中国大陆现今地壳运动研究

CURRENT CRUSTAL MOVEMENT IN CHINESE MAINLAND

中亚、东亚地区的构造变形的定量化对全球板块运动和岩石圈动力学研究具有重要意义 .最近 4年 ,利用空间技术 ,一个全面反映中国大陆地壳水平运动的实测速度场已基本完成 .GPS结果十分清晰地刻画出中国大陆地区块体运动及内部变形特征 ,提供了认识印度 欧亚碰撞引起的活动构造的新视角 .本文回顾了 4年来中国学者在利用GPS研究现今地壳运动方面所取得的成就 ,以及在利用InSAR技术研究强震破裂方面的进展情况 .这些研究成果 。

The quantification of tectonic deformation in the Eastern and Central Asia is of great significance for the study on global plate motion and lithospheric dynamics. In the past four years, the velocity field of horizontal crustal movement for the Chinese mainland has been established for the first time thanks to the intensified GPS measurements and its improved accuracy. The velocity field derived from GPS measurements delineates the patterns of tectonic deformation in Chinese mainland in the unprecedented detail, and thus reveals the new features of the ongoing tectonic process resulted from the collision of India plate to Eurasia plate. Meanwhile, the surface offset induced by two strong earthquakes occurred in Chinese mainland was sampled precisely using InSAR technique.