利用卫星地球重力场模型研究新疆壳幔结构

根据中国卫星地球重力场模型ＩＧＧ９３Ｅ，计算出新疆地区不同阶窗的卫星重力异常和分层面密度异常，并对异常场源深度进行了讨论．同时，利用计算结果结合其它地球物理资料，综合分析了新疆地壳－上地幔的结构及地球动力学特征．结果表明：新疆地区壳幔结构具有明显的纵向分层和横向分块特点，横向不均匀性在３７阶以上的高阶场中反映十分明显．其中，塔里木地台中央地段上地幔上隆，岩石图呈稳定块体特征；地台周缘则为壳幔陡变带，幔源物质上涌造成部分熔融，地台边缘呈断块分离、升降．

A Study of Satellite Gravity for Crust-Mantle

With the help of the analysis of satellite gravity anomalies computed by using the geopotential coefficents to 360-degree regional gravity model IGG93E (360) in China and the surface density-stratification anomalies map calculated by the Molodensky single-layer density theory, the author discussed the Relativity of Crust-Mantle Structure and the background of geodynamics in Xinjiang. The results show that satellite gravity anomalies can be applied to the study of the structure of crust-mantle and the background of geodynamics.The author came to the conclution that the distribution of satellite gravity anomalies are of great importance to the study of tectonic evolution.