摘要
岷山隆起为一第四纪强烈抬升区，构成川西高原的西界。岷山隆起的东、西边界分别受岷江断裂与虎牙断裂的控制，为地震活动带，南部向龙门山构造带过渡。岷江断裂北段的第四纪活动始于距今２Ｍａ以前，为一逆走滑断层，观测到的左旋位移量为２．４ｋｍ，左旋滑动速率为１ｍｍ／ａ。岷江断裂控制了沿隆起西界分布的地震活动，包括１９３３年叠溪和１９６０年漳腊地震。
The NS-trending Minshan mountain in Northwestern Sichuan is an active Quatemay uplift.Its western and eastern boundaries are controlled by the active Minshan and Huya faults, respec-tively. The northern segment of Minshan fault has been active since 2 Ma ago. It is a reversefault with left－lateral strike-slip component. The strike-slip displacement is about 2.4 km with a1mm／a slip rate since 2 Ma, determined by matching offset placer gold mine with its motherlode. The Minshan and Huya faults are the major seismogenic structures in the region.
出处
《地震地质》
EI
CSCD
北大核心
1994年第4期429-439,共11页
Seismology and Geology
基金
地震科学联合基金
关键词
岷山隆起
岷江断裂
虎牙断裂
构造地貌
: Sichuan, Minshan uplift, Minjiang fault , Huya fault,Tectonic geomor phology
