汶川地震震后短期青藏高原东北缘地壳变形特征成因讨论

Abstract

Abstract: Crust movement changed obviously in the northeastern margin of Tibetan Plateau zone according to GPS measurements during 2007—2009. This paper analyzed the coseimic effect and postseismic viscoelastic relaxation and afterslip effect respectively. The results show that some deformation was formed because of coseismic effect, but the postseismic viscoelastic relaxation and afterslip effect can be neglected. Some characteristics of postseismic short-term deformation can not be explained adequately by the deformation mechanics for China mainland, which belongs to multi-block system. To a large extent, the form of the characteristic of postseismic short-term deformation in the northeastern margin of Tibetan Plateau zone may be related to adjustment movement of blocks.

Key words: Short-term Crust Deformation, GPS, Northeastern Margin of Tibetan Plateau, Wenchuan earthquake

CLC Number:

P315.7

LI Qiang, JIANG Zai-sen, WU Yan-qiang, ZHAO Jing, WEI Wen-xin, LIU Xiao-xia. Discussion on the Implications of Short-term Crust Deformation Characteristics in the Northeastern Margin of Tibetan Plateau after the 2008 Wenchuan Earthquake[J]. EARTHQUAKE, 2013, 33(3): 124-132.

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Discussion on the Implications of Short-term Crust Deformation Characteristics in the Northeastern Margin of Tibetan Plateau after the 2008 Wenchuan Earthquake

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