J4 ›› 2012, Vol. 42 ›› Issue (2): 519-525.

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Fault Distribution of Longmenshan and Adjacent Regions and Fault Morphological Differences Before and After the Earthquake

MA Guo-qing, MENG Ling-shun, LI Li-li   

  1. College of GeoExploration Science and Technology, Jilin University,Changchun130026,China
  • Received:2011-07-07 Online:2012-03-26 Published:2012-03-26

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Abstract:

The fault distributions and reference depths in Longmenshan and adjacent areas before earthquake has been obtained by Euler equation (Euler deconvolution) inversion method about gravity data of Wenchuan area. Wenchuan earthquake spreads widely and causes seriously destructions, which will results in  morphology differences in seismogenic fault and peripheral faults. A gravity profile was designed in this area to compare the fault morphology before and after the earthquake. The thrust nature of Longmenshan belt diminished, and a number of fracture zone between Yingxiu-Beichuan fault and Dujiangyan-Jiangyou fault were produced.The viewpoints of stress plane (second earthquake plane) and multi-sources were proposed according to the genesis research about Wenchuan earthquake through fault  morphology differences.

Key words: Euler equations, gravity, Wenchuan earthquake, fault morphology

CLC Number: 

  • P631.1
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