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Tectonic process resolved by geochemistry of submarine basalts

Research Project

Project/Area Number 17K05715
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Geochemistry/Cosmochemistry
Research InstitutionTohoku University

Principal Investigator

Hirano Naoto  東北大学, 東北アジア研究センター, 准教授 (00451831)

Project Period (FY) 2017-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2019: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2018: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2017: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Keywordsアウターライズ / 太平洋プレート / プチスポット / アルカリ玄武岩 / 沈み込み / 日本海溝 / プレートの変形 / 単成火山 / リソスフェア / アセノスフェア / かんらん岩 / 二酸化炭素 / 海洋プレート / 海溝
Outline of Final Research Achievements

Previous researches indicate that most of petit-spot erupted on concavely flexed plate are highly reacted with the depleted lithosphere during the magma ascending to surface. Geochemical composition of entrained xenolith from depleted mantle is disturbed by wall-rock interaction (Pilet et al., 2016). The research cruise KS-18-9, R/V Shinseimaru, in order to access the asthenosphere in August 2018 newly discovered the directly ascending petit-spot melt from asthenosphere (Sato, Hirano et al., 2018). The lavas, silica-poor and strongly alkaline with phenocrystic olivines, are completely discriminated from the majority of previous petit-spots. They selectively erupt atop the outer-rise wherein the lithosphere behaves entirely extensional during the ascent of melt from asthenosphere. Collaborated works with Univ. Bayreuth (Germany), Nanyang Tech. Univ. (Singapore), and Second Instit. Oceanogr. (China) provided several papers of Hirano et al. (2019), and Liu, Hirano et al. (2020).

Academic Significance and Societal Importance of the Research Achievements

溶岩の産状・マグマ組成・噴出年代・マグマ上昇速度と、海底地形によるプレート構造およびその地理分布を照らし合わせ、プレートの変動履歴が明らかとなった。プレートの挙動が構成する岩石そのものから初めて示されるという点で大変意義深い。沈み込む海洋プレートの地殻構造や応力場の情報は、これまで海底音響探査や地震波を用いた構造探査、いくつかの過程を置いたシミュレーションなど、間接的な情報しか無かったが、本研究によりプレートの物質から直接的に得られた応力場・変動時期の情報として極めて貴重な成果が得られた。

Report

(4 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Research-status Report
  • 2017 Research-status Report
  • Research Products

    (39 results)

All 2020 2019 2018 2017 Other

All Int'l Joint Research (7 results) Journal Article (10 results) (of which Int'l Joint Research: 5 results,  Peer Reviewed: 10 results,  Open Access: 6 results) Presentation (22 results) (of which Int'l Joint Research: 14 results,  Invited: 3 results)

  • [Int'l Joint Research] Bayerisches Geoinstitut(ドイツ)

    • Related Report
      2019 Annual Research Report
  • [Int'l Joint Research] University of Lausanne(スイス)

    • Related Report
      2019 Annual Research Report
  • [Int'l Joint Research] Miami University(米国)

    • Related Report
      2019 Annual Research Report
  • [Int'l Joint Research] Nanyang Technological University(シンガポール)

    • Related Report
      2019 Annual Research Report
  • [Int'l Joint Research] Ministry of Natural Resources(中国)

    • Related Report
      2019 Annual Research Report
  • [Int'l Joint Research] Institute of Earth Science/University of Lausanne(Switzerland)

    • Related Report
      2017 Research-status Report
  • [Int'l Joint Research] Bayerisches Geoinstitut/Universitat Bayreuth(ドイツ)

    • Related Report
      2017 Research-status Report
  • [Journal Article] Melting of recycled ancient crust responsible for the Gutenberg discontinuity2020

    • Author(s)
      Liu Jia、Hirano Naoto、Machida Shiki、Xia Qunke、Tao Chunhui、Liao Shili、Liang Jin、Li Wei、Yang Weifang、Zhang Guoying、Ding Teng
    • Journal Title

      Nature Communications

      Volume: 11 Issue: 1 Pages: 172-172

    • DOI

      10.1038/s41467-019-13958-w

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Alkali basalt from the Seifu Seamount in the Sea of Japan: post-spreading magmatism in a back-arc setting2020

    • Author(s)
      Morishita Tomoaki、Hirano Naoto、Sumino Hirochika、Sato Hiroshi、Shibata Tomoyuki、Yoshikawa Masako、Arai Shoji、Nauchi Rie、Tamura Akihiro
    • Journal Title

      Solid Earth

      Volume: 11 Issue: 1 Pages: 23-36

    • DOI

      10.5194/se-11-23-2020

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Tokoro Belt (NE Hokkaido): an exhumed, Jurassic ? Early Cretaceous seamount in the Late Cretaceous accretionary prism of northern Japan2019

    • Author(s)
      Sakai Shunta、Hirano Naoto、Dilek Yildirim、Machida Shiki、Yasukawa Kazutaka、Kato Yasuhiro
    • Journal Title

      Geological Magazine

      Volume: - Issue: 1 Pages: 72-83

    • DOI

      10.1017/s0016756819000633

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Petit-spot volcanoes on the oldest portion of the Pacific plate2019

    • Author(s)
      Hirano Naoto、Machida Shiki、Sumino Hirochika、Shimizu Kenji、Tamura Akihiro、Morishita Taisei、Iwano Hideki、Sakata Shuhei、Ishii Teruaki、Arai Shoji、Yoneda Shigekazu、Danhara Tohru、Hirata Takafumi
    • Journal Title

      Deep Sea Research Part I: Oceanographic Research Papers

      Volume: 154 Pages: 103142-103142

    • DOI

      10.1016/j.dsr.2019.103142

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Rare earth elements and yttrium (REY) variability with water depth in hydrogenetic ferromanganese crusts2018

    • Author(s)
      K. Azami, N.Hirano, S. Machida, K. Yasukawa, Y. Kato
    • Journal Title

      Chemical Geology

      Volume: 493 Pages: 224-233

    • Related Report
      2018 Research-status Report
    • Peer Reviewed
  • [Journal Article] Direct ascent to the surface of asthenospheric magma in a region of convex lithospheric flexure2017

    • Author(s)
      Sato Yuki、Hirano Naoto、Machida Shiki、Yamamoto Junji、Nakanishi Masao、Ishii Teruaki、Taki Arashi、Yasukawa Kazutaka、Kato Yasuhiro
    • Journal Title

      International Geology Review

      Volume: - Issue: 10 Pages: 1-13

    • DOI

      10.1080/00206814.2017.1379912

    • Related Report
      2018 Research-status Report 2017 Research-status Report
    • Peer Reviewed
  • [Journal Article] Garnet xenocryst from petit-spot lavas as an indicator for off-axis mantle refertilization at intermediate spreading ridges2017

    • Author(s)
      L. Rochat、S. Pilet、O. Muntener、T. Duretz、L. Baumgartner、N. Abe、 N. Hirano
    • Journal Title

      Geology

      Volume: 45 Issue: 12 Pages: 1091-1094

    • DOI

      10.1130/g39427.1

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Electrical conductivity of old oceanic mantle in the northwestern Pacific I: 1-D profiles suggesting differences in thermal structure not predictable from a plate cooling model2017

    • Author(s)
      Baba Kiyoshi、Tada Noriko、Matsuno Tetsuo、Liang Pengfei、Li Ruibai、Zhang Luolei、Shimizu Hisayoshi、Abe Natsue、Hirano Naoto、Ichiki Masahiro、Utada Hisashi
    • Journal Title

      Earth, Planets and Space

      Volume: 69 Issue: 1 Pages: 111-111

    • DOI

      10.1186/s40623-017-0697-0

    • NAID

      120006358589

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Geochemical/Petrological Interactions between Subducting Lithosphere and Petit-spot Magmas2017

    • Author(s)
      平野直人
    • Journal Title

      Journal of Geography (Chigaku Zasshi)

      Volume: 126 Issue: 2 Pages: 195-206

    • DOI

      10.5026/jgeography.126.195

    • NAID

      130005696806

    • ISSN
      0022-135X, 1884-0884
    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Petit-spot as definitive evidence for partial melting in the asthenosphere caused by CO22017

    • Author(s)
      Machida Shiki、Kogiso Tetsu、Hirano Naoto
    • Journal Title

      Nature Communications

      Volume: 8 Issue: 1 Pages: 14302-14302

    • DOI

      10.1038/ncomms14302

    • NAID

      120005971001

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] Geochemical and geological implications of in-situ basalts and petit-spot basalts since Late Cretaceous accretionary complexes in Japan2019

    • Author(s)
      Sakai Shunta, Hirano Naoto, Machida Shiki
    • Organizer
      AGU Fall Meeting 2019, T54B-05
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Petit-spot and seamount rejuvenation overprinting western Pacific plate2019

    • Author(s)
      Hirano Naoto, Sumino Hirochika
    • Organizer
      AGU Fall Meeting 2019, V11E-0142
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Petit-spot submarine volcanoes as a geological perturbation of subducting plate2019

    • Author(s)
      Hirano Naoto, Yutani Taku, Sakai Shunta
    • Organizer
      2019 GSA Annual Meeting, 214-13
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Is mantle upwelling required to produce intraplate magma ? -The counter example of petit-spot volcanoes2019

    • Author(s)
      Sebastien Pilet, Naoto Hirano
    • Organizer
      EGU General Assembly 2019, Geophysical Research Abstracts 21, EGU2019-9408
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Geochemical variations of the asthenosphere inferred from the geochemistry of petit-spot lavas in the NW Pacific plate2019

    • Author(s)
      桂木悠希, 平野直人, 清水健二, Rodriguez Fidel, Oalmann Jeffrey, 油谷拓
    • Organizer
      日本地球惑星科学連合2019年大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] アセノスフェア組成の探究:新青丸KS-18-9航海による「直プチ」調査2019

    • Author(s)
      平野直人, 油谷拓, 桂木悠希, Oalmann Jeffrey, Rodriguez Fidel
    • Organizer
      日本地球惑星科学連合2019年大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] アセノスフェアから速やかに上昇したプチスポット「直プチ」調査2019

    • Author(s)
      平野直人
    • Organizer
      ブルーアース・サイエンス・テク2019
    • Related Report
      2018 Research-status Report
  • [Presentation] Directly ascending asthenospheric melt erupted atop outer rise: the preliminary report of cruise KS-18-09, R/V Shinsei2018

    • Author(s)
      Naoto Hirano, Shiki Machida, Shipboard Scientific Party KS-18-9
    • Organizer
      AGU Fall Meeting 2018
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Volatile composition of asthenosphere below NW Pacific lithosphere revealed by petit-spot basalt2018

    • Author(s)
      Yuki Katsuragi, Naoto Hirano, Yuki Sato, Kenji Shimizu
    • Organizer
      AGU Fall Meeting 2018
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Submarine Petit-Spot Volcanoes Induced by the Plate Flexure Prior to Subduction2018

    • Author(s)
      Naoto Hirano
    • Organizer
      Submarine Volcanoes: Windows into Earth's Dynamic Interior, International Symposium at National Museum of Nature and Science.
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] H2O/F ratios in asthenosphere inferred from volatile compositions of petit-spot lavas2018

    • Author(s)
      Yuki Katsuragi, Naoto Hirano, Yuki Sato, Kenji Shimizu
    • Organizer
      JpGU 2018
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Sr isotope ratios identify origins of detrital materials in ferromanganese crusts: implication for tectonic and climatic impacts to submarine environment2018

    • Author(s)
      浅見慶志朗・平野直人・木村純一
    • Organizer
      日本地球惑星科学連合2018年大会
    • Related Report
      2018 Research-status Report
  • [Presentation] Missing carbonate and petit-spot silicate liquid immiscibility2018

    • Author(s)
      佐藤勇輝・平野直人
    • Organizer
      日本地球惑星科学連合2018年大会
    • Related Report
      2018 Research-status Report
  • [Presentation] Mantle compositions below petit-spot volcanoes of the NW Pacific Plate2017

    • Author(s)
      Naoto Hirano
    • Organizer
      2017 Fall Meeting, American Geophysical Union
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] Accretionary records on Japanese archipelago, NW Pacific rim2017

    • Author(s)
      Naoto Hirano
    • Organizer
      2017 Annual Meeting, Geological Society of America
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] Structure of asthenosphere interpreted by submarine petit-spot volcanoes2017

    • Author(s)
      Yuki Sato、Naoto Hirano
    • Organizer
      14th Annual Meeting, Asia Oceania Geosciences Society
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] Origin of diagenetic signal in hydrogenetic ferromanganese crusts from petit-spot volcanoes2017

    • Author(s)
      Keishiro Azami、Naoto Hirano、Takahashi、Watanabe
    • Organizer
      14th Annual Meeting, Asia Oceania Geosciences Society
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] Metasomatic records of lithosphere prior to subduction inferred from petit-spot2017

    • Author(s)
      Naoto Hirano、Yuki Sato、Arashi Taki
    • Organizer
      JpGU-AGU Joint Meeting
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Existence of CO2-rich melt in the asthenosphere evidenced by petit-spot2017

    • Author(s)
      Shiki Machida、Tetsu Kogiso、Naoto Hirano
    • Organizer
      JpGU-AGU Joint Meeting
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 最古の太平洋プレート上に存在する南鳥島の地質学的意義2017

    • Author(s)
      平野直人、河野尊臣、森下泰成、角野浩史
    • Organizer
      日本地質学会第124年学術大会, 2017年愛媛大会
    • Related Report
      2017 Research-status Report
  • [Presentation] Direct-ascended petit-spot magma from asthenosphere with little or no assimilation2017

    • Author(s)
      佐藤勇輝、平野直人
    • Organizer
      日本地球惑星科学連合2017年大会
    • Related Report
      2017 Research-status Report
  • [Presentation] 超深海における海水起源鉄マンガンクラストのREY組成2017

    • Author(s)
      浅見慶志朗、平野直人、町田嗣樹、安川和孝、加藤泰浩
    • Organizer
      日本地球惑星科学連合2017年大会
    • Related Report
      2017 Research-status Report

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Published: 2017-04-28   Modified: 2022-02-22  

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