太原盆地田庄断裂东段探测和活动性初步研究

发布时间：2017-12-30 21:13

本文关键词：太原盆地田庄断裂东段探测和活动性初步研究　出处：《地震研究》2016年02期 　论文类型：期刊论文

【摘要】：田庄断裂为太原盆地内一条较大的隐伏断裂,采用地质调查、浅层地震勘探等方法对该断裂东段(西温庄—滨河东路)开展研究。地质调查结果显示:田庄断裂对太原断陷盆地的地貌形态有明显的控制作用,并且控制着太原盆地的沉降;浅层地震勘探结果揭示:该断裂空间位置比原来认定的位置向北偏移了约250~600 m,并且在其上盘发育有与主断裂倾向相反的次级断裂。结合TZ2测线北侧附近"太原市活断层探测与地震危险性分析"项目中小店区钻孔联合剖面地层测年资料,认为该断裂错断了上更新统下部地层,并且上断点埋深有向浅部延展的趋势,初步认为田庄断裂的最新活动时代为晚更新世。
[Abstract]:The Tianzhuang fault is a large hidden fault in Taiyuan basin. Shallow seismic exploration and other methods are used to study the eastern section of the fault (West Wenzhuang-Binhe East Road). The geological survey results show that the Tianzhuang fault has an obvious controlling effect on the geomorphology of Taiyuan fault basin. And it controls the subsidence of Taiyuan basin. The results of shallow seismic exploration reveal that the spatial location of the fault is about 250 ~ 600 m north of the original position. In addition, secondary faults with opposite tendency to main faults were developed in the upper wall. Combined with "Taiyuan active Fault Detection and Seismic risk Analysis" near the north side of TZ2 survey line. Stratigraphic dating data of joint borehole profile in Xiaodian area of the project. It is considered that the fault faulted the lower strata of the Upper Pleistocene and the buried depth of the upper fault point has a tendency to extend to the shallow part. It is preliminarily considered that the latest active age of the Tianzhuang fault is the late Pleistocene.
【作者单位】：山西省地震局;太原大陆裂谷动力学国家野外科学观测研究站;北京美辰建筑抗震工程有限公司;
【基金】：地震行业科研专项(2014419013) 山西省自然科学基金(2015011084)联合资助
【分类号】：P542;P631.4
【正文快照】： 0引言太原市城区位于太原断陷盆地的北端,盆地内断裂发育,其中田庄断裂就是盆地内一条规模较大的隐伏断裂。2007年太原市完成了活断层探测与地震危险性评价项目,由于经费和当时城市规划等原因,未对该断裂做详细的研究,但随着太原城市发展的加快以及主体城区的南移,田庄断裂进

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