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2012 Fiscal Year Final Research Report

Heterogeneity of subduction zone mantle: Towards geochemical tomography

Research Project

  • PDF
Project/Area Number 22244069
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section一般
Research Field Geochemistry/Astrochemistry
Research InstitutionTokyo Institute of Technology

Principal Investigator

IWAMORI Hikaru  東京工業大学, 大学院・理工学研究科, 教授 (80221795)

Co-Investigator(Kenkyū-buntansha) YOKOYAMA Tetsuya  東京工業大学, 理工学研究科, 准教授 (00467028)
HIRATA Takafumi  京都大学, 理学(系)研究科(研究院), 教授 (10251612)
NAKAMURA Hitomi  東京工業大学, 理工学研究科, 特任助教 (60572659)
Project Period (FY) 2010 – 2012
Keywords地殻 / マントル化学 / 沈み込み / 不均質
Research Abstract

We have successfully estimated the mantle isotopic compositions and their global distribution, based on the compositions of arc volcanic rocks, by evaluating the slab-derived components. A combined analysis with oceanic basalts has revealed for the first time the presence of east-west hemispherical structure: the mantle in the eastern hemisphere is enriched in subducted hydrophile components, being possibly brought into the mantle by focused subduction towards the supercontinent once existed in the eastern hemisphere, whereas that in the western hemisphere is not.

  • Research Products

    (12 results)

All 2013 2012 2011 2010

All Journal Article (9 results) (of which Peer Reviewed: 9 results) Presentation (2 results) Book (1 results)

  • [Journal Article] Generation of adakites in a cold subduction zone due to double subducting plates2013

    • Author(s)
      Nakamura, H., and Iwamori, H.
    • Journal Title

      Contrib. Mineral. Petrol.

      Volume: 165 Pages: 1107-1134

    • Peer Reviewed
  • [Journal Article] Fluid processes in subduction zones and water transport to the deep mantle. In2013

    • Author(s)
      Iwamori, H., and Nakakuki, T.
    • Journal Title

      Physics and Chemistry of the Deep Earth (ed. S. Karato)

      Pages: 446-468

    • Peer Reviewed
  • [Journal Article] Thermodynamic model for partial melting of peridotite by system energy minimization2013

    • Author(s)
      Ueki, K., and Iwamori, H.
    • Journal Title

      Geochem. Geophys. Geosys.

    • DOI

      doi:10.1029/2012GC004143.

    • Peer Reviewed
  • [Journal Article] 沈み込み帯での地殻流体の発生と移動のダイナミクス2012

    • Author(s)
      岩森光,中村仁美
    • Journal Title

      地学雑誌

      Volume: 121 Pages: 118-127

    • Peer Reviewed
  • [Journal Article] East-west mantle geochemical hemispheres constrained fromStagnant slab, wet plumes and Cenozoic volcanism in East Asia2012

    • Author(s)
      Iwamori, H., and Nakamura, H.
    • Journal Title

      Phys. Earth Planet. Inter

      Volume: 183 Pages: 280-287

    • Peer Reviewed
  • [Journal Article] スラブ起源流体と沈み込み帯でのマグマ生成2011

    • Author(s)
      中村仁美,岩森光
    • Journal Title

      地学雑誌

      Volume: 119 Pages: 1054-1062

    • Peer Reviewed
  • [Journal Article] Deep-sea mud in the Pacific Ocean as a potential resource for rare-earth elements2011

    • Author(s)
      Kato, Y., Fujinaga, K. Nakamura, K.,Takaya, Y., Kitamura, K., Ohta, J., Toda, R., Nakashima, T., and Iwamori, H.
    • Journal Title

      Nature Geoscience

      Volume: vol.4 Pages: 535-539

    • Peer Reviewed
  • [Journal Article] Global structure of mantle isotopic heterogeneity and its implications for mantle differentiation and convection2010

    • Author(s)
      Iwamori,H. Albarede, F., and Nakamura, H.
    • Journal Title

      Earth Planet. Sci. Lett

    • DOI

      doi:10.1016/j.epsl. 2010.09.014.

    • Peer Reviewed
  • [Journal Article] Stagnant slab, wet plumes and Cenozoic volcanism in East Asia.2010

    • Author(s)
      Richard, G.C., and Iwamori, H.
    • Journal Title

      Phys. Earth Planet. Inter

      Volume: 183 Pages: 280-287

    • Peer Reviewed
  • [Presentation] Mantle Compositional Variability Constrained from Arc and Oceanic Basalts2011

    • Author(s)
      Iwamori, H.
    • Organizer
      Goldschmidt Conference
    • Place of Presentation
      Prague
    • Year and Date
      2011-08-18
  • [Presentation] Fluid Processes in Subduction Zones and Global Water Circulation2011

    • Author(s)
      Iwamori, H.
    • Organizer
      Goldschmidt Conference
    • Place of Presentation
      Prague. (Keynote)
    • Year and Date
      2011-08-18
  • [Book] 沈み込み帯の物質循環とスラブ流体 宇宙と地球の科学事典2012

    • Author(s)
      中村仁美,岩森光
    • Total Pages
      228-229
    • Publisher
      朝倉書店

URL: 

Published: 2014-08-29  

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