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Chinese Journal of High Pressure Physics  > 2008  >  22(2): 167-174 .
SONG Juan, ZHOU Yong-Sheng, HE Chang-Rong. The Brittle-Plastic Transition in Experimentally Deformated Quartzite[J]. Chinese Journal of High Pressure Physics, 2008, 22(2): 167-174 . doi: 10.11858/gywlxb.2008.02.010
Citation: SONG Juan, ZHOU Yong-Sheng, HE Chang-Rong. The Brittle-Plastic Transition in Experimentally Deformated Quartzite[J]. Chinese Journal of High Pressure Physics, 2008, 22(2): 167-174 . doi: 10.11858/gywlxb.2008.02.010
shu

The Brittle-Plastic Transition in Experimentally Deformated Quartzite

doi: 10.11858/gywlxb.2008.02.010
  • 1.

    China University of Petroleum, Dongying 257061, China;

  • 2.

    State Key Laboratory of Earthquake Dynamics, Institute of Geology, China Earthquake Administration, Beijing 100029, China

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  • Corresponding author: ZHOU Yong-Sheng
  • Received Date: 20 Mar 2007
  • Rev Recd Date: 06 Aug 2007
  • Publish Date: 05 Jun 2008
    Abstract
  • Deformation experiments have been conducted to investigate the brittle-plastic transition of quartzite under temperature of 500~1 000 ℃ and confining pressure of 1 251~1 440 MPa. Mechanical behavior and microstructural characteristics indicated that the brittle-plastic transition of quartzite in experimental condition underwent three deformation mechanisms, namely the semibrittle faulting, semibrittle flow and plastic flow. At least two transitions of deformation mechanism were involved with increasing temperature. The first is the transition from semibrittle faulting to semibrittle flow at 700~800 ℃, and the second is the transition from semibrittle flow to plastic flow at 900~950 ℃. In comparison with the similar results reported by Hirth and Tullis (1994), the temperatures of two transitions we determined is higher by 100 ℃ than Hirth and Tullis' results. In addition, coesite was found in the thin section of severely deformed plastic flow samples.

     

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