと言われている前面照射型CCD検出器でも十分なラマンスペクトルを取得できるようになった.
    立ち上げを行った深紫外顕微ラマン分光装置は,2022年1月から本格的に運用している.顕微分析を実施するにあたり,今年度はビトリナイト反射率0.5%の石炭試料を利用して最適な分析条件の絞り込みを行った.レーザー強度を10段階に変更しレーザーダメージによる表面形状とラマンスペクトル変化を観察した.すると0.16J/cm-2以下のレーザー強度であれば,レーザーダメージを受けていない最適なラマンスペクトルが取得できることを発見した.この分析条件でその他の試料も分析を行うことで,深紫外顕微ラマン分光装置を用いた新しい温度指標構築が可能となる見通しを立てた.

  4. プレート収束域における白亜紀地質体の付加・上昇テクトニクス

    Grant number:20J12701  2020.4 - 2022.3

    日本学術振興会  科学研究費助成事業 特別研究員奨励費  特別研究員奨励費

    志村 侑亮

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    Authorship:Principal investigator 

    Grant amount:\1700000 ( Direct Cost: \1700000 )

    本研究の目的は,プレート収束域における浅部での付加体形成から深部での高圧変成岩類の形成・上昇といった一連の付加・上昇テクトニクスを解明し,モデル構築を行うことである.目的達成のため,白亜紀のプレート収束域で形成された西南日本外帯の四万十付加体と三波川変成岩類を研究対象としている.令和2年度は,野外調査に基づき四万十付加体から三波川変成岩類までの変形様式・変形ステージを把握すること,炭質物ラマン分光分析やEPMA分析に基づき両地質体の最大到達温度・圧力の見積もりを行うことを主な実施計画として挙げた.上記の検証により,四万十付加体から三波川変成岩類までのプレート収束域到達深度に応じた変形構造のトレンドを追跡することを目標とした.
    野外調査の結果,本地質体は脆性変形を記録した四万十付加体,延性変形を記録した三波川変成岩類,およびいずれの変形も記録した中間地質体の3つに区分できることがわかった.中間地質体については,採用以前の準備段階で行った炭質物ラマン分光分析により280~290度の最大到達温度を見積もることができており,この温度は四万十付加体の上限温度と三波川変成岩類の下限温度の中間に位置付けられる.すなわち,白亜紀のプレート収束域では,浅部から深部へ,脆性変形を伴う四万十付加体→脆性+延性変形を伴う中間地質体→延性変形を伴う三波川変成岩類と連続的な特徴変化をしていた可能性がある.
    炭質物ラマン分光分析やEPMA分析を用いた最大到達温度・圧力の見積もりは,現時点で特定の地域での検討に限られる.四万十付加体から三波川変成岩類までの広域温度・圧力条件の見積もりとその空間的分布を把握するため,今後重点的に分析を進めていく.

  5. 紀伊半島中央部,白亜紀の高圧変成~非変成付加体の地質構造発達史の解明

    2019.4 - 2020.3

    深田地質研究所  深田研究助成  2019年度深田研究助成

    志村侑亮

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  6. 紀伊半島中央部吉野地域に分布する三波川帯と四万十帯を対象とした野外調査

    2018.4 - 2019.3

    深田地質研究所  深田野外調査助成  2018年度深田野外調査助成

    志村侑亮

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    Authorship:Principal investigator 

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