通量均衡意义下中国大陆现今地壳垂直运动及梯度分布与构造活动的关系

PRESENT VERTICAL CRUSTAL MOVEMENT AND ITS GRADIENT IN THE MAINLAND OF CHINA UNDER THE FLUX-ISOSTATIC DATUM AND SOME RELATIONS BETWEEN THEM AND TECTONIC ACTIVITY

本文在应绍奋等研究成果的基础上,利用作者所提出的方法重新处理了覆盖中国大陆(不包括海南省、台湾省等岛屿)900余万平方公里的垂直形变资料,给出了在通量均衡基准下中国大陆现今地壳垂直运动及其梯度的空间分布以及几大地块的平均速率和通量。由此得出以下认识:(1)现今地壳垂直运动与大陆所处的力场有较好的对应性。(2)现今地壳垂直运动具有明显的南升北降大趋势;以西部最为典型和强烈。(3)现今地壳垂直运动高梯度值带与地震带的分布有较好的吻合性。(4)现今地壳垂直运动的分群性与大陆各大地块的划分有较好的匹配性。

In this paper, releveling data from the mainland of China (except Taiwan, Hainan islands et al) are processed and studied further based on the flux-isostatie datum methud presented by authors and the achievement given by Mr. Ying Shaofen. The following results are obtained.(1) There is a better relation between the present vertical crustal movement and round force fields that the mainland lie in.(2) There is the general tendency of the uplift on the sonthern mainland and the subsidence on the Northern mainland.(3) There is a better consistence between the gradient value of the vertical crustal movement and the distribution of seismic zone on space field.(4) There are different movement features on different land blocks.