STUDY ON MOTION AND DEFORMATION STATE OF YANSHAN-BOHAI ZONE FROM GPS DATA
利用GPS资料研究燕山-渤海带的运动状态

Using the GPS velocity field data from 1999-2007,we studied the movement and state of Yanshan-Bohai zone and calculated the relative movement of different parts in different periods.In 1999-2001 period,Yinshan zone was a left-lateral extension strike slip belt with the slip rate less than 1.0mm/a and extension rate less than 1.35 mm/a,in 2001-2004 and 2004-2007 periods,it kept left-lateral strike slip with the rate of 0.04 mm/a-1.59 mm/a,but the extensional feature was not obvious.Furthermore,its motion bec...