莱芜盆地构造演化特征及水文地质意义  

Tectonic Evolutionary Characteristics and Their Hydrological Geological Significance in Laiwu Basin

作　　者：周乐[1] 刘元晴 李伟[1] 朱庆俊[1] 王新峰[1] ZHOU Le;LIU Yuan-qing;LI Wei;ZHU Qing-jun;WANG Xin-feng(Centre for Hydrogeology and Environmental Geology,China Geological 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,保定071051

出　　处：《科学技术与工程》2020年第2期519-526,共8页Science Technology and Engineering

基　　金：国家自然科学基金(41240021);中国地质调查局地质调查项目(DD20190259,DD20160289,DD20179262)。

摘　　要：为研究莱芜盆地构造演化特征及其对水文地质特征的影响,利用平衡剖面原理结合资料分析对莱芜盆地伸展速率、主要断裂活动速率进行计算,恢复了盆地构造演化史。利用96口钻孔及饮水井调查数据,将盆地岩溶水系统模式划分为“顺置式”和“逆置式”两种,并从构造位置、含水岩组类型、岩溶地下水补排条件及水化学性质对比分析其特征;结合野外地质调查,研究了枣园、吴小庄-双泉村2处受燕山期岩浆侵入影响形成的岩溶地下水富集带的水文地质特征;钻探结果,盆地部分地区古近系地层发育半固结砂砾岩,含水岩组兼具孔隙水及裂隙水特征,富水性好。To study the tectonic evolution of the Laiwu Basin,Shandong,East China,and its influence on the hydrogeological characteristics,the principle of structural balance was applied for tectonic reconstruction.Using available data,the rate of basin extension and the main fracture activity rate were calculated from which the tectonic evolution of the basin was revealed.In addition,using survey data of 96 drills and drinking wells,the local Karst groundwater system was classified into two types:the bedding type and inversion type.The propeties of these types were compared and analyzed against the structural position,aquifer types,Karst groundwater recharge,drain age conditions,and hydrochemical characteristics.Two Karst groundater concentration zones were delineated and they were affected by magma intrusion in the Yanshanian Stage of Chinese tectonic frame,and their hydrogeological characteristics in field geological survey were canvassed.Drilling results show that semi-compacted sands and conglomerates of the Paleogene are developed in some areas of the Laiwu Basin,and the acquifer is water-rich characteristic of both pore water and fractured water.

关 键 词：莱芜盆地 构造演化 平衡剖面 岩溶水系统 

分 类 号：P641.134[天文地球—地质矿产勘探]