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Evolution of layered convection system and mantle dynamics

Research Project

Project/Area Number 14340129
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field 固体地球物理学
Research InstitutionThe University of Tokyo

Principal Investigator

KURITA Kei  The University of Tokyo, Earthquake Research Institute, Professor, 地震研究所, 教授 (00111451)

Project Period (FY) 2002 – 2004
Project Status Completed (Fiscal Year 2004)
Budget Amount *help
¥14,300,000 (Direct Cost: ¥14,300,000)
Fiscal Year 2004: ¥1,400,000 (Direct Cost: ¥1,400,000)
Fiscal Year 2003: ¥1,800,000 (Direct Cost: ¥1,800,000)
Fiscal Year 2002: ¥11,100,000 (Direct Cost: ¥11,100,000)
Keywordsmantle / tomography / convection / plume / temperature measurement / PIV / マントルダイナミクス / 組成プルーム / マントル対流 / 地震トモグラフィー / 取り込み / ホットスポット / 大陸の分裂 / 熱対流 / 層状対流 / マントル進化 / 層構造の崩壊 / PTV / 温度場計測 / 流体実験 / 組成対流 / LIF計測 / 多層対流 / D"層
Research Abstract

The dynamics of mantle is driven by heterogeneity of temperature and composition. The region of higher temperature gains thermal buoyancy and the region with high Fe content gains negative buoyancy. The dynamics of the Earth's mantle is characterized by thermo-chemical convection system. In this research interaction of thermal convection with density-stratified layered structure has been investigated. Density-stratified layered structure is one of the typical situation of heterogeneity of chemical composition.
Laboratory fluid experiments are conducted to pursue this subject. Localized heat source at the base of fluid layer generates thermal plume, which interacts with the layered structure. We investigated various modes of interaction. Since the chemical composition and the temperature are two important factors we developed reliable measurement system for these two parameters. Te simultaneous measurement syst for velocity field(PIV), temperature field(microcapsule of TLC) and compositional field(LIF) are successfully constructed. Three major experimental series are analyzed by this research grant ; 1) Interaction of thermal plume with layered structure during ascent, 2)formation of plume in layerd structure, and 3)thermal instability of sedimentating system.
Particularly in the formation of plume in layered system several new phenomena have been clarified. Depending on the nature of the layered structure (ex. Density contrast and thickness of the base layer) three types of plume are found. ; successful plume, decoupled plume and failed plume. In the Earth's mantle the nature of the layered structure favors formation of failed plume. The failed plume is important in the interpretation of seismic tomography data because it would shed light on our overlooking at the chemical nature of the plume.

Report

(4 results)
  • 2004 Annual Research Report   Final Research Report Summary
  • 2003 Annual Research Report
  • 2002 Annual Research Report
  • Research Products

    (19 results)

All 2004 2003 2002 Other

All Journal Article (10 results) Book (2 results) Publications (7 results)

  • [Journal Article] Evolution of Cooling Earth2004

    • Author(s)
      K.Kurita
    • Journal Title

      Evolving Earth & Planetary System Chap.4 (ed.by Group of Earth & Planetary Systems of Univ.of Tokyo) (in Japanese)

      Pages: 52-69

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] 火星の地形のまとめと水の歴史2004

    • Author(s)
      小川佳子, 栗田敬
    • Journal Title

      日本惑星科学会誌 13・3

      Pages: 124-136

    • NAID

      110003320367

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Heat Transfer and interfacial temperature of two layered convection2003

    • Author(s)
      A.Namiki, K.Kurita
    • Journal Title

      Geophys.res.Lett. 30

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Evaluation of melting process of permafrost on Mars2003

    • Author(s)
      Y.Ogawa, K.Kurita, Y.Yamagishi
    • Journal Title

      J.Geophys.Res. 108E

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] エウロパ内部2003

    • Author(s)
      木村淳, 栗田敬
    • Journal Title

      惑星科学会誌 12

      Pages: 133-143

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Heat transfer and interfacial temperature of two layer convection2003

    • Author(s)
      Namiki, K.Kurita
    • Journal Title

      Geophys.Res.Lett. 30

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Evaluation of melting process of permafrost on Mars2003

    • Author(s)
      Y.Ogawa, K.Kurita, Y.Yamasgishi
    • Journal Title

      J.Geophys.Res. 108E

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] The Interior of Europa2003

    • Author(s)
      Kimura, A., K.Kurita
    • Journal Title

      Wakusei Kagaku Kaishi 12(in Japanese)

      Pages: 133-143

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Rayleigh-Benard convection with inclined upper boundary2002

    • Author(s)
      A.Namiki, K.Kurita
    • Journal Title

      Phys.Rev.E 65

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Rayleigh-Benard convection with inclined upper boundary2002

    • Author(s)
      A.Namiki, K.Kurita
    • Journal Title

      Phys.Res.E 65

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Book] 冷却する地球の進化(進化する地球惑星システム 第4章)2004

    • Author(s)
      東京大学地球惑星システム科学講座
    • Total Pages
      236
    • Publisher
      東京大学出版会
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Book] 「冷却する地球の進化」進化する地球惑星システム 第4章 52-702004

    • Author(s)
      東京大学地球惑星システム科学講座編(分担)
    • Total Pages
      236
    • Publisher
      東京大学出版会
    • Related Report
      2004 Annual Research Report
  • [Publications] A.Namiki, K.Kurita: "Heat transfer and interfacial temperature of two layered convection"Geophys Res Lett.. 30・1. 1029-1-1029-4 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] Y.Ogawa, Y.Yamagishi, K.Kurita: "Evaluation of melting process of the permafrost on Mars"J.Geophys.Res.. 108・E4. 27-1-27-12 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] 久利, 栗田: "十和田火山二の倉スコリア群の層序区分の再検討"火山. 48. 249-258 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] 木村, 栗田: "エウロパ内部を表面をみる"日本惑星科学会誌. 12・3. 133-143 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] A.Namiki, K.Kurita: "Rayleigh-Benard convection with an inclined upper boundary"Physical.Review E. 65. 056301-1-056301-10 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] A.Namiki, K.Kurita: "Heat transfer and interfacial temperature of two-layered convection"Geophys.Res.Lett.. 30. 23-1-23-4 (2003)

    • Related Report
      2002 Annual Research Report
  • [Publications] Y.Ogawa, Y.Yamagishi, K.Kurita: "Evaluation of melting process of the permafrost on Mars"J.Geophys.Res.E. 108. 1886-1-1886-8 (2003)

    • Related Report
      2002 Annual Research Report

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Published: 2002-04-01   Modified: 2016-04-21  

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