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Shaoxian Zang, Zhongliang Wu, Aibing Licom sh advance. 1991: SEISMICITY AND STRESS STATE IN THE SOUTH CHINA SEA, INDOCHINA AND THEIR VICINITY. Acta Seismologica Sinica, 13(2): 129-138.
Citation: Shaoxian Zang, Zhongliang Wu, Aibing Licom sh advance. 1991: SEISMICITY AND STRESS STATE IN THE SOUTH CHINA SEA, INDOCHINA AND THEIR VICINITY. Acta Seismologica Sinica, 13(2): 129-138.
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SEISMICITY AND STRESS STATE IN THE SOUTH CHINA SEA, INDOCHINA AND THEIR VICINITY

  • Department of Geophysics, Peking University, Beijing 100871, China

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  • Published Date: September 01, 2011
    Graphical Abstract
    • Abstract
  • The distribution of earthquakes from 1973 to 1982 in the South China Sea, Indochina and their vicinity was studied using the data from I.S.C. It was found that the earthquakes are mainly concentrated along the boundaries of plates. Beside that, some shallow earthquakes are distributed in the west part of Burma and along the boundary between Burma and China, with a few earthquakes occurring in the South China Sea. The features of Benioff zone along theboudaries between the Indian plate, Philippine Sea plate and Eurasian plate were studied. The plates are not coupled well under the Java trench and the Philippine trench. The subducting Indian plate under the Burmese mountain and, Andaman-Nicobar arc moves NNE. The fault plane solutions of earthquakes were studied using the first motions of P waves. The stress state on the subduction zones and within the area were deduced from the fault plane solutions and the fault movement. It was found that the direction of principal compression axis of stress is in the NNE direction in west parts of Burma and Thailand, and in the NNW or N-S direction in the South China Sea. It was also found that the stress state has close relation with the interaction between plates.
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    • References (1)
  • [1] Dain, A. Y. L., Tappononier, P. and Molnar, P., 1984. Active faulting and tectonics of Burma and Surrounding regions. J. Geophyr. Res., 89, 453——472.

    [2] Taylor, B. and Hages, D. E., 1981. Origin and History of South China Sea basin, Geophys. Mongr. Am.Gcnphys. Union, 24, 23——56.

    [3] Tapponnier, P. and Molnar, P., 1976. Slip——line field theory and large——scale continental tectonics. Nature,264, 319——324.

    [4] 藏绍先,1987.缅甸山弧地区Benioff带的形态及其应力状态.地球物理学报,30,144——158.

    [5] Mukhopadhyay, M,1984. Seismotectonics of subduction and back——arc tifting under the Andaman Sea.Tectonophyrics, 108, 229——239.

    [6] 宁杰远、藏绍先,1987.日本海及中国东北地震的深度分布及其应力伏态.地震地质,9, 2, 49——61,

    [7] Uyeda, S. and Kanamori, H,1970. Back——arc opening and the mode of subduetion. J. Geophyr. Res., 84,1049——1061.

    [8] Cardwell R. K., Isacks, B. L, and Karig, D. E., 1980. The distribution of earthquakes, focal mechanism solutions and subducted lithosphere in the Philippine and Northeastern Indonisian Islands. Geophys. Mongr, Am. Geophys. Unson, 23, 1——35.

    [9] Ekstrom, G. A., 1987. A broad band method of earthquake analysis, Ph. D. thesis, Dept. Earth Planet.Sci., Harvard Univ., Cambridge Massachusetts.

    [10] 阐荣举、张四昌、晏凤桐、俞林胜,1977.我国西南地区现代构造应力场与现代构造特征的探讨.地球物理学报,20 96——109,

    [11] 哪家全、时振梁,1979.中国及邻区现代构造应力场的特征.地震学报,1, 9——24,

    [12] 减绍先,1981.地震断裂和应力场.地震地质,3, 3, 37——46,

    [13] 张文佑,1986.中国及邻区海陆大地构造,352——356.科学出版社,北京.

    [1] Dain, A. Y. L., Tappononier, P. and Molnar, P., 1984. Active faulting and tectonics of Burma and Surrounding regions. J. Geophyr. Res., 89, 453——472.

    [2] Taylor, B. and Hages, D. E., 1981. Origin and History of South China Sea basin, Geophys. Mongr. Am.Gcnphys. Union, 24, 23——56.

    [3] Tapponnier, P. and Molnar, P., 1976. Slip——line field theory and large——scale continental tectonics. Nature,264, 319——324.

    [4] 藏绍先,1987.缅甸山弧地区Benioff带的形态及其应力状态.地球物理学报,30,144——158.

    [5] Mukhopadhyay, M,1984. Seismotectonics of subduction and back——arc tifting under the Andaman Sea.Tectonophyrics, 108, 229——239.

    [6] 宁杰远、藏绍先,1987.日本海及中国东北地震的深度分布及其应力伏态.地震地质,9, 2, 49——61,

    [7] Uyeda, S. and Kanamori, H,1970. Back——arc opening and the mode of subduetion. J. Geophyr. Res., 84,1049——1061.

    [8] Cardwell R. K., Isacks, B. L, and Karig, D. E., 1980. The distribution of earthquakes, focal mechanism solutions and subducted lithosphere in the Philippine and Northeastern Indonisian Islands. Geophys. Mongr, Am. Geophys. Unson, 23, 1——35.

    [9] Ekstrom, G. A., 1987. A broad band method of earthquake analysis, Ph. D. thesis, Dept. Earth Planet.Sci., Harvard Univ., Cambridge Massachusetts.

    [10] 阐荣举、张四昌、晏凤桐、俞林胜,1977.我国西南地区现代构造应力场与现代构造特征的探讨.地球物理学报,20 96——109,

    [11] 哪家全、时振梁,1979.中国及邻区现代构造应力场的特征.地震学报,1, 9——24,

    [12] 减绍先,1981.地震断裂和应力场.地震地质,3, 3, 37——46,

    [13] 张文佑,1986.中国及邻区海陆大地构造,352——356.科学出版社,北京.
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