南华北盆地典型走滑断裂第四纪活动特征  

Quaternary Activity Characteristics of Typical Strike SlipFaults in Southern North China Basin

作　　者：王帅 张扬 赵显刚 花鑫升[4] WANG Shuai;ZHANG Yang;ZHAO Xiangang;HUA Xinsheng(Henan Earthquake Agency,Zhengzhou 450016,China;Henan City Seismic and Geological Safety Engineering Technology Research Center,Zhengzhou 450016,China;Institute of Geology,CEA,Beijing 100029,China;Geophysical Exploration Center,CEA,Zhengzhou 450002,China)

机构地区：[1]河南省地震局,郑州市正光路10号,450016 [2]河南省城市地震地质安全工程技术研究中心,郑州市正光路10号,450016 [3]中国地震局地质研究所,北京市100029 [4]中国地震局地球物理勘探中心,郑州市450002

出　　处：《大地测量与地球动力学》2025年第5期447-455,共9页Journal of Geodesy and Geodynamics

基　　金：中央级公益性科研院所基本科研业务费专项(IGCEA1902);河南省科技攻关项目(232102320018,242102320043);河南省地震构造探查工程项目(YCZC-2020-950);河南省地震局第四批科技创新团队。

摘　　要：综合分析南华北盆地沈丘凹陷2条浅层地震剖面、VSP实测纵波速度数据和1条钻孔联合地质剖面,研究沈丘凹陷走滑断裂带浅部一系列负花状构造的几何学特征和可分辨的上断点深度。结果表明,该断裂向上错断第四纪地层,浅层地震勘探剖面上可分辨的上断点埋深为60 m左右,钻孔联合地质剖面可分辨的上断点埋深为38.6~40.1 m,推断该断裂错断中更新世地层。探测结果揭示该断裂为一组呈NWW向排列的雁列状左旋走滑断裂,说明南华北盆地第四纪具有NW向的走滑剪切作用,表明受秦岭造山控制的北西向构造体系在第四纪以来仍有活动,对分析华北板块东部平原区盆地演化具有重要意义。By conducting a comprehensive analysis of two shallow seismic profiles,VSP-measured P-wave velocity data,and one drilling joint geological profile from the Shenqiu depression in the southern north China basin,this study investigates the geometric characteristics and discernible upper fault depths of a series of negative flower-like structures in the shallow part of the strike-slip fault zone.The results indicate that the fault displaces the Quaternary strata upwards,with the discernible upper fault depth on the shallow seismic exploration profile being approximately 60 meters,and the discernible upper fault depth on the drilling joint geological profile ranging from 38.6 to 40.1 meters,suggesting that the fault displaces the middle Pleistocene strata.The exploration findings reveal that the fault is a set of left-lateral strike-slip faults arranged in a NWW direction,resembling a line of geese.This indicates that the southern north China basin has experienced NW-directed strike-slip shearing during the Quaternary,suggesting that the NW-directed tectonic system,controlled by the Qinling orogeny,has remained active since the Quaternary.This has significant implications for analyzing the evolution of the basins in the eastern plains of the north China block.

关 键 词：南华北盆地 沈丘凹陷 浅层地震勘探 钻孔联合地质剖面 走滑断裂 

分 类 号：P313[天文地球—固体地球物理学]