二维地震和高密度电阻率测深揭示雄安新区浅部三维地质结构特征  

2D seismic and high-density resistivity sounding reveal the shallow three-dimensional geological structure characteristics of Xiong'an New Area

作　　者：龙慧[1] 谢兴隆[1] 李凤哲[1] 任政委[1] 王春辉[1] 郭淑君[1] LONG Hui;XIE Xing-Long;LI Feng-Zhe;REN Zheng-Wei;WANG Chun-Hui;GUO Shu-Jun(Center for Hydrogeology and Environmental Geology Survey,China Geology Survey,Baoding 071051,China)

机构地区：[1]中国地质调查局水文地质环境地质调查中心,河北保定071051

出　　处：《物探与化探》2022年第4期808-815,共8页Geophysical and Geochemical Exploration

基　　金：中国地质调查局地质调查项目(DD20189630、DD20190127);国家重点研发计划项目(2018YFC0604305)。

摘　　要：雄安新区位于冀中平原中部,地下结构具有新生界地层厚度大、成层性好、构造活动相对稳定的显著特点。为精细刻画浅层地质结构,查明断裂构造特征,提高浅部探测精度,本次研究采用二维地震和高密度电阻率测深结合的方法,取得了重要进展,主要包括:①精细刻画了工作区200 m以浅深度范围内地层结构和断裂构造空间展布特征;②构建了三维可视化地质结构模型,直观展示了调查区新生界地层起伏形态和主要断裂构造空间分布;③分析总结了城镇化高干扰背景环境下地球物理方法的探测深度、横纵向分辨率、目标体响应特征和适用性等。本次研究有效支撑和服务了雄安新区的规划、建设以及地下空间开发利用,对大厚度沉积盆地城市地下空间的地球物理探测具有借鉴意义。The Xiong'an New Area is located in the middle part of the Jizhong Plain.The Cenozoic strata in the underground structure of the area have a large thickness,good stratification,and relatively stable tectonic activities.To finely determine the shallow geological structures,ascertain the fault structure characteristics,and improve the shallow exploration accuracy,this study combined two-dimensional seismic surveys and high-density resistivity sounding and made the following important progress.①This study finely determined the geological structure and the spatial distribution characteristics of fault structures at a depth of less than 200 m in the Xiong'an New Area;②This study constructed a three-dimensional visualized geological structure model,which intuitively displays the stratigraphic fluctuation pattern of Cenozoic strata and the spatial distribution of main fault structures;③This study analyzed and summarized the application of geophysical methods under the background of urbanization-induced high disturbance,including their exploration depths,horizontal and vertical resolution,response characteristics of geological bodies,and applicability.This study effectively supports and serves the planning,construction,and underground-space development and utilization in the Xiong'an New Area and serves as a reference for the geophysical exploration of urban underground space in hugely thick sedimentary basins.

关 键 词：雄安新区 二维地震 高密度电阻率测深 三维地质结构 断裂构造 

分 类 号：P631.4[天文地球—地质矿产勘探]