Abstract: Based on two periods of GPS remeasurement data of 1995 and 1996 in North China,the tectonic block movement of this area in present period is calculated and analyzed. The results indicate that the movement can be described by a four block movement model. The model consists of four blocks:Erdos block,Jin Ji Lu block,Jiaoliao block and Yinshan Yanshan block. As to the differential movement between the blocks,it is rather intense between Erdos block and Jin Ji Lu block,rather weak between Yinshan Yanshan block and Jin Ji Lu block and Tanlu fault zone is the moderate. The results also indicate that Bohai Sea may still have some extensional movement. In this area,if Erdos block is used as a reference,all the blocks in the eastern part are shifting toward the east.

Key words: North China, Global positioning system, Horizontal movent, Tectonic block displacement

摘要： 利用1995和1996年华北地区两期GPS复测资料,计算研究了该区现阶段的构造块体运动。结果说明,该区现阶段的构造运动可用鄂尔多斯块体、晋冀鲁块体、胶辽块体和阴山 燕山块体4块体运动模型进行描述和分析。鄂尔多斯块体与晋冀鲁块体之间差异活动较强烈,阴山 燕山块体与晋冀鲁块体之间较弱,郯庐断裂带居中。结果还表明渤海可能仍有一定的扩张活动。若以鄂尔多斯块体为本区参照,其东部各块体均向东移动。

关键词: 华北, 全球定位系统, 水平运动(地质), 构造块体位移