Experiment of Dividing the Active Blocks Based on Horizontal Crustal Movement Observed by GPS

In this paper, the discrepancy between the movements of intraplate blocks and plates is discussed, and the method to divide the intraplate active blocks is presented by selecting Bursa formula as the kinematic model for the intraplate blocks. Based on the data of three GPS campaigns in North-China network in 1995, 1996 and 1999, respectively, the northern area in North China is divided into eight small blocks with the mathematical model and method presented in this paper. The divided blocks based on the horizontal and vertical crustal movements in the paper are consistent or approximate with each other in the area as a whole. The divided blocks in the paper is also basically accordant with the neotectonic movement, which indicates that the current movement of active blocks in this area is the succession and development of neotectonic movement. Moreover, some new activity characteristics in the area have been revealed by the tectonic units divided with the horizontal crustal movement.