弥河下游浅埋古河道的勘探识别  

Exploration identification of the shallow-buried palaeochannel in the lower reaches of the Mihe River

作　　者：郭龙凤 陈德培 魏长勇 王刚[1] GUO Long-Feng;CHEN De-Pei;WEI Chang-Yong;WANG Gang(College of Water Conservancy&Civil Engineering,Shandong Agricultural University,Tai'an 271000,China;Shuifa Planning and Designing Co.,Ltd.,Jinan 250000,China;Shandong Tai'an Hydrology Bureau,Tai'an 271000,China)

机构地区：[1]山东农业大学水利土木工程学院,山东泰安271000 [2]水发规划设计有限公司,山东济南250000 [3]山东省泰安市水文局,山东泰安271000

出　　处：《物探与化探》2020年第4期863-869,共7页Geophysical and Geochemical Exploration

基　　金：国家自然科学基金项目(41202174);山东省自然科学基金项目(2014ZRB019D0)。

摘　　要：在分析研究区古河道成因、地质条件、地球物理特征的基础上,采用电测深法结合水文地质钻探对区内古河道进行勘探。电测深曲线及其一维反演表明,古河道呈现相对高阻特征,平均厚度23 m。从电阻率这一综合电性参数的角度分析了探测范围内古河道的空间分布特点:整体呈河流相沉积,岩性以细砂、中粗砂和砂砾石为主。电阻率图像反映的古河道空间特征与钻孔资料揭露的古河道特性基本一致。本次勘探工作重建了研究区第四系地质剖面,为后期古河道资源的合理利用和保护奠定了基础。Based on the analysis of the origin,geological conditions and geophysical characteristics of the ancient river channel in the study area,the electrical sounding method and hydrogeological drilling are used to explore the ancient river channel in the area.The electrical sounding curve and its one-dimensional inversion show that the ancient channel is characterized by relatively high resistivity with an average thickness of 23 m.From the perspective of resistivity,i.e.,the comprehensive electrical characteristic parameter,the authors analyzed the spatial distribution characteristics of the palaeochannel within the detection range.The palaeochannel is deposited as a river facies on the whole,and the lithology mainly includes fine sand,medium-coarse sand and sand gravel.The spatial characteristics of the palaeochannel reflected in the resistivity image are basically consistent with the characteristics of palaeochannel revealed by the borehole data.This exploration work has reconstructed the Quaternary geological section of the study area,and laid a solid foundation for rational utilization and protection of the palaeochannel resources.

关 键 词：弥河 古河道 电测深法 一维反演 电阻率 

分 类 号：P631[天文地球—地质矿产勘探]