利用高精度复测GPS网进行中国大陆区域地壳运动特征分析  

Analysis of crustal movement characteristics in the China mainland by high precision repeated measurements of GPS network

作　　者：姚宜斌[1] 

机构地区：[1]武汉大学测绘学院,武汉430079

出　　处：《地球物理学进展》2008年第4期1030-1037,共8页Progress in Geophysics

基　　金：国家863计划资助项目(2006AA12Z323);国家自然科学基金资助项目(40774008);国家973计划资助项目(2006CB701301);武汉大学地球空间环境与大地测量教育部重点实验室开放基金资助项目(06-10)资助

摘　　要：本文利用高精度复测GPS网,用多面函数拟合的方法计算出中国大陆地壳运动速度场模型,得到了有实用价值的中国地壳平面运动整体速度场图像和垂直速率等值线图像,同时计算出ITRF97参考框架下中国大陆地壳运动的区域背景场,该局域背景场与NNR-NUVEL1A、Sillard、Larson等全球板块运动模型所提供的欧亚板块的欧拉极方向和旋转速率在量级和大趋势上是一致的.据此对全球框架下的中国大陆区域地壳运动特征进行分析.With the high precision repeated GPS observations, the multi--quadric equations interpolation method is used to establish the speed field model of China mainland crustal movement. The valuable present--day horizontal and vertical crustal movement velocity images are obtained. The background field model of China mainland in ITRF97 frame is also computed by GPS velocity observations. The local background field model is largely consistent with Eu- rope --Asia tectonic plate＇s Euler direction and the spin rate provides by some global background field models such as NNR--NUVELIA model, Sillard model and Larson model in the magnitude and the major tendency, with which we can analyze the characteristics of crustal movement in the China mainland.

关 键 词：ITRF框架 速度场模型 背景场模型 地壳运动图像 

分 类 号：P315[天文地球—地震学] P542[天文地球—固体地球物理学]