济南岩体周边裂隙岩溶水水化学特征与离子来源研究  

Hydrochemical characteristics and ion sources of karst water in fissures around Jinan rock mass

作　　者：高兵艳 彭文泉 胡彩萍 王涛 宋津宇 左含月 董娜 GAO Bingyan;PENG Wenquan;HU Caiping;WANG Tao;SONG Jinyu;ZUO Hanyue;DONG Na(No.1 Institute of Geology and Mineral Resources of Shandong Province,Jinan 250110,Shandong,China;Shandong Engineering Laboratory for High-Grade Iron Ore Exploration and Exploitation,Jinan 250110,Shandong,China;No.801 hydrogeological Engineering Geological Brigade of Shandong Provincial Exploration Bureau of Geology and MineralResources,Jinan 250100,Shandong,China;Hebei Geo University,Shijiazhuang 050031,Hebei,China)

机构地区：[1]山东省第一地质矿产勘查院,山东济南250110 [2]山东省富铁矿勘查技术开发工程实验室,山东济南250110 [3]山东省地矿局八○一水文地质工程地质大队,山东济南250100 [4]河北地质大学,河北石家庄050031

出　　处：《城市地质》2023年第4期40-49,共10页Urban Geology

基　　金：山东省财政地质勘查项目“济南岩体地质特征及水文地质条件研究”(鲁勘字[2021]20号);科创项目“济南岩体周边矿泉水成因机理与应用研究”(KC202107);第六届中国科协青年人才托举工程项目(YESS20210109)联合资助。

摘　　要：济南岩体是山东省中部典型的中生代地质体,其周边裂隙岩溶水发育,查明济南岩体周边裂隙岩溶水水化学特征及主要离子来源,对裂隙岩溶水的开发利用具有重要意义。以济南岩体周边裂隙岩溶水为研究对象,通过研究地层岩性、裂隙岩溶发育特征、主要离子含量及变化特征、水化学类型等,利用Pearson相关性分析、Gibbs图解、主要离子比例分析、Mg/Ca摩尔比分析等方法推断离子来源。研究发现:区内裂隙岩溶水中Ca^(2+)、Mg^(2+)、Na+、SO_(4)^(2-)、Cl^(-)、TDS含量,从岩体南、东、西3侧至齐河—天桥一带,再到桃园—鸭旺口一带,为逐渐增加的趋势,HCO_(3)^(-)变化趋势与之相反;水化学类型有5种,存在由岩体南侧HCO_(3)^(-)Ca型,至东、西2侧的HCO_(3)^(-)Ca·Mg型,到齐河—天桥一带的SO_(4)^(-)Ca型,再到桃园—鸭旺口一带的SO_(4)·Cl—Na·Ca型不断溶滤的变化趋势;岩体南、东、西3侧离子主要来源水岩作用的方解石和白云石溶滤,北侧齐河—天桥一带和桃园-鸭旺口一带离子主要来源于蒸发岩溶解。Jinan rock mass is a typically Mesozoic geological body in the central part of Shandong Province,and its surrounding fissure karst water is well developed.It is of great significance to find out the hydrochemical characteristics and main ion sources of the fissure karst water around Jinan rock mass.This paper takes the fissure karst water around Jinan rock mass as the research object.By studying the formation lithology,the development characteristics of fissure karst,the content and variation characteristics of main ions,and the hydrochemical types,the origin of ions was inferred by Pearson correlation analysis,Gibbs diagram,main ion ratio analysis,Mg/Ca mole-ratio analysis and other methods.The results show that:Ca^(2+),Mg^(2+),Na+,SO_(4)^(2−),Cl^(-)and TDS increase from the south,east and west sides of the rock mass to Qihe-Tianqiao area and then to Taoyuan-Yawangkou area,while the change trend of HCO_(3)^(−)is the opposite.There are five hydrochem-ical types,including HCO_(3)^(-)Ca type on the south side of the rock mass,HCO_(3)^(-)Ca·Mg type on the east and west side,SO_(4)^(-)Ca type on the Qihe-Tianqiao area,with the variation trend of SO_(4)·Cl^(-)Na·Ca type continuously leaching in Taoyuan-Yawangkou area.In the south,east and west of the rock mass,the ions mainly come from the dissolution of calcite and dolomite by water-rock interaction.In the north,the ions mainly come from the dissolution of evaporative karst in Qihe-Tianqiao area and Taoyuan-Yawangkou area.

关 键 词：裂隙岩溶水 水化学 离子来源 济南岩体 

分 类 号：P641.13[天文地球—地质矿产勘探]