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PHEOLOGY OF SOLID MATERIALS OF DEEP EARTH'S INTERIOR

Research Project

Project/Area Number 03302024
Research Category

Grant-in-Aid for Co-operative Research (A)

Allocation TypeSingle-year Grants
Research Field 鉱物学(含岩石・鉱床学)
Research InstitutionUNIVERSITY OF TOKYO

Principal Investigator

TORIUMI Mitsuhiro  University of Tokyo,Faculty of Science,Professor, 理学部, 教授 (10013757)

Co-Investigator(Kenkyū-buntansha) KITAMURA Masao  Kyoto University Faculty of Science,Associate Professor, 理学部, 助教授 (70004489)
TAKESHITA Toru  Ehime University,Faculty of Science,Associate Professor, 理学部, 助教授 (30216882)
FUJII Toshitugu  University of Tokyo,Earthquake Research Institute,Professor, 地震研究所, 教授 (00092320)
SHIMAMOTO Toshihiko  University of Tokyo,Earthquaki Research Institute,Associate Professor, 地震研究所, 助教授 (20112170)
藤野 清志  愛媛大学, 理学部, 助教授 (40116968)
Project Period (FY) 1991 – 1992
Project Status Completed (Fiscal Year 1992)
Budget Amount *help
¥4,500,000 (Direct Cost: ¥4,500,000)
Fiscal Year 1992: ¥2,000,000 (Direct Cost: ¥2,000,000)
Fiscal Year 1991: ¥2,500,000 (Direct Cost: ¥2,500,000)
Keywordsrheology / high pressure minerals / dislocation / parallel computer / garnet / brittle-ductile transition / molecular dynamics / flow law / 高圧鉱物 / 結晶転位 / レオロジィ / 地球内部 / 超高圧 / 分子動力学
Research Abstract

Main theme of this group research on rheology of the Earth's interior are focused on studying physical mechanisms of plastic and brittle deformation of minerals and rocks. Since 1970,rheology of planetary and Earth's materials has been investigated experimentally. Recent precise experiments on this subject began to perform from 1978 at MIT,ANU,UCSA and UT(Karato and Toriumi). Furthermore,in the brittle field frictional slip behavior were determined exactly by Texas AM(Logan and Shimamoto). Shimamoto(1986) proposed shear instability in the brittle-ductile transition regime. After these experimental investigations,hot discussions proposed are summarized as follows;rheology of ultrahigh pressure minerals,pressure-dependence of flow law,hydrolytic weakening of minerals, Plastic and frictional instability,constituitive law of materials in the brittle-ductile transition regime, rheology of polyphase and polycrystallinc aggregates.
In the study of this grant-in-aid we conducted deformation mec … More hanisms of ultrahigh pressure minerals such as garnet and make a simulator of molecular dynamics dislocation motion and computer simulation of polyphase and polycrystalline aggregates. By this investigations introduction of crystal dislocation requires for very long cpu times of very fast super computer. For examples,1000 particles MD simulations need 12.5 seconds per 1 step even by 100 Mflops(double)cpu. Thus,we made a new type special backend computer equiped on microcomputer which is composed of parallel-connected 5(6) transputers(T800 of INMOS,England). The ability of this backend parallel computer is about 10 Mflops and 100 Mips. Language for simulation is parallel fortran of 3L company. This backend machine can be applied to simulate the polyphase flow.
Rheology of garnet is quite important to infer the nature of transition layer of upper and lower mantle. We proposed very hard rhcology of garnet due to very slow velocity coming from expanded dislocations in garnet which were assigned by TEM. Garentite formed under 10-16GPa and 1600 C indicated a great contrast of rhcology between small amount of pyroxene and stishovite,and majority garnet.
To get a natural data derived from many studies of lower crust metamorphism and tectonics of subduction and collision zones,we convened the workshop of Precise determination of P T t paths of metamorphic rocks involving deformation and reaction at Matsue. The workshop was very excited and successful. It is clarified that reaction and deformation is interlocked with each other. Less

Report

(3 results)
  • 1992 Annual Research Report   Final Research Report Summary
  • 1991 Annual Research Report
  • Research Products

    (24 results)

All Other

All Publications (24 results)

  • [Publications] M.Toriumi: "The transition from brittle defomation in the Sambagawa metamorphic belt.J." Metamorphic Geol.,. 8. 457-466 (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] M Troiumi: "Cluster formation of Cr-spinel during magmatic differentiation in the upper mantle.Researches of Pattern Formation." Takaki R.,ed.,KTK Sci.Pub.(1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] M.Kitamura: "A cathodoluminescence microscope and its application to the sutdy of growth zoning of minerals." Mineralogical Journal. 16. 108-116 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] T.Shimamoto: "An argument against the crush origin of pseudotachylites based on the analysis of clast-size distribution." J.Structural geol.,. 14. 999-1006 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] H.Kern: "Characterization of the thermal and thermomechanical behaviour of polyphase salt rocks by means of electrical conductivity and permeability measurements." Tectonophysics. 213. 285-302 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] J.Ando: "Dislocation microstructures in naturally deformed silicate garnets." PEPI. (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] M.TORIUMI: "The transition from brittle ductile deformation in the Sambagawa metamorphic belt.J." Metamorphic Geol.8. 457-466 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] M.TORIUMI: "Cluster formation of Cr-spinel during magmatic differentiation in the upper mantle. Researcher of Pattern Formation." Takaki R.,ed.,KTK Sci.PUB.(1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] Kitamura,M.,Fudaki,M.,Shwin,.K.,and Shimobayashi,N.: "A cathodoluminescence microscope and its application to the study of growth zoning of minerals." Mineralogical Journal. 16. 108-116 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] Shimamoto,T.,and Nagahama,H.: "An argument against the crush origin of pseudotachylites based on the analysis of clast-size distribution." 14. 999-1006 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] Kern,H.,Popp,P.,and Takeshita,T.: "Characterization of the thermal and thermomechanical behavior of polyphase salt rocks by means of electrical conductivity and gas permeability measurements." Tectonophysics. 213,285-302. (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] ANDO,J,Fujino,K and Takeshita,T: "Dislocation microstructures in naturally deformed silicate garnets." PEPI. (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] ANDO,J,Fujino,K and Takeshita,T: "Dislocation microstructures in naturally deformed silicate garnets." PEPI. (1992)Structural geol.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] M.Toriumi: "The transition from brittle ductile defomation in the Sambagawa metamorphic belt.J." Metamorphic Geol.,. 8. 457-466 (1990)

    • Related Report
      1992 Annual Research Report
  • [Publications] M.Toriumi: "Cluster formation of Cr-spinel during magmatic differentiation in the upper mantle. Researches of Pattern Formation." Takaki R.,ed.,KTK Sci.Pub.(1991)

    • Related Report
      1992 Annual Research Report
  • [Publications] M.Kitamura: "A cathodluminescence microscope and its application to the study of growth zoning of minerals." Mineralogical Journal. 16. 108-116 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] T.Shimamoto: "An argument against the crush origin of pseudotchylites based on the analysis of clast-size distribution." J.Structural Geol.,. 14. 999-1006 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] H.Kern: "Characterization of the themal and thermomechanical behaviour of polyphase salt rocks by means of electrical conductivity and gas pemeability measurements." Tectonophysics. 213. 285-302 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] J.Ando: "Dislocation microstructures in naturally deformed silicate garnets." PEPI. (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] TORIOMI.M.: "Cluster formation of Cr‐Spivel duning moguatic differentiation in the oppen mantle" Res.Pattera Formation edi.Takaki. (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] 鳥海 光弘: "岩石学における革新的視座" 月刊地球. 13. 280-284 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] 鳥海 光弘: "3次元コ-ナ-流れと変成岩の温度・圧力履歴" 海洋. 23. 549-554 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] SHIMAMOTO T.,KANAORI Y,ASAI,K: "Cathodoluimines cence obsevvations on low‐temperature mylon.ies:Potential for detection of solution‐precipitation microstraove" Jounol Struel Geol.13. 967-973 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] 嶋本 利彦・長浜 裕幸: "シュ-ドタキライトの起源と地殼応力問題" 月刊地球. 13. 416-427 (1991)

    • Related Report
      1991 Annual Research Report

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Published: 1991-04-01   Modified: 2016-04-21  

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