新乡-商丘断裂永城段第四纪活动特征分析  

Characteristics of Quaternary Activity in the Yongcheng Segment of the Xinxiang-Shangqiu Fault

作　　者：张扬 郭大伟[3] 张涛[3] 贺承广[4] 沈阳[3] 巩一帆 Zhang Yang;Guo Dawei;Zhang Tao;He Chengguang;Shen Yang;Gong Yifan(Institute of Geology,China Earthquake Administration,Beijing 100029,China;Henan Earthquake Agency,Zhengzhou 450016,China;HenNan Aero Geophysical Survey and Remote Sensing Center,Zhengzhou 450053,China;Henan Institute of Geological Survey,Zhengzhou 450001,China)

机构地区：[1]中国地震局地质研究所,北京100029 [2]河南省地震局,郑州450016 [3]河南省航空物探遥感中心,郑州450053 [4]河南省地质调查院,郑州450001

出　　处：《震灾防御技术》2022年第2期208-218,共11页Technology for Earthquake Disaster Prevention

基　　金：中央公益性科研院所基本科研业务专项(IGCEA1902);中国地震局城市活动断层探测与地震危险性评价项目;河南省地震构造探查工程。

摘　　要：新乡-商丘断裂是河南省中北部一条规模较大、切割较深的区域性隐伏断裂,为查明新乡-商丘断裂永城段的浅部构造特征和上断点最新活动时代,在永城段开展浅层人工地震勘探工作,获得2条高分辨率、高信噪比的地震反射剖面,通过地震勘探和钻孔联合剖面探测,并结合区域地质资料对新乡-商丘断裂永城段的上断点位置及活动性进行研究,揭示本断裂上断点进入了第四系上更新统底界,推测其最新活动时代为晚更新世早、中期,是一条隐伏活动断裂。The Xinxiang-Shangqiu fault is a large-scale and deep-cut regional concealed fault in the central and northern part of Henan Province.In order to find out the shallow structure features of the Yongcheng segment of the Xinxiang-Shangqiu fault and the latest active age of the upper breakpoint,two shallow artificial seismic surveys were carried out in the Yongcheng segment and two seismic reflection profiles with high-resolution and high signal-to-noise ratio were obtained,this paper studies the location and activity of the upper breakpoint of the Yongcheng segment of the Xinxiang-Shangqiu fault by combining seismic exploration,borehole survey and regional geological data,and reveals that the upper breakpoint of this fault has entered the bottom boundary of the upper Pleistocene quaternary,it is speculated that the latest active age is early and middle Late Pleistocene,and it is a buried active fault.

关 键 词：浅层地震勘探 最新活动时代 钻孔联合剖面 活动断层 

分 类 号：P315.2[天文地球—地震学]