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Study on formation mechanism of seafloor hydrothermal deposits based on Cu isotope measurement

Research Project

Project/Area Number 19K03985
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 17030:Human geosciences-related
Research InstitutionUniversity of Tsukuba

Principal Investigator

IKEHATA KEI  筑波大学, 生命環境系, 准教授 (70622017)

Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2021: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
Fiscal Year 2020: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
Fiscal Year 2019: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Keywords海底熱水鉱床 / 銅同位体
Outline of Research at the Start

海底熱水鉱床は、有用元素が熱水溶液から沈殿、濃集して形成されると考えられているが、有用元素の起源や濃集機構に関しては、未だ良く分かっていない。海底熱水鉱床に広く存在する銅の安定同位体比は、銅鉱物形成時の熱水の温度、pH、酸化還元状態等、鉱床の成因の解明に大変有効な指標である。本研究では、海底熱水鉱床試料に含まれる銅の安定同位体比を高精度で測定し、海底熱水鉱床の形成機構を探る。

Outline of Final Research Achievements

Copper isotope compositions of copper-bearing minerals in seafloor hydrothermal deposits around Japan are within the range of those for reported main various copper-bearing minerals in modern seafloor hydrothermal deposits worldwide. Compared with ancient seafloor hydrothermal deposits which may have experienced more significant isotopic homogenization processes, initial (e.g., pre-metamorphic) copper isotopic characteristics of modern seafloor hydrothermal deposits are probably preserved. The spatial distribution of copper isotopic compositions in this study may reflect fluid pathways during hydrothermal activity.

Academic Significance and Societal Importance of the Research Achievements

本研究の結果から、海底熱水鉱床試料に含まれる様々な大きさの各種含銅鉱物の銅同位体組成は、鉱物組織(産状)と詳細に比較することで、銅の起源のみならず、これらの鉱物の晶出に関与した熱水の流路を評価・推定する指標になり得ると考えられる。これらの基礎的な情報は、ある海底熱水変質域中の鉱化流体の広がり(鉱量)や鉱床の品位の評価につながる可能性が高いことから、海底熱水鉱床の探査や開発に役に立つことが期待される。

Report

(4 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (14 results)

All 2021 2019

All Journal Article (4 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 4 results,  Open Access: 1 results) Presentation (10 results) (of which Int'l Joint Research: 1 results,  Invited: 1 results)

  • [Journal Article] Pressure-temperature evolution of andalusite-kyanite-sillimanite-bearing pelitic schists from Nishidohira, southern Abukuma Mountains, Northeast Japan: Implications for Cretaceous rapid burial and exhumation in the Northeast Asian continental margin2021

    • Author(s)
      Yoneguchi Yu, Tsunogae Toshiaki, Takahashi Kazuki, Sakuwaha Kabang'u Grace, Ikehata Kei
    • Journal Title

      Lithos

      Volume: 406-407 Pages: 1-19

    • DOI

      10.1016/j.lithos.2021.106522

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Raman microspectroscopic study of reference clay minerals and alteration minerals in volcanic ejecta from the 7 March 2012 phreatic eruption on Ioto Island (Iwo-jima), Izu-Bonin arc, Japan2021

    • Author(s)
      Ikehata Kei、Arakawa Yoji、Ishibashi Jun-ichiro
    • Journal Title

      Vibrational Spectroscopy

      Volume: 114 Pages: 103247-103247

    • DOI

      10.1016/j.vibspec.2021.103247

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Subseafloor sulphide deposit formed by pumice replacement mineralization2021

    • Author(s)
      Nozaki Tatsuo、Nagase Toshiro、Takaya Yutaro、Yamasaki Toru、Otake Tsubasa、Yonezu Kotaro、Ikehata Kei、Totsuka Shuhei、 Kitada Kazuya、 Sanada Yoshinori、Yamada Yasuhiro、Ishibashi Jun-ichiro、Kumagai Hidenori、Maeda Lena、D/V Chikyu Expedition 909 Scientists
    • Journal Title

      Scientific Reports

      Volume: 11 Issue: 1

    • DOI

      10.1038/s41598-021-87050-z

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Native copper formation associated with serpentinization in the Cheshmeh-Bid ophiolite massif (Southern Iran)2021

    • Author(s)
      Eslami Alireza、Malvoisin Benjamin、Grieco Giovanni、Aradi Laszllo Elod、Marchesi Claudio、Cavallo Alessandro、Montanini Alessandra、Borghini Giulio、Mathur Ryan、Ikehata Kei、Davis Donald W.、Li Chun-Hui、Szabo Csaba
    • Journal Title

      Lithos

      Volume: 382-383 Pages: 105953-105953

    • DOI

      10.1016/j.lithos.2020.105953

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] 伊豆大島におけるヘリウム同位体比の時空間変動2021

    • Author(s)
      角野浩史, 小長谷智哉, 外山浩太郎, 野津憲治, 池端慶, 清水綾
    • Organizer
      日本火山学会2021年度秋季大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Secular variation of helium isotope ratios in Izu Oshima2021

    • Author(s)
      Sumino H., Ikehata K., Shimizu A., Toyama K., Obase T., Notsu K.
    • Organizer
      31st Annual V.M. Goldschmidt Conference
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Secular variation of helium isotope ratios in Izu Oshima: What will be observed in the next eruption?2021

    • Author(s)
      Sumino H., Ikehata K., Shimizu A., Toyama K., Obase T., Notsu K.
    • Organizer
      Japan Geoscience Union Meeting 2021
    • Related Report
      2021 Annual Research Report
  • [Presentation] 沖縄トラフごんどうサイトの海底下の熱水変質鉱物の鉱物学的・地球化学的特徴2019

    • Author(s)
      石橋純一郎、戸塚修平、堤 映日、塚本 成、吉良優佑、島田和彦、山崎 徹、池原 研、長瀬敏郎、高谷雄太郎、池端 慶、後藤隆嗣、郷津知太郎、新城竜一、町山栄章、飯島耕一、山本浩文、熊谷英憲
    • Organizer
      日本地球惑星科学連合2019年大会
    • Related Report
      2019 Research-status Report
  • [Presentation] 沖縄トラフごんどうサイトの海底下から得られた熱水性堆積物の鉱物学的・地球化学的特徴2019

    • Author(s)
      戸塚修平、石橋純一郎、島田和彦、池端 慶、町山栄章、飯島耕一、山本浩文、熊谷英憲、池原 研、山崎 徹、高谷雄太郎、長瀬敏郎、ティンデル トーマス、米津幸太郎、多田祐輝
    • Organizer
      日本地球惑星科学連合2019年大会
    • Related Report
      2019 Research-status Report
  • [Presentation] A series of cummingtonite-bearing rhyolites in Niijima, Izu-Bonin arc, Japan: petrological and geochemical constraints2019

    • Author(s)
      荒川洋二、遠藤大介、大鹿淳也、新村太郎、池端 慶
    • Organizer
      日本地球惑星科学連合2019年大会
    • Related Report
      2019 Research-status Report
    • Invited
  • [Presentation] 箱根山大涌谷の球状硫黄2019

    • Author(s)
      池端 慶、伊達みのり、石橋純一郎、菊川城司、萬年一剛
    • Organizer
      資源地質学会第69回年会
    • Related Report
      2019 Research-status Report
  • [Presentation] 中部沖縄トラフごんどうサイトにおける掘削コア試料中の方鉛鉱のPb同位体組成2019

    • Author(s)
      戸塚修平、石橋純一郎、野崎達生、木村純一、常青、池端 慶、島田和彦、宮本 尭
    • Organizer
      資源地質学会第69回年会
    • Related Report
      2019 Research-status Report
  • [Presentation] 伊是名海穴掘削コア鉱石試料の鉱物学的解析2019

    • Author(s)
      長瀬敏郎、野崎達生、高谷雄太郎、石橋純一郎、山崎 徹、鳥本淳司、戸塚修平、池端 慶、米津幸太郎、ティンデル トーマス、熊谷英憲、前田怜奈
    • Organizer
      資源地質学会第69回年会
    • Related Report
      2019 Research-status Report
  • [Presentation] 沖縄トラフごんどうサイトの海底下における塊状硫化物の鉱物学的特徴2019

    • Author(s)
      戸塚修平、石橋純一郎、島田和彦、宮本 尭、池端 慶
    • Organizer
      日本鉱物科学会2019年年会
    • Related Report
      2019 Research-status Report

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Published: 2019-04-18   Modified: 2023-01-30  

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