高密度电法在固原清水河一带水文地质调查中的应用  

High-Density Electrical Method in Qingshuihe Area of Guyuan Application in Hydrogeological Survey

作　　者：李陇锋 乔得福 姜鸿 路利春 LI Longfeng;QIAO Defu;JIANG Hong;LU Lichun(the Second Geological and Mineral Exploration Institute of Gansu Bureau of Geology and Mineral Resources,Lanzhou 730020,China;Beijing GEOCMW Geophysical Exploration Engineering Technology CO.Ltd,Xi'an 710061,China;The No.2 Comprehensive Geophysical Prospecting Brigade Shaanxi Geological Mining Co.Ltd,Xi'an 710016,China)

机构地区：[1]甘肃省地矿局第二地质矿产勘查院,兰州730020 [2]北京中矿大地地球探测工程技术有限公司,西安710061 [3]陕西地矿第二综合物探大队有限公司,西安710016

出　　处：《地质装备》2020年第4期24-29,共6页Equipment for Geotechnical Engineering

摘　　要：为查明固原市清水河一带浅部(200m以内)岩性分层、水体赋存及构造展布等情况,在该区域近东西向布设了一条高密度电法剖面。通过研究分析,初步认为清水河河床为泥层构成的古沉积盆地边缘,向西盆地逐渐变深,砂砾层、黄土层沉积厚度逐渐变厚。研究区内由上至下分四个电性层,水体呈潜水—承压水双层结构赋存,断裂构造共发现两条,其中清水河断裂(F3)位于清水河河床东侧河床阶地与黄土丘陵接触部位,该断裂形成早于清水河河床形成,为张性断裂,向东倾。In order to find out the lithological stratification,water body occurrence and structural distribution in the shallow part(within 200m)of Qingshuihe area in Guyuan City,a high-density electrical method profile was laid in this area near the eastwest direction.Through research and analysis,it is preliminarily believed that the river bed of Qingshui River is the edge of a paleo-sedimentary basin composed of mud layers.The westward basin gradually deepens,and the thickness of the gravel layer and loess layer gradually increases.The study area is divided into four electrical layers from top to bottom.The water body exists in a double layer of confined water.A total of two fault structures are found.Among them,the Qingshuihe fault(F3)is located on the east side of the Qingshuihe river bed terrace and in the loess hilly area,this fault was formed earlier than the Qingshuihe river bed and is a tensile fault which is inclined to the east.

关 键 词：高密度 电法 地电结构 水文特征 断裂构造 

分 类 号：P631.32[天文地球—地质矿产勘探]