渭河盆地北缘断裂东段将军山—白水断裂活动性研究  

Activity of Jiangjunshan-Baishui fault in the eastern segment of the northern margin fault of Weihe Basin

作　　者：姚晨辉 李钰强 YAO Chenhui;LI Yuqiang(Northwest Engineering Corporation Limited,Power China,Xi'an 710065,Shaanxi,China)

机构地区：[1]中国电建集团西北勘测设计研究院有限公司,陕西西安710065

出　　处：《地震工程学报》2023年第1期199-208,共10页China Earthquake Engineering Journal

摘　　要：将军山—白水断裂是渭河盆地北缘断裂东段的一分支,位于将军山、东太白山山前,向北东延伸至白水县境内,已有资料及研究成果认为其为晚更新世活动断裂。通过地貌地质调查、音频大地电磁法勘探、浅层地震勘探、钻孔联合剖面探测、第四纪沉积物年代测试等方法,对将军山—白水断裂的展布与活动性进行研究。结果表明该断裂总体走向为NE向,倾向S,为一山前隐伏断裂,最新活动时代为中更新世晚期,未发现晚更新世以来活动的证据,判断其为中更新世活动断层。The Jiangjunshan-Baishui fault is a branch of the eastern section of the northern margin fault of the Weihe Basin. It is located in front of Jiangjun Mountain and East Taibai Mountain and extends northeast to Baishui County. The existing data and research results suggest that the Jiangjunshan-Baishui fault is an active fault in the Late Pleistocene. In this paper, the distribution and activity of the fault were studied based on some methods such as geomorphological and geological surveys, shallow seismic exploration, composite drilling section exploration, and Quaternary sediment dating. The results show that the Jiangjunshan-Baishui fault, with an overall trend of NE-dipping S, is a piedmont buried fault. The latest active age of the fault is the late Middle Pleistocene. No evidence of activity has been found since the Late Pleistocene. It is therefore concluded that the Jiangjunshan-Baishui fault is an active fault in the Middle Pleistocene.

关 键 词：渭河盆地 将军山—白水断裂 浅层地震勘探 钻孔联合剖面 断裂活动性 

分 类 号：P315.2[天文地球—地震学]