摘要
2013年芦山M 7.0级地震发生后,龙门山断裂带南段的地震活动性及发震能力受到了广泛关注。通过野外调查和地球物理探测,对龙门山断裂带南段的后山断裂即耿达—陇东断裂的活动特征进行了调查,研究结果显示,耿达—陇东断裂线性特征较差,断层形迹模糊,断错地貌不甚发育,仅见到宽约60 m的断层破碎带,断裂活动性较弱,在耿达乡断层未断错河流的T3级阶地,因此推断该断裂为早—中更新世活动断裂。
After the 2013 M7. 0 Lushan Earthquake, the seismogenic activity of the south section of the Longmen- shan fault zone has been widely concerned. According to the geological and geomorphic investigation of the Gengda- Longdong fault, which is the post mountain fault of the Longmenshan fault zone, the Gengda-Longdong fault has a poor developed fault landform and a fault fracture zone about 60 m width. It is found that the Gengda fault has poor linear characteristics and does not dislocated the T1, T2 and 33 terrace in Gengda area. shows that the Gengda - Longdong fault is a weak active fault in the Quaternary and is an early middle active fault. Key words：
作者
王明明
马超
李大虎
汤才成
黄成程
WANG Mingming MA Chao LI Dahu TANG Caicheng HUANG Chengcheng(Earthquake Administration of Sichuan Province, Sichuan Chengdu 610041, China Sichuan Seistech Corporation, Ltd. , Sichuan Chengdu 610041, China)
出处
《四川地震》
2017年第1期1-5,共5页
Earthquake Research in Sichuan
关键词
龙门山断裂带
耿达-陇东断裂
断裂活动性
The Longmenshan Fault
Gengda-Longdong fault
fault activity - Longdong This study Pleistocene
