大地测量与地球动力学2011，Vol.31Issue(3)：8-14,7.
流变特性对青藏高原构造变形影响的数值模拟
NUMERICALLY MODELING THE INFLUENCE OF RHEOLOGICAL PROPERTIES ON TECTONIC DEFORMATION OF TIBET PLATEAU
摘要
Abstract
In order to analyze the effects of the rheological properties against the contemporary tectonic deformation of the Tibet plateau, we carries out numerical simulation by building up a 3-D finite element viscoelastic model which use the standard linear solid model' s constitutive relation. The results show following characteristics. 1 ) Under the control of rheological mechanism of crustal medium, the eastward displacement components become bigger and bigger from west to east in the Tibet plateau. The maximum appears in the region south to Ganzi-Yushu-Xianshuihe faults, it implies that the mass under the Tibet plateau flow eastward. 2) The model simulated contemporary tectonic movement characteristics in this region which show that in the middle and south part of the rhombus block,the southwest parts of Sichuan-Yunnan region clockwise rotate around the Himalaya eastern tectonic joint.The crust moves southeastward in the east while southwestward in the west. 3) The results of two models with stronger rheological property in middle crust and in lower crust respectively have similar characteristics: both can model the eastward flow in plateau and clockwise rotation around the eastern Himalayan syntax. 4) The rheological properties play an important role in the tectonic deformation of Tibet plateau.关键词
青藏高原/三维有限元模型/流变特性/构造变形/数值模拟Key words
Tibet plateau/ 3-D finite element model/ theologic property/ tectonic deformation/ numerical modeling分类
天文与地球科学引用本文复制引用
陈连旺,詹自敏,叶际阳,李妍..流变特性对青藏高原构造变形影响的数值模拟[J].大地测量与地球动力学,2011,31(3):8-14,7.基金项目
中国地震局地震行业专项(200708046) （200708046）
地震科学联合基金(105109) （105109）
