• 责任者：Luo Hao (Lanzhou Institute of Seismology ; China Earthquake Administration ; Lanzhou 730000 ; China) ; He Wengui
• 刊名：Seismology and Geology
• 出版年：2013
• 卷期：35(4)
• 关键词：断裂 ; fractures ; 滑移速率 ; slip rates ; 祁连山 ; Qilian Mountains
• 页码：p.765-777
• 图表：8 illus., 22 refs.
• 分类号：0300
• issnNo：ISSN0253-4967
• isbnNo：CN11-2192/P

     The Hexi Corridor-Qilian Fault systems,the Ahyn Tagh Fault and the Haiyuan Fault jointly control the north boundary and deformation of the Qinghai-Tibet plateau.The Changma Fault,as one of the Hexi Corridor-Qilian Fault systems,is a highly active strike-slip fault,and connects the Ahyn Tagh Fault and the Haiyuan Fault.Based on the active characteristics and geometrical distribution,this fault is divided into four segments.We obtain the left-lateral strike-slip rates of three segments,which are 1.33±0.39mm/yr at the west segment,3.11 ±0.31mm/yr at the middle-west segment,and 3.68±0.41mm/ya at the middle-east segment,respectively,and the shortening rate at the west segment （0.70±0.20mm/yr）.The result shows that the sinistral slip rate of the fault is significantly increased from west segment to east segment.The activity of Changma Fault accommodates ～ 30％ reduction of Altyn Tagh Fault slip rate.The studies in this paper confirm that the sinistral slip and shortening of Changma Fault and other secondary faults in accompany with deformation inside the basin absorb most of displacement of east segment of Altyn Tagh Fault,and this structural change mode supports the hypotheses that the northeastern margin of Qinghai-Tibet plateau has a continuous crust thickening mode with lateral displacement.