中文摘要：

利用国家重大科学工程“中国地壳运动观测网络”建立以来截止到2001年的932个GPS测站的水平运动速度矢量，在块体运动和变形模型下研究了中国大陆现今水平运动和变形的特征。用拟准探测法，我们把现今中国大陆划分出12个有明显相对运动的活动块体。以通常所说南北带为界，中国东部块体的活动接近于刚体，而西部的地壳块体的平均应变比东部地块明显要大。定量地研究了这12个活动块体之间的边界带的活动方式和活动强度。

英文摘要：

On the basis of the horizontal velocity field at 932 GPS sets derived from GPS observations during the period from the establishment of the Crustal Movement Observation Network of China （CMONOC） in 1998 to the end of 2001, we obtain horizontal velocity field of China. Based on the block motion and deformation model, the characteristics of horizontal motion and deformation are studied. By using Quasi-Accurate Detection method （QUAD） we have divided mainland China into 12 coherent crustal blocks with significant relative motions between each other. Taking the so-called North-South Seismic zone as a boundary the blocks in eastern China behave as rigid blocks, and those in western China have significant internal deformation. Average strain in crustal blocks in western China is significantly larger than those in eastern China. The motion patterns and intensities in boundary zones between the 12 active blocks are also quantitatively studied.