摘要
将大陆岩石层视为由幂指数律控制的一层薄层，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边界模型的梯形框架之中．设印度 板块以一恒定的速度向北推进，并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演化过程，并对数值模拟的隆升过程作了剥蚀修正．结果表明， 由挤压模型所产生的地形和现代青藏高原及其邻区的地形格局比较吻合．同时也表明，挤压 隆升过程受多种因素（如岩石层的力学特性、边界条件以及剥蚀作用）的制约，无论从空间还 是从时间上看，模拟所反映的高原隆升都是不均匀的演化过程．
A numerical simulation of the geodynamical process of the compression uplift of the Tibet Plateau is addressed in this paper. The continental lithosphere of the East Asia is regard as a continuum in a power law rheology. It lays on a relatively soft upper mantle and is 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 plateau's uplift. The results show that the modeled topography of the compression uplift can fit the observed pattern of this region. The results also indicate that the process of the compression uplift of the Tibet Plateau is constrained by many factors, such as the boundary conditions, the dynamical parameters of the continental lithosphere and the denudation rate as well. It is clear that the process of the plateau' s uplift is not uniform in space and time.
出处
《地球物理学报》
SCIE
EI
CAS
CSCD
北大核心
2000年第3期346-355,共10页
Chinese Journal of Geophysics
基金
国家"攀登计划"!97023103
中科院武汉动力大地测量实验室资助
关键词
青藏高原
东亚大陆
挤压隆升
剥蚀
数值模拟
Qinghai-Xizang plateau, East Asian continent, Compression uplift Denudation.
