地球动力学问题的数值模拟研究——以青藏高原现今隆升研究为例

以青藏高原地区为研究对象，考虑活动地块分区和主要断裂带，建立能反映地表起伏和分层结构的岩石圈三维粘弹性有限元模型。选取合适的模型参数、边界条件和加载条件进行计算，模拟了青藏高原地区的现今垂直隆升速率。研究表明，印度板块对欧亚板块的向北推挤作用是高原隆升的主要动力源。下地壳和岩石圈上地幔在印度板块的向北推挤下不断增厚，从而维持青藏高原地区现今的持续隆升状态。

Numerical simulation of geodynamic problems-Take present uplift of Qinghai-Tibet plateau as example

Consideringthe distribution of active block and major fault zones in Chinese mainland, the three-dimensional viscoelastic finite element model of Qinghai-Tibet plateau is established which reflects the surface relief and lithosphere layered structure. The appropriate model media parameters, boundary conditions and loading conditions are selected for numerical cal- culation, and the present vertical uplift rate of Qinghai-Tibet plateau is simulated. The research result indicates that the northward push of Indian plate to Eurasian plate is the main power source of the uplift of Qinghai-Tibet plateau. Under the northward push of the Indian plate, the lower crust and lithospheric mantle thicken continuously, thus maintains the pres- ent continuous uplift state of Qinghai-Tibet plateau.