山东省地下水氟富集规律及其驱动机制  

Driving mechanisms of fluorine ennrichment characteristics in groundwater,Shandong Province

作　　者：刘春华[1] 王威 杨丽芝[1] 朱恒华[1] 郭艳[1] 马瑜宏[1] 郭晶[1] 刘柏含 LIU Chunhua;WANG Wei;YANG Lizhi;ZHU Henghua;GUO Yan;MA Yuhong;GUO Jing;LIU Bohan(Shandong Institute of Geological Survey,Shandong Engineering Research Center for Geochemistry and Pollution Prevention and Control of Land Quality,Jinan,Shandong250014,China;NO.1 Institute of Geology and Mineral Resources of Shandong Province,Shandong Engineering Laboratory for High-Grade Iron Ore Exploration and Exploitation,Jinan,Shandong250109,China)

机构地区：[1]山东省地质调查院,山东省土地质量地球化学与污染防治工程技术研究中心,山东济南250014 [2]山东省第一地质矿产勘查院,山东省富铁矿勘查技术开发工程实验室,山东济南250109

出　　处：《地质学报》2021年第6期1962-1972,共11页Acta Geologica Sinica

基　　金：国家重点研发计划项目(编号2017YFC0406106);国家自然科学基金项目(编号41902265)、中国地质调查局项目(编号1212010634603);山东省地勘基金项目联合资助的成果。

摘　　要：本文以生命必需元素氟为研究对象,选择地方性氟病分布典型、地下水类型分布全面的山东省全境为研究区,依托2006~2016年间采集的4321件地下水无机分析数据,综合运用数理统计分析、离子比值分析、水化学平衡体系分析,详细研究了山东省高氟地下水的分布特征和富集机制。结果表明:山东省浅层高氟地下水集中连片分布于胶莱盆地和鲁西南平原地区地势低洼地带,地下水氟含量超过1mg/L的分布面积13227km^(2),最大值22mg/L;深层承压孔隙水高氟区集中分布于平原盆地中心的德州、滨州、菏泽等地深层承压孔隙水水位降落漏斗区,氟含量超过2mg/L的分布面积15086km^(2),最大值7.5mg/L,地下水开采是驱动深层承压孔隙水氟富集的主要因素;不同类型地下水氟平均含量从大到小依次是深层承压孔隙水、浅层松散岩类孔隙水、侵入岩变质岩基岩裂隙水、碳酸盐岩类裂隙岩溶水、碎屑岩类孔隙裂隙水;深层承压孔隙水F-含量与Ca2+含量呈明显的负相关,其他类型地下水F-含量与Ca2+含量相关关系不明显。综合得出:山东省高氟地下水形成受地貌与地质构造部位、含水介质地球化学特性、人类地下水开采等三方面因素共同驱动,含氟矿物的溶解是地下水中氟的物质来源,淋滤、蒸发浓缩、水岩相互作用使得地下水氟含量进一步升高,氟-钙拮抗作用机制最终决定地下水中氟含量。此研究揭示了控制不同类型地下水氟富集的关键因素,深化了氟在地下水中化学行为的认识。This article investigates the distribution of the essential elemental fluorine in groundwater from the entire area of Shandong Province,which has endemic fluorine disease.Based on 4321groundwater inorganic analysis data collected between 2006to 2016,the distribution characteristics and driving mechanisms of fluorine enrichment in groundwater in Shandong Province were studied in detail using mathematical statistical analysis,ion ratio analysis,and water chemical equilibrium system analysis methods.The results show that the shallow high fluoride groundwater was contiguously distributed in the low-lying areas of the Jiaolai basin and the Southwestern Plain of Shandong.The area where shallow groundwater fluorine concentration exceeds 1mg/L is 13227km2,with a fluorine concentration maximum of 22 mg/L.The deep pore confined groundwater with high fluoride is concentrated in the deep groundwater depression funnel areas of Dezhou,Binzhou and Heze.The area where deep pore confined groundwater fluorine concentration exceeds 2mg/L is 15086km2,with a fluorine concentration maximum of 7.5mg/L.Groundwater extraction is the main factor driving fluorine enrichment in deep pore water.The average concentration of fluorine in different types of groundwater in decreasing order is deep pore confined groundwater,shallow pore groundwater,bedrock fissure water,fissured karst water,and pore fissure water.The fluoride concentration of deep pore confined groundwater has a significant negative correlation with Ca2+concentration that is not obvious in other types of groundwater.It is concluded that the formation of high fluoride groundwater in the Shandong Province is driven by three factors i.e.geomorphology and geological structure,geochemical characteristics of the aquifer medium,and human groundwater extraction.Leaching,evaporation and water-rock interactions further increase the groundwater fluorine content,and the fluorine-calcium incompatibility ultimately determines the fluorine content in groundwater.This study revealed the key facto

关 键 词：高氟地下水 分布特征 富集 驱动机制 山东省 

分 类 号：P641.12[天文地球—地质矿产勘探]