关键词: 地壳形变, 深断裂位错模型, GPS观测

Abstract: On the basis of geological data,the three-dimensional geometric model and the segmentation model of the spatial distribution of the Zhuanglanghe faults and the northern marginal fault of Maxianshan are firstly established; Then,with the constraints of slip rates of some studied thoroughly faults,the inferred GPS velocity from the project“Crustal Movement Observation Network of China”is simulated by using“Three-dimensional Deep-fault Dislocation Model”; Finally,the current sliding rates of some other faults are calculated with the inversion method. The results show that there is a rate of 1.4～3.0mm/a of thrust slip on the northern margin fault of Maxianshan,with a left-lateral slip rate of about 3.0mm/a on the middle of the faults,and that there is a thrust slip rate of 0.6～1.2mm/a on the Zhuanglanghe faults with unobvious left-lateral slip component. These results are in accordance with the geological results. The GPS station velocities predicted by the model are consistent with the observed velocities as a whole. It is therefore assumed that these results are all in the reasonable extent predicted before. For the faults with relatively low slip rates and on which the conventional geological methods are difficult to apply,e.g. the Zhuanglanghe faults and the Maxianshan fault,the inversion based on the GPS observations is an effective ancillary means.

Key words: crustal deformation, three-dimensional Deep-fault Dislocation Model, GPS observation