空间大地测量测定板块运动的新进展及其与地质学成果的比较  

NEW PROGRESS IN MEASUREMENT OF PLATE MOVEMENT BY SPACE GEODESY AND COMPARISON WITH GEOLOGICAL RESULTS

作　　者：徐菊生[1] 赖锡安[1] 张国安[1] 王庆廷[1] 

机构地区：[1]中国地震局地震研究所,武汉430071

出　　处：《地壳形变与地震》2001年第3期55-65,共11页Crustal Deformation and Earthquake

基　　金：国家攀登项目<现代地壳运动与地球动力学研究>;国家自然科学基金项目 (No .498740 0 5 )联合资助

摘　　要：阐述利用空间大地测量测定和研究板块运动的基本方法、研究成果及最新进展 ,并和地质学方法进行了比较。结果表明 ,用地质学方法与用大地测量方法建立的板块运动模型参数在整体上具有很好的一致性 ,但对某些板块而言两者相差甚大 ,超出了模型误差的范围 ,其中 ,所有大地测量得到的太平洋板块速率都大于地质模型 ,极位置经度都偏小。不同作者利用空间大地测量建立的板块运动模型参数也存在着一定的差异 ,这种差异与所利用的数据类型、板块及其边界划分方案、测站的数量与分布状态及测站取舍的原则有关 ,尤其是与测站的分布及强变形 (非刚性板块运动 )测站的取舍有关。在研究区域性地壳运动时 ,采用不同的板块运动模型将会得到不同的背景场 ,从而会得到不同的区域运动图像 ,因此选择合适的背景场模型是至关重要的。The basic methods, research results and new progress in measurement of plate movement by space geodesy and the comparison with the results by geological method are expounded. It is shown that both of the model parameters of plate movement obtained by geodetic and geological methods agree with each other very well as a whole while for some plate there are considerable differences over the limit of model error. Among them, for the Pacific Plate all of the moving rates measured by geodetic method are larger than that by geological model and the longitude of the polar positions are quite small. In addition, the model parameters of plate movement obtained by different researcher using space geodesy are certainly unequal. The differences are related to utilized data type, dividing scheme of plates and their boundaries, amount and distribution pattern of stations and the principle of making choice of stations, in particular, the stations which have strong deformation (nonrigid plate movement).\;

关 键 词：空间大地测量 板块运动 地质模型 地壳运动 VLBI观测数据 

分 类 号：P223[天文地球—大地测量学与测量工程]