Abstract: We used GPS data in the northeastern margin of the Qinghai-Tibet Plateau from 1991 to 2015 to obtain slip rates along active faults based on the elastic block model, and then discussed the dynamic implication of the pattern. Our results show that most of the blocks in the study area move northeastward and rotate clockwise, the average lock depth of fault is 17 km, and the major active fault zones also have large difference in their velocity. For example, the left-lateral strike-slip rate of the Altyn and the East Kunlun fault is 10～12 mm/a. The left-lateral strike-slip rate of the Qilian-Haiyuan fault is 3～5 mm/a. The right-lateral strike slip rate of the Elashan and Lajishan fault is 1～3 mm/a. The strike-slip rates of the Altyn fault, the Qilian-Haiyuan fault and the East Kunlun fault are absorbed and converted by the mountain uplift and reverse thrust faults at the ends of the fault, the Elashan fault and the Lajishan fault play the role of adjusting blocks.

Key words: Slip rate, Lock depth, Block model, GPS, Northeastern Tibetan Plateau