四川昭觉地区优质偏硅酸地下水的特征、成因及其开发利用建议  

Characteristics,causes and development suggestions of high quality groundwater containing metasilicate in Zhaojue area,Sichuan Province

作　　者：周长松[1,2] 邹胜章 朱丹尼[1] 林永生 王佳[1] 樊连杰 李军[3] 蓝芙宁 李衍青[1] 邓日欣[1] 缪雄谊 ZHOU Changsong;ZOU Shengzhang;ZHU Danni;LIN Yongsheng;WANG Jia;FAN Lianjie;LI Jun;LAN Funing;LI Yanqing;DENG Rixin;MIAO Xiongyi(Key Laboratory of Karst Dynamics of Ministry of Land and Resources,Guangxi Karst Resources and Environment Research Center of Engineering Technology,Institute of Karst Geology,Chinese Academy of Geological Sciences,Guilin 541004,Guangxi,China;School of Environment Science and Spatial Informatics,China University of Mining and Technology,Xuzhou 221116,Jiangsu,China;Hebei Key Laboratory of Water Quality Engineering and Comprehensive Utilization of Water Resources,Hebei University of Architecture,Zhangjiakou 075000,Hebei,China)

机构地区：[1]中国地质科学院岩溶地质研究所自然资源部/广西壮族自治区岩溶动力学重点实验室广西岩溶资源环境工程技术研究中心,广西桂林541004 [2]中国矿业大学环境与测绘学院,江苏徐州221116 [3]河北建筑工程学院河北省水质工程与水资源综合利用重点实验室,河北张家口075000

出　　处：《中国地质》2022年第3期849-859,共11页Geology in China

基　　金：广西重点研发计划(桂科AB21220044、桂科AB21075002、桂科AB18050026);国家研发计划课题(2017YFC0406104);国家自然科学基金(41902261);中国地质调查局地质调查项目(DD20190825,DD20160302、DD20221758);中国地质科学院岩溶地质研究所基本科研业务费项目(2021013)共同资助。

摘　　要：【研究目的】近年来,随着生活水平的不断提高,人们对健康饮水的要求也在不断提高,寻找与开发富含H_(2)SiO_(3)等矿物质优质地下水已成为关键。【研究方法】本文以昭觉地区水文地质调查工程、地下水污染调查工程所获取的地下水化学数据为基础,探讨了昭觉地区富H_(2)SiO_(3)地下水的分布特点、元素水文地球化学特征、形成条件及成因。【研究结果】结果显示:(1)全县富H_(2)SiO_(3)(≥25 mg/L)地下水均属于低矿化度偏碱性水,分布在基底岩石为玄武岩的6个片区,H_(2)SiO_(3)含量一般介于25.74~46.04 mg/L,pH含量一般介于7.4~8.58,TDS含量一般介于49.4~333 mg/L;(2)玄武岩地下水存在HCO_(3)-Ca、HCO_(3)-Ca·Mg、HCO_(3)-Ca·Na、HCO_(3)-Ca·Mg·Na、HCO_(3)-Na等5种水化学类型,总体以HCO_(3)-Ca·Mg为主,其次为HCO_(3)-Ca,再次为HCO_(3)-Ca·Na,三者分别占总采样点数的50.00%、25.76%、12.12%;(3)全县富H_(2)SiO_(3)地下水的形成受水岩相互作用、硅酸盐矿物的分布范围及其可溶性、围岩裂隙发育程度、水源涵养及补给条件等四方面因素影响,其中水岩相互作用占据主导作用;(4)在后续开发利用过程中,需进一步揭示影响地下水中H_(2)SiO_(3)分布与迁移的因素。【结论】研究结果可以为昭觉地区矿泉水产业的发展及城乡优质水源地的建设提供依据。This paper is the result of hydrogeological survey engineering.[Objective]In recent years,the drinking water health issues has been taken due to the improvement of living standards.Finding and developing high-quality groundwater with high-level minerals(e.g.H_(2)SiO_(3))has become the key step in improving human health.[Methods]The hydrogeological survey and groundwater pollution survey were carried out in the Zhaojue County,and the spatial distributions of H_(2)SiO_(3)-rich groundwater,hydrogeochemical components characteristics and factors were revealed.[Results]The main results including:(1)The groundwater with H_(2)SiO_(3)(≥25mg/L)was identified as the low salinity and alkaline water,which distributed in the six areas with the basement rocks of basalt.The H_(2)SiO_(3) concentration was generally 25.74-46.04 mg/L,pH level was generally 7.4-8.58,and TDS level is generally 49.4-333 mg/L;(2)The H_(2)SiO_(3)-rich groundwater of study area was characterized by the low mineralization while the main hydrochemical types of groundwater are HCO_(3)-Ca·Mg and HCO_(3)-Ca;(3)The H_(2)SiO_(3)-rich groundwater was influenced by the water-rock interactions,the distribution range and solubility of silicate minerals,the development of surrounding rock fissures,and water conservation and recharge conditions in the county,among which the water-rock interactions play a critical role;(4)It is necessary to further reveal the main factors affecting the distribution and migration of H_(2)SiO_(3) in groundwater in the subsequent development and utilization process.[Conclusions]The results can provide a basis for the development of mineral water industry and the construction of urban and rural high-quality water sources in Zhaojue area.

关 键 词：偏硅酸 地下水 玄武岩 生态环境 健康 开发利用 水文地质调查工程 四川省 

分 类 号：P632[天文地球—地质矿产勘探] P596[天文地球—地质学]