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XU ZHONGHUAIup, GE SHUMOup2com sh . 1984: STRESS FIELD IN THE FUYUN, XINJIANG EARTHQUAKE FRACTURE ZONE DETERMINED BY FITTING FAULT SLIP VECTOR DATA. Acta Seismologica Sinica, 6(4): 395-404.
Citation: XU ZHONGHUAIup, GE SHUMOup2com sh . 1984: STRESS FIELD IN THE FUYUN, XINJIANG EARTHQUAKE FRACTURE ZONE DETERMINED BY FITTING FAULT SLIP VECTOR DATA. Acta Seismologica Sinica, 6(4): 395-404.
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STRESS FIELD IN THE FUYUN, XINJIANG EARTHQUAKE FRACTURE ZONE DETERMINED BY FITTING FAULT SLIP VECTOR DATA

  • 1. Institute of Geophysics, State Seismologkal Bureau; 2. Xinjiang Seismologkal Bureau

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  • Published Date: August 31, 2011
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    • Abstract
  • Based on the horizontal and vertical offset data of 42 faults obtained from field survey in the epiceutral zone, caused by the great 1931 Fuyun earthquake of magnitude 8, the slip directions on the fault planes are deduced. The mean stress fields corresponding to 4 segments, from north to south, of the fracture zone have been estimated by minimizing the angle between the calculated shear stress and the observed slip vector on each fault.The result indicates that for the 4 segments the maximum and minimum compressive principal stress axes are all horizontal, while the maximum compressive principal stress axes take approximately the azimuths between N15E to N30 E. The overall stress field in the entire fracture zone is rather homogeneous, this implies that the underline cause for the great Fuyun earthquake could hardly be some local factors, but possibly tectonic movement on a large scale.
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    • References (1)
  • [1] Bott, M. H.P., The mechanism of oblique slip faulting, Geological Magazine, 96, 2,109——117, 1959.

    [2] Angelier, J.Determination of the mean principal directions of Stresses for a given population, Tec——tonoplaysics, 56, T17——T26,1979.

    [3] Angelier, J., Inversion of field data in fault tectonics to obtain the regional stress—I.Single phase fault populations: a new method of computing the stress tensor, Geophys. J. R. astr.Soc.,69, 3, 607——622, 1982,

    [4] Etchecopar, A., G. Vasseur, M.Daignieres, An inverse problem in microtectonics for the determination of Stress tensors from fault striation analysis,J.Struct. Geol., 3, 1,51——55,1981.

    [5] Angelier, J. et Stratis Manoussis,Classification automatique et distinction des phases superposees en tectonique de failles, C. R. Acad. Sc. Paris, t. 290, Serie D,651——654, 1980.

    [6] Ellsworth, W. L., A general theory for determing the state of stress in the earth from fault slip measurements, Terra Cognita, 2, 2, 170——171, 1981.

    [7] 法捷耶夫Д.К.和B.H.法捷耶娃,线代数计算方法,上海科学出版社,109, 1965.

    [8] 斯米尔诺夫,B. H.高等数学教程,第三卷第一分册,人民教育出版社,143, 1957年1月新1版.

    [1] Bott, M. H.P., The mechanism of oblique slip faulting, Geological Magazine, 96, 2,109——117, 1959.

    [2] Angelier, J.Determination of the mean principal directions of Stresses for a given population, Tec——tonoplaysics, 56, T17——T26,1979.

    [3] Angelier, J., Inversion of field data in fault tectonics to obtain the regional stress—I.Single phase fault populations: a new method of computing the stress tensor, Geophys. J. R. astr.Soc.,69, 3, 607——622, 1982,

    [4] Etchecopar, A., G. Vasseur, M.Daignieres, An inverse problem in microtectonics for the determination of Stress tensors from fault striation analysis,J.Struct. Geol., 3, 1,51——55,1981.

    [5] Angelier, J. et Stratis Manoussis,Classification automatique et distinction des phases superposees en tectonique de failles, C. R. Acad. Sc. Paris, t. 290, Serie D,651——654, 1980.

    [6] Ellsworth, W. L., A general theory for determing the state of stress in the earth from fault slip measurements, Terra Cognita, 2, 2, 170——171, 1981.

    [7] 法捷耶夫Д.К.和B.H.法捷耶娃,线代数计算方法,上海科学出版社,109, 1965.

    [8] 斯米尔诺夫,B. H.高等数学教程,第三卷第一分册,人民教育出版社,143, 1957年1月新1版.
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