中文摘要：

对华北地区1999以来的GPS观测数据进行处理，得到统一的GPS速度场。建立华北地区块体一位错模型，利用模拟退火方法，反演主要块体的运动速率和断裂的活动性参数。研究表明，相对华南块体，研究区内各块体的欧拉角速度较小，且都为顺时针运动，断裂活动性相对较弱。整体上张家口一蓬莱构造带处于左旋运动，运动速率约为1mm／a，西段和东段表现出不同的性质，闭锁深度分别为40km和30km。山西断裂带具有一定程度的右旋走滑，走滑速率约为1mm／a，断裂锁定深度为30km。郯庐断裂带表现为右旋走滑，走滑速率在1mm／a左右，断裂锁定深度为40km。

英文摘要：

A consistent velocity field was derived from the GPS observations carried out in north China starting from 1999. A block-dislocation 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. Zhangjiakou- Penglai Tectonic Belt is undergoing left-lateral 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 kin, respectively. Shanxi Fault Belt is characterized by a right-lateral slipping with a rate of 1 ram/a, and a locking depth of 30 km. Tanlu Fault exhibits right-lateral motion, with a slipping rate of 1 mm/a, and a locking depth of 40 km.