中国大陆主要构造块体现今运动的基本特征  

The Fundamental Characteristics of Principal Tectonic Blocks Present Movement in Chinese Mainland

作　　者：赖锡安[1] 徐菊生[1] 卓力格图[1] 刘经南[2] 施闯[2] 姜卫平[2] 

机构地区：[1]中国地震局地震研究所,中国武汉430071 [2]武汉测绘科技大学,中国武汉430079

出　　处：《中国地震》2000年第3期213-222,共10页Earthquake Research in China

基　　金：国家自然科学基金!(No.490 74005);攀登项目"现代地壳运动与地球动力学研究"资助

摘　　要：为了研究中国大陆现代地壳运动和地球动力学 ,在 90年代初布设了由 2 2个站组成的全国GPS监测网 ,测站均匀布设在中国大陆不同块体上 ,1992、1994和 1996年对该网进行了3次观测。本文主要评述了 3次观测的资料处理和精度 ,分析了 3次复测获得的中国大陆现今块体运动的基本特征。研究结果表明 ,GPS网 3次观测获得的资料精度均达到 10 - 8～ 10 - 9,能满足地壳运动监测的需要。利用 3次复测资料结果所建立的我国大陆块体运动模型 ,有效地检验了地质学和地球物理学的研究结果。在全球框架中 ,我国大陆整体存在着明显的向东运动 ,相对于西伯利亚的区域性运动特征是 :我国西部地区主要受印度板块向北的俯冲和推挤的影响 ,青藏高原在南北向压缩的同时 ,存在着明显的向东的侧向滑移 ,这对大陆逃逸模型是较为有利的支持 ;东部地区的块体运动 ,同时受到印度板块以及太平洋板块、菲律宾板块的联合作用 ,导致了东部地区的北东向及东向的运动 ,到达东南沿海地区 。To study the current crustal movement and geodynamics in Chinese mainland, a GPS network had been established with 22 stations on major tectonic block in China in 1990s. Three observations had been carried out in 1992, 1994 and 1996, respectively by the network. This paper presents that the accuracy of three times of GPS observation reaches 10 -8 ～10 -9 ,and that is adequate to monitor crustal movement. The block movement model in Chinese mainland based on three times of GPS observation can prove the result of geology and geophysics: In the International Terrestrial Frame (ITRF), the Chinese mainland has a trend of eastward movement relation to Euro\|Asia block. The regional characteristic relation to Siberia stable blocks in that the western part of China is mainly affected by the India plate northward dive and push as the Qinghai Xizang plateau being pressed north\|south ward, it has obvious slippage eastward. Under the India, Pacific and Philippine plates' joint effect, eastern part of China has north\|east and eastward movement. The Philippine plate's effect become the strongest one in the southeast foreland.

关 键 词：中国 大陆 构造板块 GPS监测网 地壳运动 

分 类 号：P542.4[天文地球—构造地质学] P208[天文地球—地质学]