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Experimental research of rock fracture and flow under the earth's crustal environament.

Research Project

Project/Area Number 04452065
Research Category

Grant-in-Aid for General Scientific Research (B)

Allocation TypeSingle-year Grants
Research Field 経済事情及び政策学
Research InstitutionKYOTO UNIVERSITY

Principal Investigator

YUKUTAKE Hideo  Kyoto Univ.Disaster Preven.Res.Inst.Associate Professor, 防災研究所, 助教授 (90101237)

Co-Investigator(Kenkyū-buntansha) SHIMADA M  Kyoto Univ.Disaster Preven.Res.Inst.Professor, 防災研究所, 教授 (60025369)
Project Period (FY) 1992 – 1993
Project Status Completed (Fiscal Year 1993)
Budget Amount *help
¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 1993: ¥500,000 (Direct Cost: ¥500,000)
KeywordsSeismic generative zone / lower crust / physic-chemical effect / Dry sample / Water-Saturated sample / Acoustic emission / Brittle fracture / Semi-brittle flow / 水の化学作用 / 地殻の温度・圧力 / 長時間実験 / 流動と破壊 / 地殻の強度 / 応力腐食破壊 / 破壊核の形成 / 弾性波速度 / 水の効果
Research Abstract

During the last ten years, attention has been focused seismic generative zones in which earthquakes are centered 10-15 km below the surface of the crust. There is no doub that the mechanisms which cause earthquakes strongly depend on the physical and chemical properties of rocks in the crustal environment. There has been little practical research related to rock fracture, frictional sliding, and deformation which was conducted under these environmental conditions.
We have performed a experiment of rock fracture and flow under high pressure and temperature (0.8GPa and 400 C) using a novel triaxial testing apparatus to study the mechanism of earthquake ocurrence in the lower crust. In this year, in order to investigate the physic-chemical effect due to the existence of water in the lower crust we made the experiment for both of dry and water-satulated samples for more than a few days by a servo-controled system, and measured AE (Acoustic Emission) emitted in a sample by a PZT sensor. In the case of dry sample AE rarely ocurred until the 98% of peak stress at the temperature of 370 C and pressure of 100 MPa, and then many of AE were generated before ultimate fracture. In the case of saturated sample, AE rarely occured until peak stress at the temperature of more than 300 C and pressure of 100 MPa. However, brittle fractured took place ultimately in producing many AE.This result suggests that semi-brittle region may exist in the lower crust.

Report

(3 results)
  • 1993 Annual Research Report   Final Research Report Summary
  • 1992 Annual Research Report
  • Research Products

    (23 results)

All Other

All Publications (23 results)

  • [Publications] H.Yukutake: "Fracture necleation process in infack rocks" Tectonophysics. 211. 247-257 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] 行竹英雄: "震源域におけるクラップの発生に伴う破壊の核・形成" 地震. 45. 107-117 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] M.Shimada: "Lithusphere strength inferred from the fraoture strength of rocks at high confining pressure and temperature" Tectonophysics. 217. 55-64 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] M.Shimada: "Two types of brihee fracture of silicatc rocks and scale effect on rock strengfh:Their implications in the earth's crust." Procee.Seoond Inten.Warkshop Scale Eoffects in Rock Mass,Lisbon 1993. 2. 55-62 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] 島田充彦: "岩石の再" 第9回岩の力学国内シンポジウム講演論文集. 9. 455-460 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] H.Yukutake: "A novel triaxial testing apparatas for rock fracture,friction and deformatrom at high pressure and temperature" Int.J.Rock Mech.Min.Sci.& Geomech.Abatr.(発表予定). (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Yukutake, H.: "Fracture nucleation process in intact rocks" Tectonophysics. 211. 247-257 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Yukutake, H.: "Fracture nucleation due to occurrence of cracks in a seismic source region" J.Seismol.Soc.Japan.107-117 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Shimada, M.: "Experimental earthquake prediction" The Earth Monthly.Extra. Vol.4. 168-173 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Shimada, M.: "Lithosphere strength inferred from the fracture strength of rocks at high confining pressure and temperature" Tectonophysics. 217. 55-64 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Shimada, M.: "Two types of brittle fracture of silicate rocks and scale effect on rock strength : Their implications in the earth scrust." Proce.Second Inter.Warkshop Scale Effects in Rock Mass.Lisbon. (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Shimada, M.: "On the high pressure embrittlement of rocks" Proce.9th Japan Sympo.on Rock Mech.(1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] H.Yukutake: "Fracture Nucleation Process in Intack Rocks" Tectonophysics. 211. 247-257 (1992)

    • Related Report
      1993 Annual Research Report
  • [Publications] 行竹英雄: "震源域におけるクラックの発生に伴う破壊の核形成" 地震. 45. 107-117 (1992)

    • Related Report
      1993 Annual Research Report
  • [Publications] M.Shimada: "Lithosphere Strength Inferred from the fracture strength of racks at high confining pressure and temperature" Tectonophysics. 217. 55-64 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] M.Shimada: "Two types of brittle fracture of silicate Rocks and scale effect on Rock strengrh:Their implications in the eart's erust" Procee.Second Inter.Warkshop Scale effects in Rock Mass,Lisbon 1993. 2. 55-62 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] 島田充彦: "岩石の高圧再脆性化について" 第9回岩の力学国内シンポジウム講演論文集. 9. 455-460 (1994)

    • Related Report
      1993 Annual Research Report
  • [Publications] H.Yukutake: "A novel triaxial testing apparatus for rock fraoture,friction and deformation at high pressure and temperature" Int.J.Rock Mech.Min.Sci.& Greomech Abstr.(発表予定).

    • Related Report
      1993 Annual Research Report
  • [Publications] 島田 充彦: "実験地震予知" 月刊地球. 号外No4. 168-173 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] H.Yukutake: "Fracture Nucleation Process in Fntact Rocks" Tectonophysics. 211. 247-257 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] M.Shimada: "Confirmation of Two Types of Fracture in Granite Deformed at Temperature to 300℃" Tectonophysics. 211. 259-268 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] 行竹 英雄: "震源域におけるクラックの発生に伴う破壊の核形成" 地震. 45. 107-117 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] M.Shimada: "Lithosphere Strength Infferred from the Fracture Strength of Rocks at High Confining Pressure and Temperatare" Tectonophysics. 217. 55-64 (1993)

    • Related Report
      1992 Annual Research Report

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Published: 1993-04-01   Modified: 2016-04-21  

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