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DIFFUSION, REACTION AND FLOW PHENOMENA RELATED TO PATTERN FORMATION IN ROCKS

Research Project

Project/Area Number 11304038
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section一般
Research Field Petrology/Mineralogy/Science of ore deposit
Research InstitutionKUMAMOTO UNIVERSITY

Principal Investigator

NISHIYAMA Tadao  KUMAMOTO UNIVERSITY, DEPARTMENT OF SCIENCE, PROFESSOR, 理学部, 教授 (10156127)

Co-Investigator(Kenkyū-buntansha) ISOBE Hiroshi  KUMAMOTO UNIVERSITY, DEPARTMENT OF SCIENCE, ASSOCIATE PROFESSOR, 理学部, 助教授 (80311869)
尾崎 正陽  熊本大学, 理学部, 助教授 (50040118)
Project Period (FY) 1999 – 2001
Project Status Completed (Fiscal Year 2001)
Budget Amount *help
¥37,520,000 (Direct Cost: ¥37,100,000、Indirect Cost: ¥420,000)
Fiscal Year 2001: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2000: ¥16,100,000 (Direct Cost: ¥16,100,000)
Fiscal Year 1999: ¥19,600,000 (Direct Cost: ¥19,600,000)
Keywordsserpentinite seamounts / diapir / diffusion / granite / melt / メルト / 拡散係数 / 双曲型成長則 / 蛇紋岩 / 海山 / 高圧変成岩 / 伊豆マリアナ弧 / 多成分拡散 / 濃度依存性 / 累帯構造 / 本質レンズ / 火砕流堆積物 / 気相晶出作用 / 物質移動
Research Abstract

(1) Modeling of serpentine diapir
Serpentine seamounts which occur in the Izu - Ogasawara- Mariana forearcs are modeled as serpentine diapir from the wedge mantle. The time and space scale of the development of seamounts were discussed based on observations and modeling. Serpentinization of the bottom layer of the wedge mantle due to diffusive supply of SiO2 and H2O is assumed. The thickness of the serpentinized layer is estimated to be the order of 10 meters by employing theory of diapir formation using the relation between the spacing of diapirs and viscosity ratio of serpentinite and the mantle.
(2) Melting experiments in granitic system and measurements of diffusion coefficients in the granitic melts.
Non-equilibrium melting experiments at temperatures above the eutectic point were carried out in granitic system to simulate natural melting phenomena in migmatite experimentally. Thin melt layers were formed between melting couples such as albite single crystal and quartz powder. The thickness of the melt layer obeys the parabolic growth rate law, suggesting diffusion limited growth of the layer. Diffusion coefficient of the slowest component (rate - determining component ) is estimated by the parabolic growth rate law.

Report

(4 results)
  • 2001 Annual Research Report   Final Research Report Summary
  • 2000 Annual Research Report
  • 1999 Annual Research Report
  • Research Products

    (6 results)

All Other

All Publications (6 results)

  • [Publications] 坂野昇平, 鳥海光弘, 小畑正明, 西山忠男: "岩石形成のダイナミクス"東京大学出版会. 304 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] S. Banno, M. Toriumi, M. Obata and T. Nishiyama: "Dynamics in Petrogenesis"University of Tokyo Press. 304 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] 坂野昇平,鳥海光弘,小畑正明,西山忠男: "岩石形成のダイナミクス"東京大学出版会. 304 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] 西山忠男 他(分担執筆): "形の科学事典"朝倉書店(印刷中).

    • Related Report
      2000 Annual Research Report
  • [Publications] 西山 忠男: "ザクロ石中の拡散と変成作用の時間スケール"地学雑誌. 108・2. 132-149 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] 坂野昇平・鳥海光弘・小畑正明・西山忠男: "岩石形成のダイナミクス"東京大学出版会. 320 (2000)

    • Related Report
      1999 Annual Research Report

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Published: 1999-04-01   Modified: 2016-04-21  

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