摘要
论述了祁连山构造带新生代以来的变形过程及形成机制。研究表明： 祁连山构造带的变形过程是在欧亚大陆与印度大陆碰撞汇聚作用下发生和发展的， 其变形过程与整个青藏高原的隆升过程同步进行。其中阿尔金断裂在其东段的走滑贯通对祁连山－ 河西走廊地区的构造运动影响很大。上新世末或第四纪初阿尔金断裂东段的走滑导致了祁连山地区应力场的旋转， 进而增大了沿 Ｎ Ｗ Ｗ 向主断裂的水平走滑分量。它是引起主断裂发生走滑的重要原因之一。
In this paper, the deformation process and deformation mechanism of Qilianshan Structure Belt, since Cenozoic era, have been discussed. The results show that the collision between India and Asia appears to be the cause of neotectonic deformation of Qilianshan Structure Belt. Its deformation process is consistent with uplift process of Tibet block, among them,one of the most important causes induced by deformation is the strike-slip movement in the eastern segment of Altyn Tagh fault. The strike-slip movement led to the rotation of stress field in the Qilianshan region and increase of horizontal strike-slip component along the NWW -trending main faults. It is one of the main reasons that induced strike-slip movement of main fault zone.
出处
《华南地震》
1999年第2期50-56,共7页
South China Journal of Seismology
基金
地震科学联合基金资助课题
关键词
新构造运动
祁连山构造带
构造变形机制
断层
Neotectonic movement,Deformation, Qinling-Qilian tectonic region, Qilianshan Structure Belt
