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.
出处
《武汉大学学报（信息科学版）》
EI
CSCD
北大核心
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)
关键词
地球动力学
地幔对流
应力场
青藏高原
Tibetan Plateau
mantle convection
stress field
geodynamic implication
