中国大陆现今垂直形变特征的初步探讨

利用GPS观测资料进行大范围的垂直形变特征研究是本文研究的重点。通过网络工程基准站和基本站的GPS观测资料，绘制了中国大陆的垂直速率等值线图像，并对中国大陆垂直运动特征进行了定性的分析，结果表明：中国大陆垂直运动在70％以上的区域表现为沉降运动，在青藏高原和除北京外的整个华北块体及燕山块体的垂直运动表现为隆升的趋势。中国大陆西北和东南、西南和东北的整体垂直运动呈一种斜对称状态。对基于GPS观测所得的等值线图与基于水观测所得的等值线图进行了比较，比较结果显示，除了华南块体外，二者在整体趋势上比较一致。

PRELIMINARY RESEARCH ON CHARACTERISTIC OF PRESENT-DAY VERTICAL DEFORMATION OF CHINA MAINLAND

The classical research method for analysing the characteristic of vertical crust movement of China is by leveling observations. This paper is major in the research of the characteristic of vertical crust movement in large scale areas by high precision GPS observations. With the GPS observations of Crustal Movement Observation Network of China(CMONOC), a largely covering and valuable vertical velocity field model and the vertical crust movement velocity isoplethes are obtained. From the velocity isoplethes, the characteristic of vertical crust movement in China mainland is qualitatively analysed: more than 70% of China mainland are subsiding and the speed of subsidence is less than 20mm/a , the Qinghai Tibet plateau?North China block(excluding Beijing area) and Yanshan block are uplifting with the speed of less than 15mm/a. In northwest and southeast,southwest and northeast areas of China the holistic vertical crust movement are shown in an approximate slanting symmetry state. The comparison of isoline map measured by GPS with that by leveling shows that in entire trend they,except South China block, agree with each other basically.