STUDY ON CHARACTERISTICS OF TECTONIC BLOCKS AND FAULTS
IN THE NORTH CHINA USING BLOCK-DISLOCATION MODEL
1）Key Laboratory of Earthquake Prediction，Institute of Earthquake Science，CEA，Beijing 100036
2）Earthquake Administration of Zhejiang Province，Hangzhou 310013
3）First Monitoring Center，CEA，Tianjin 300180
4）University of New South Wales，Sydney 2052
Abstract：A consistent velocity field was derived from the GPS observations carried out in north China starting from 1999.A blockdislocation model was established and the characteristics of major tectonic blocks and faults were analyzed using the simulated annealing algorithm.The result shows that the Euler vectors of all tectonic blocks are relatively smaller with respect to the South China block.Fault activities are insignificant generally.ZhangjiakouPenglai Tectonic Belt is undergoing leftlateral motion，with a slipping rate of 1 mm/a.The western segment and the eastern segment of the Belt are different in terms of slipping magnitude，with locking depths in 40 km and 30 km，respectively.Shanxi Fault Belt is characterized by a rightlateral slipping with a rate of 1 mm/a，and a locking depth of 30 km.Tanlu Fault exhibits rightlateral motion，with a slipping rate of 1 mm/a，and a locking depth of 40 km.
Zhu Ze,Meng Guojie,Su Xiaoning et al. STUDY ON CHARACTERISTICS OF TECTONIC BLOCKS AND FAULTS
IN THE NORTH CHINA USING BLOCK-DISLOCATION MODEL[J]. jgg, 2014, 34(4): 39-42.
