太康隆起南缘新郑-太康断裂的新生代活动形迹与地震活动

发布时间：2018-02-13 14:54

本文关键词： 活动断裂新郑-太康断裂太康隆起许昌-太康断裂地震　出处：《地震地质》2017年01期 　论文类型：期刊论文

【摘要】：在对比分析太康地区7个钻孔的新近纪地层及其底界基础上,对101条共4 991km长的浅层地震剖面进行了追踪解释,结果显示:沿太康隆起南缘新郑市—太康县一带发育1条新生代活动的区域性隐伏断裂,控制着太康隆起与周口凹陷的分界,可称为新郑-太康断裂。该断裂由东、西2支组成。西支断裂总体走向NW,断面NE倾,长度超过140km;东支断裂走向NW-NEE,断面倾向SW-SSE,长约50km。2条支断裂均断错了新近系的底界,局部向上延伸至第四系。断裂东、西2支的叠合地带可能为应力累积区,现代地震主要发生在这一部位。
[Abstract]:On the basis of comparative analysis of Neogene strata and bottom boundaries of 7 boreholes in Taikang area, 101 shallow seismic profiles with a total length of 4991 km are traced and interpreted. The results show that there is a Cenozoic active regional hidden fault along the southern margin of Taikang uplift, which controls the boundary between Taikang uplift and Zhoukou depression and can be called Xinzhou-Taikang fault. The fault strike of the eastern branch is NW-NEE, the fault section inclines to SW-SSE, and the fault of about 50km.2 branches breaks the bottom boundary of Neogene and extends upward to the Quaternary system. The superimposed zone of the west two branches may be the stress accumulation area, where modern earthquakes mainly occur.
【作者单位】：河南省地震局;中国石油大学(北京)地球物理与信息工程学院;
【基金】：我国地震重点监视防御区活动断层地震危险性评价:许昌-太康断层活动构造探测与河南省地震构造编图项目共同资助
【分类号】：P315.2

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