INVERSION OF THREE DIMENSION SLIDING RATE OF LONGMENSHANFAULT AND CHARACTERS OF ITS SEGMENTS
Zhang Guigang 1) ;Yang Zhiqiang 1) ; and Wang Qingliang 2)
1)Geodesy and Spatial Information Research Institution,Chang’an University, Xi’an 7100542)Second Crust Monitoring and Application Center,CEA,Xi’an 710054
Abstract：On the basis of negative dislocation model and PSO algorithm, the three dimension sliding rate of Longmenshan fault was inversed.The inverted results indicate that the modern tectonic movement of the Longmenshan fault zone represents rightlateral thrust and small movement rate as a whole,but its movement has so obvious partition that main feature of the southern section is thrust, coupled with leftlateral and then it may be subjected to the effect of the Xianshuihe fault’s rapidly left-lateral slipping;in addition,along the fault from southern section to north, the slipping movement has translated to rightlateral slip and the slideslip component has gradually increased. The northern and southern parts of the Longmenshan fault have taken on squeezing; otherwise the midsection shows a certain tension. It is inferred that the current tectonic feature of Longmenshan fault is concerned with the regional stress field and crustal structure in the context of the overall movement of QinghaiTibet Plateau.
Zhang Guigang ,Yang Zhiqiang ,and Wang Qingliang . INVERSION OF THREE DIMENSION SLIDING RATE OF LONGMENSHANFAULT AND CHARACTERS OF ITS SEGMENTS[J]. jgg, 2011, 31(1): 5-8.
