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The rate of dehydration of the stagnant slab in the mantle transition zone

Research Project

Project/Area Number 16K13900
Research Category

Grant-in-Aid for Challenging Exploratory Research

Allocation TypeMulti-year Fund
Research Field Petrology/Mineralogy/Economic geology
Research InstitutionHokkaido University

Principal Investigator

Kuritani Takeshi  北海道大学, 理学研究院, 准教授 (80397900)

Project Period (FY) 2016-04-01 – 2018-03-31
Project Status Completed (Fiscal Year 2017)
Budget Amount *help
¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2017: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2016: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywordsマグマ / 水循環 / マントル遷移層 / 停滞スラブ / プレート内火成活動 / 地殻・マントル物質 / 火山
Outline of Final Research Achievements

Geophysical observation has suggested that the mantle transition zone beneath NE China is hydrous, and the subducted Pacific slab is stagnated in the transition zone. To estimate the rate of the dehydration of the stagnant slab, petrological and geochemical analyses were conducted on volcanic rocks of variable ages (60-0 Ma) above the stagnant slab. Unfortunately, the rate of the dehydration could not have been estimated because of no significant temporal variation in the water contents of the source mantle. However, this study showed that the mantle transition zone have been hydrous between 60 and 0 Ma. In addition, this study proposed a general model about the origin of the intraplate magmatism over the stagnant slab.

Report

(3 results)
  • 2017 Annual Research Report   Final Research Report ( PDF )
  • 2016 Research-status Report
  • Research Products

    (7 results)

All 2017 Other

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

  • [Int'l Joint Research] 浙江大学/中国科学技術大学(中国)

    • Related Report
      2016 Research-status Report
  • [Journal Article] Mantle hydration and the role of water in the generation of large igneous provinces.2017

    • Author(s)
      Liu, J., Xia, Q.-K., Kuritani, T., Hanski, E. and Yu, H.-R.
    • Journal Title

      Nature Communications

      Volume: 8 Issue: 1 Pages: 1824-1824

    • DOI

      10.1038/s41467-017-01940-3

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Fluid-fluxed melting of mantle versus decompression melting of hydrous mantle plume as the cause of intraplate magmatism over a stagnant slab: implications from Fukue Volcano Group, SW Japan2017

    • Author(s)
      Kuritani, T., Sakuyama, T., Kamada, N., Yokoyama, T., Nakagawa, M.
    • Journal Title

      Lithos

      Volume: 282-283 Pages: 98-110

    • DOI

      10.1016/j.lithos.2017.02.011

    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Presentation] Fluid-fluxed melting of the mantle as the cause of intraplate magmatism over a stagnant slab: implications from Fukue Volcano Group, SW Japan2017

    • Author(s)
      Kuritani, T., Sakuyama, T., Kamada, N., Yokoyama, T., Nakagawa, M.
    • Organizer
      JPGU-AGU Joint Meeting 2017
    • Place of Presentation
      Makuhari, Chiba
    • Year and Date
      2017-05-20
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Presentation] Fluid-fluxed melting of the mantle as the cause of intraplate magmatism over a stagnant slab: implications from Fukue Volcano Group, SW Japan2017

    • Author(s)
      Kuritani, T., Sakuyama, T., Kamada, N., Yokoyama, T., Nakagawa, M.
    • Organizer
      JpGU2017
    • Related Report
      2017 Annual Research Report
  • [Presentation] Fluid-fluxed melting of the mantle as the cause of intraplate magmatism over a stagnant slab: evidence from Fukue Volcano Group, SW Japan2017

    • Author(s)
      Kuritani, T., Sakuyama, T., Kamada, N., Yokoyama, T., Nakagawa, M.
    • Organizer
      Goldschmidt Conference
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 長崎県五島列島・小値賀島火山群の玄武岩質噴出物の地球化学的研究2017

    • Author(s)
      栗谷豪、中川光弘
    • Organizer
      日本地質学会2017愛媛大会
    • Related Report
      2017 Annual Research Report

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Published: 2016-04-21   Modified: 2019-03-29  

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