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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.
The continental lithosphere is regarded as a thin layer controlled by the exponential law. It creeps on the lower viscous asthenosphere and its movement is restricted to a boundary model with a similar structure to the East Asian continent Among the trapezoidal frame. Assuming that the Indian plate is moving northwards at a constant rate, it is considered as the main driving force for the uplift of the Tibetan Plateau. The evolution process of the extrusion uplift in the Qinghai-Tibet Plateau was studied by means of numerical simulation. The numerical simulation of the uplift was denudated and corrected. The results show that the topography produced by the extrusion model is in good agreement with the topography of the modern Tibetan Plateau and its adjacent areas. At the same time, it also shows that the process of extrusion and uplift is restricted by many factors (such as mechanical properties of lithosphere, boundary conditions and denudation). The uplift of the plateau reflected by the simulation is not uniform both in space and time The evolutionary process.