鲁中山区下寒武统朱砂洞组似层状含水层成因分析  

Genetic analysis of Lower Cambrian Zhushadong Formation layered aquifer in the central mountain area of Shandong Province

作　　者：刘元晴 周乐[1] 李伟[1] 吕琳[1] 邓启军[1] 朱庆俊[1] 徐蒙 马雪梅[1] 何锦[1] 王新峰[1] LIU Yuanqing;ZHOU Le;LI Wei;LU Lin;DENG Qijun;ZHU Qingjun;XU Meng;MA Xuemei;HE Jin;WANG Xinfeng(Center for Hydrogeology and Environmental Geology Survey, China Geological Survey, Baoding, Hebei, 071051;No. 1 Institute of Geology and Mineral Resources of Shandong Province, Jinan, 250014)

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 [2]山东省第一地质矿产勘查院,济南250014

出　　处：《地质论评》2019年第3期653-663,共11页Geological Review

基　　金：国家自然科学基金资助项目(编号:41240021);中国地质调查局水工环地质调查项目(编号:DD20190259;DD20160289;DD20179262)的成果~~

摘　　要：下寒武统朱砂洞组含水层是鲁中山区主要供水目的层之一,多具承压性、成井率高,地下水富集表现出"似层状"特征。通过岩石样品化学组分取样分析、水文地质调查及资料整理、实测地层剖面、滑脱构造地质点详细观测,对朱砂洞组含水层水文地质特征进行研究。结果表明:鲁中山区朱砂洞组含水层厚度20～80 m,且自东向西呈减薄趋势,含水层多具承压性。朱砂洞组含水层碳酸盐岩可溶组分含量高达84.6%,构成了溶蚀发育的物质基础;沿太古宇—寒武系不整合面发育的滑脱构造带,朱砂洞组底部顺层形成不同规模的层间虚脱、构造带内部则发育碎裂岩带或揉皱带。外源补给、径流的地下水在溶蚀空隙、层间虚脱、碎裂岩带及揉皱层间空隙内赋存,形成了地下水相对均一的"似层状"富集状态。The lower Cambrian Zhushadong Formation aquifer is one of the important water supply objective aquifer in the central mountain area of Shandong Province. It is characterized by press bearing, high drilling success rate. The enrichment property of groundwater in the aquifer is showing "stratiform" state. Hydrogeological characteristics of the Zhushadong Formation aquifer were recognized based on analyzying of chemical composition of rock samples, hydrogeological surveying and data collating, measuring stratigraphic sections, observing decollement structure points in detail. The results show that the Zhushadong Formation aquifer thickness is between 20~80 m with tendency of thinning from east to west, the aquifer has always pressure-bearing property. The content of soluble components in aquifer’s carbonate rocks is as high as 84.6% and constitutes the foundation of aquifer karst. Decollement structure developed along Archean- Cambrian unconformity surface forms some different scales interlayer collapses at the bottom of the Zhushadong Formation, and cataclastic rock belt and small folds belt in decollement zone. Groundwater with extraneous recharge can store in karst pores, interlayer collapses, cataclastic rock belt and interlayer fracture in small folds belt. It makes the Zhushadong Formation aquifer groundwater with the enrichment property of relatively homogeneous "stratiform" state.

关 键 词：鲁中山区 朱砂洞组 岩溶水 滑脱构造 层间虚脱 

分 类 号：P641.11[天文地球—地质矿产勘探]