印度与欧亚板块碰撞的数值模拟和现代中国大陆形变  

Numerical simulation of the collision between Indian and Eurasian Plates and the deformations of the present Chinese continent

作　　者：傅容珊[1,2] 黄建华[1,2] 徐耀民 李力刚[1,2] 常筱华 

机构地区：[1]中国科学技术大学地球和空间科学系 [2]第三世界科学院中国科学技术大学地球科学和天文学高级研究中心中国合肥230026 [3]中国科学技术大学应用化学系

出　　处：《地震学报》2000年第1期1-7,共7页Acta Seismologica Sinica

基　　金：国家攀登计划!(97023103);中国科学院武汉动力大地测量实验室资助

摘　　要：将大陆岩石层视为由幂指数律控制的一薄层， 它上伏在粘滞性较低的软流层之上蠕变流动， 其运动限制在与东亚大陆构造形态较相似的梯形边界模型框架之中． 设印度板块以一恒定的速度向北推进， 其被视为青藏高原挤压隆升的主要动力． 用数值模拟的方法研究了青藏高原的挤压隆升和中国大陆形变的演化过程． 模拟结果表明， 计算得到的现代水平形变与现代空间大地测量技术（ＧＰＳ）观测的水平形变格局较好吻合， 说明印度板块与欧亚板块的碰撞、挤压是构成中国大陆内部岩石层水平形变的主要驱动力． 模型计算还表明， 大陆水平形变受多种因素， 如岩石层的力学参数， 特别是边界条件的制约．In this paper the continental lithosphere of the East Asia is regarded as a continuum in a power law rheology. It lays on a relative soft upper mantle and limited in a trapezoid geological frame. The movement of the Indian Plate at the rate of 5 cm/a is assumed to be the main driving force for the Tibet Plateau(s uplift and the lithosphere deformation of the Chinese continent. The numerical simulation shows that the predicted horizontal deformation model of the Chinese continent is comparable with the results of the GPS observation. It implicates that the collision and compression between India and Eurasia Plates is the main driving force of the horizontal deformations of the Chinese continent. It is also shows that the patterns of the continental deformation are controlled by many factors such as the dynamical parameters of the lithosphere and the boundary conditions as well.

关 键 词：中国大陆 水平形变 GPS观测 数值模拟 板块碰撞 

分 类 号：P542.4[天文地球—构造地质学] P551[天文地球—地质学]