On 2008 May 12,The Mw 7.9 Wenchuan earthquake along the Longmenshan Fault zone,occured at the eastern margin of the Tibetan Plateau,rupturing the Beichuan-Yingxiu and Guanxian-Jiangyou faults.Based on the segmenting fault model,we derive the fine slip distribution by utilizing a sensitivity-based iterative fitting method(SBIF) to GPS datasets mainly from the Crustal Movement Observation Network of China(CMONOC),with the two models of the homogeneous half space and the stratified crustal structure.The result...