青藏高原及邻区地幔对流应力场及地球动力学含义  

Mantle Convection Generated Stress Field Beneath Tibetan Plateau and Its Adjacent Areas and Its Geodynamic Implication

作　　者：熊熊[1] 许厚泽[1] 滕吉文[2] 王继业[1] 

机构地区：[1]中国科学院测量与地球物理研究所,武汉市徐东路174号430077 [2]中国科学院地质与地球物理研究所,北京市朝阳区德外祁家豁子100029

出　　处：《武汉大学学报（信息科学版）》2003年第6期692-696,共5页Geomatics and Information Science of Wuhan University

基　　金：国家自然科学基金资助项目 ( 4 0 2 740 3 7;40 2 3 40 44 );中国科学院资环局资助项目 (KZCX2 10 9;10 6;KZCX3 SW 13 1)

摘　　要：基于改进的Runcorn模型 ,利用布格重力异常计算了青藏高原及邻区地幔对流应力场。数值结果显示 ,青藏高原中部、北部和天山为应力发散区 ,对应地幔上升流 ,而塔里木、柴达木、四川盆地等地区则为应力汇聚区 ,对应下降区。地幔对流形态与地表特征之间的相关性表明 。The collision and compression between the India and Eurasia plates can not generate all the tectonic features of Tibetan Plateau and the uplift of Kunlun, Tianshan and great depression of Tarim and other basins. We have to seek an other geodynamic mechanism to clarify the continental dynamic process. The stress field induced by mantle convection beneath Tibetan Plateau and its adjacent areas is calculated by using the Bouguer gravity anomalies based on an improved Runcorn's scheme. The stress divergent zones,corresponding upwellings of mantle flow, are located beneath central and northern Tibetan Plateau and Tianshan, while convergent ones, downwellings, under Tarim, Qaidam and Sichuan basins.

关 键 词：地球动力学 地幔对流 应力场 青藏高原 

分 类 号：P541[天文地球—构造地质学]