曾金艳^1,2,,
李自红^1,2,,,
陈文³,
闫小兵^1,2
1. 山西省地震局, 山西 太原 030002
2. 太原大陆裂谷动力学国家野外科学观测研究站, 山西 太原 030025
3. 北京美辰建筑抗震工程有限公司, 北京 100021

基金项目: 中国地震局地震预测研究所专项项目（批准号：2017IES0101）和运城市地震小区划项目（批准号：201601）共同资助


详细信息

作者简介: 曾金艳, 女, 49岁, 高级工程师, 主要从事活动构造、地震工程和地球物理勘探研究, E-mail:13903412202@163.com

通讯作者: 李自红, E-mail:sxsdzjgcy@163.com

中图分类号: P546

收稿日期:2019-06-29
修回日期:2019-11-05
刊出日期:2020-01-25

Study on the activity characteristics of the south bank fault of Yuncheng Salt Lake in Yuncheng Basin since the Late Quaternary

Zeng Jinyan^1,2,,
Li Zihong^1,2,,,
Chen Wen³,
Yan Xiaobing^1,2
1. Earthquake Administration of Shanxi Province, Taiyuan 030002, Shanxi
2. National Continental Rift Valley Dynamics Observatory of Taiyuan, Taiyuan 030025, Shanxi
3. Mei Chen Building Seismic Engineering Limited Liability Company of Beijing, Beijing 100029


More Information

Corresponding author: Li Zihong,E-mail:sxsdzjgcy@163.com

MSC: P546

--> Received Date: 29 June 2019
Revised Date: 05 November 2019
Publish Date: 25 January 2020


摘要
摘要:盐湖南岸断层位于运城市盐湖南岸，在浅层地震勘探的基础上，通过钻孔联合剖面勘探和钻孔样品年龄测试，获得断层的上断点埋深、断层标志层的断距以及地层沉积年龄等数据，在此基础上分析了盐湖南岸断层的晚第四纪活动特征。研究表明，盐湖南岸断层在55.7±0.43 ka B.P.以来没有发生明显的活动，断层的活动时代为晚更新世早、中期。断层在晚第四纪以来经历过2次构造活动期和2次间歇期，间歇时间为约16000 a和55700 a，在2次活动期间断层活动程度存在差异，晚更新世早期断层活动较强，中期活动相对减弱。晚更新世以来断层的平均滑动速率为0.0276 mm/a，属弱活动断层。
关键词: 盐湖南岸断层/
晚第四纪/
活动期次/
滑动速率/
活动特征

Abstract:The south bank fault of Yuncheng Salt Lake is located on the south bank of Yuncheng Salt Lake in Yuncheng City (35.02°N, 110.98°E). To further investigate its activity characteristics since the Late Quaternary, the borehole profile exploration together with the dating of borehole samples were carried out based on the shallow seismic exploration. The fault activity characteristics since the Late Quaternary was then analyzed in terms of the buried depth of the upper breakpoint of the fault, the distance of the fault marker layer and the sedimentary age of the stratum. The results indicate that since 55.7±0.43 ka B.P., no obvious activity has happened in the South Bank Fault of Yuncheng Salt Lake, and the activity age of the fault is the early and middle stage of the Late Pleistocene. The fault has experienced two periods of tectonic activity and two periods of intermittence since the Late Quaternary, with the intermittent of ca.16000 a and 55700 a. However, during the two activities, the degree of fault activity was different. In the early stage of Late Pleistocene, the fault activity was obviously stronger than that in the middle stage. The average slip rate of the fault since the Late Pleistocene is 0.0276 mm/a, which is a weak active fault.
Key words:the south bank fault of Yuncheng Salt Lake/
Late Quaternary/
active period/
slip rate/
activity characteristics



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