Constitutive properties for the shear failure of intact granite in seismogenic environments

DOI Web Site Web Site 被引用文献6件
  • Aitaro Kato
    Earthquake Prediction Research Center, Earthquake Research Institute The University of Tokyo Tokyo Japan
  • Mitiyasu Ohnaka
    Earthquake Prediction Research Center, Earthquake Research Institute The University of Tokyo Tokyo Japan
  • Hiromine Mochizuki
    Earthquake Prediction Research Center, Earthquake Research Institute The University of Tokyo Tokyo Japan

書誌事項

公開日
2003-01
権利情報
  • http://onlinelibrary.wiley.com/termsAndConditions#vor
DOI
  • 10.1029/2001jb000791
公開者
American Geophysical Union (AGU)

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説明

<jats:p>To investigate how the parameters prescribing the slip‐dependent constitutive law are affected by seismogenic environments, we conducted a series of triaxial fracture experiments using intact Tsukuba‐granite samples, which were deformed at wet, temperature‐pressure conditions that correspond to a crustal depth range down to 15 km at a strain rate of 10<jats:sup>−5</jats:sup>/s. It is conclusively demonstrated that the critical slip displacement <jats:italic>D</jats:italic><jats:sub>c</jats:sub> is virtually constant at the conditions of depths shallower than 10 km, and that <jats:italic>D</jats:italic><jats:sub>c</jats:sub> increases with increasing depth at depths greater than 10 km, because of the effect of temperature in the brittle‐plastic transition regime. The breakdown stress drop for intact rock is found to be roughly constant (100 MPa) in a depth range down to 15 km. The apparent fracture energy increases with increasing depth at depths greater than 10 km. These results consistently lead to the conclusion that the stability of the breakdown process is enhanced at depths greater than 10 km.</jats:p>

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