伴随前兆蠕动和震后滑动的准静态形变--模型与观测实例

赵国光, 张超

赵国光, 张超. 1981: 伴随前兆蠕动和震后滑动的准静态形变--模型与观测实例. 地震学报, 3(3): 217-230.
引用本文: 赵国光, 张超. 1981: 伴随前兆蠕动和震后滑动的准静态形变--模型与观测实例. 地震学报, 3(3): 217-230.
ZHAO GUO-GUANG, ZHANG CHAO. 1981: QUASI-STATIC DEFORMATION ACCOMPANIED BY PRECURSORY CREEP AND POST-SEISMIC FAULT SLIPA MODEL AND SOME OBSERVATION EXAMPLES. Acta Seismologica Sinica, 3(3): 217-230.
Citation: ZHAO GUO-GUANG, ZHANG CHAO. 1981: QUASI-STATIC DEFORMATION ACCOMPANIED BY PRECURSORY CREEP AND POST-SEISMIC FAULT SLIPA MODEL AND SOME OBSERVATION EXAMPLES. Acta Seismologica Sinica, 3(3): 217-230.

伴随前兆蠕动和震后滑动的准静态形变--模型与观测实例

QUASI-STATIC DEFORMATION ACCOMPANIED BY PRECURSORY CREEP AND POST-SEISMIC FAULT SLIPA MODEL AND SOME OBSERVATION EXAMPLES

  • 摘要: 为了建立断层蠕动与其周围地壳形变的关系, 本文给出了线性粘弹性半空间中任意倾角的断层滑动引起的准静态位移场的完整的解析表达式.其中, 滑动时间函数的形式是根据经验拟定的, 而介质被视为广义开尔文体或麦克思韦体.通过数值计算讨论了介质的流变性对位移场的影响.根据1976年唐山地震前后在地震区取得的短期观测资料的分析, 论证了唐山主震前夕在极震区地壳上部曾发生过前兆蠕动, 而且主震后断层仍继续滑动, 但其速率呈指数型衰减.估算了符合观测数据的断层滑动参数, 并对这些结果的意义作了简要的讨论.
    Abstract: In order to set up the relation between fault creeping and crustal deformation in the neighbourhood of it, in this paper, analytical expressions for quasi-static deformation field produced by a slipping f auit of arbitrary dip in a linear viscoelastic half-space are given in closed forms. The forms of slip-time function in the expressions are determined empirically, and the rock media are considered as generalized Kelvins or Maxwell substances. The effect of viscoelasticity on the deformation field has been discussed through numerical computation. By analysing the short period geodetic data obtained in the 1976 Tangshan earthquake region before and after the earthquake, it can be demonstrated that precursory creep had occurred in the upper crust of the epicentral area prior to the main shock and the fault continued to slip after it but the rate fell off exponentially with time. The slip parameters which fit the observed data are estimated and the implication of all these results are briefly discussed.
  • [1] J. D. Byelee, and W. F. Brace, A summary, In: Proc, Conf. II. Expervmental Studies of Rock Friutior, with Applieation to Earthquake Prediction, 5——8, 1978.

    [2] J. D. Byerlee, and R. Summers, Stable sliding preceding stick——slip on fault surface in granite at high pressure, Pageopla, 113(1/2), 63——68. 1975.

    [3] J. H. Dieterich, Preseismic fault slip and earthquake prediction, J. Geophys. Res., 83 (B8), 3940——3948. 1978.

    [4] C. Scholz, P. Molnar, and T. Johnson, Detailed studies of frictional sliding of granite and implications for the earthquake mechanism, J. GeopTays. Res., 77, 6392——6406. 1972.

    [5] 陈运泰、黄立人等, 用大地测量资料反演得到的1976年唐山地震的位错模式, 地球物理学报, 22, 3, 201——216, 1979.

    [6] 国家地震局地震测量队, 1966年邢台地震的地形变, 地球物理学报, 18, 3, 153——163. 1975,

    [7] 国家地震局地震测量队, 1970年云南省通海地震的地形变特征, 地球物理学报, 18, 4, 240——245. 1975.

    [8] S. J. Singly andM.Rcsenman, Quasi——static deformation of a viecoelastic half space by a displacement dislocation, Plays. Earth Plam, et. Interior, 8, 87——101. 1374.

    [9] 陈运泰等, 根据地面形变的观测研究1966年邢台地震的震源过程, 地球物理学报, 18, 3, 164——181. 1975.

    [10] J. O. Jaegcr, and N.G. W. Cook, Fundamentals of Rock Mechanics, 2nd ed., Chapman and Hall. London, 1376.

    [11] A. E. Scheidegger, Principles o f Geodynamics, 2nd ed., Springer——Verlag. 1963.

    [12] D. R. Bland, Tlae Theory of Linear Tiscoelasticity, Pergamon, New York, 1980.

    [13] 邱群, 1976年7月28日河北省店山7.8级地震的发震背景及其活动性, 地球物理学报, 19, 4, 259——269, 1976.

    [14] Zhao Cuoguang anal Huang Peiyu, Fault movements and stress accumulation before the 1376 Tangshan earthquake in North China, 26e Congres Geologique International, Resumes, 1, 414. 1980.

    [1] J. D. Byelee, and W. F. Brace, A summary, In: Proc, Conf. II. Expervmental Studies of Rock Friutior, with Applieation to Earthquake Prediction, 5——8, 1978.

    [2] J. D. Byerlee, and R. Summers, Stable sliding preceding stick——slip on fault surface in granite at high pressure, Pageopla, 113(1/2), 63——68. 1975.

    [3] J. H. Dieterich, Preseismic fault slip and earthquake prediction, J. Geophys. Res., 83 (B8), 3940——3948. 1978.

    [4] C. Scholz, P. Molnar, and T. Johnson, Detailed studies of frictional sliding of granite and implications for the earthquake mechanism, J. GeopTays. Res., 77, 6392——6406. 1972.

    [5] 陈运泰、黄立人等, 用大地测量资料反演得到的1976年唐山地震的位错模式, 地球物理学报, 22, 3, 201——216, 1979.

    [6] 国家地震局地震测量队, 1966年邢台地震的地形变, 地球物理学报, 18, 3, 153——163. 1975,

    [7] 国家地震局地震测量队, 1970年云南省通海地震的地形变特征, 地球物理学报, 18, 4, 240——245. 1975.

    [8] S. J. Singly andM.Rcsenman, Quasi——static deformation of a viecoelastic half space by a displacement dislocation, Plays. Earth Plam, et. Interior, 8, 87——101. 1374.

    [9] 陈运泰等, 根据地面形变的观测研究1966年邢台地震的震源过程, 地球物理学报, 18, 3, 164——181. 1975.

    [10] J. O. Jaegcr, and N.G. W. Cook, Fundamentals of Rock Mechanics, 2nd ed., Chapman and Hall. London, 1376.

    [11] A. E. Scheidegger, Principles o f Geodynamics, 2nd ed., Springer——Verlag. 1963.

    [12] D. R. Bland, Tlae Theory of Linear Tiscoelasticity, Pergamon, New York, 1980.

    [13] 邱群, 1976年7月28日河北省店山7.8级地震的发震背景及其活动性, 地球物理学报, 19, 4, 259——269, 1976.

    [14] Zhao Cuoguang anal Huang Peiyu, Fault movements and stress accumulation before the 1376 Tangshan earthquake in North China, 26e Congres Geologique International, Resumes, 1, 414. 1980.

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  • 发布日期:  2011-08-31

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