酒泉盆地北侧金塔南山北缘断裂西段全新世活动特征  

Active Faulting Features in Holocene of the West Segment of the Jintananshan North-margin Fault at the North of Jiuquan Basin

作　　者：何文贵[1,2] 袁道阳[1,2] 王爱国[1,2] 刘兴旺[1,2] 张波[1,2] 

机构地区：[1]中国地震局兰州地震研究所,甘肃兰州730000 [2]中国地震局地震预测研究所兰州科技创新基地,甘肃兰州730000

出　　处：《地震》2012年第3期59-66,共8页Earthquake

基　　金：国家自然科学基金(40872132);中国地震局中国大陆7~8级地震危险性预测研究专项(M7专项)共同资助;中国地震局兰州地震研究所论著号:LC20120

摘　　要：金塔南山北缘断裂是酒泉盆地北侧的一条重要的活动断裂,断裂西起梧桐墩西北,向东经长山、瓜勾山、鸳鸯池水库、大口子山到红墩以西,长约60km,走向近东西,倾向北或南,倾角60°～80°。断裂活动方式以挤压逆冲为主,兼有左旋走滑特征。通过对现场断错地貌的调查和探槽开挖,发现金塔南山北缘断裂西段晚第四纪活动强烈,并有古地震发生。Jintananshan north-margin fault is an important active fault at the north of Jiuquan Basin.The fault starts from the northwest of Wutongdun in the west,then passes through Changshan,Guagoushan,Yuanyangchishuiku,Dakouzi,and ends in the east of Hongdun.The main trending is near EW with length 60 km,dip is south or north,and the dip angle is 60~80 degree.The active manner of the fault is mainly thrust with left-lateral strike-slip features.According to field geomorphic investigation and trench excavation,we found strong active evidence at the west segment of the Jintananshan north-margin fault.Paleo-earthquakes have also be found there.

关 键 词：金塔南山北缘断裂 活动断裂 古地震 全新世 

分 类 号：P315.7[天文地球—地震学]