补水背景下大盐滩矿区潜卤水水化学特征  

The Hydrochemical Characteristics of Unconfined Brine in Kunty Mine with the Water Supplement

作　　者：都永生[1,2,3] 高东林[1,3] 张岩[1,2,3] 任倩慧[1,2,3] 李斌凯[1,3] 袁小龙[1,3,4] 刘秀婷[1,2,3] 

机构地区：[1]中国科学院青海盐湖研究所中国科学院盐湖资源综合高效利用重点实验室,青海西宁810008 [2]中国科学院大学,北京100049 [3]青海省盐湖地质与环境重点实验室,青海西宁810008 [4]河海大学水利水电学院,江苏南京210000

出　　处：《盐湖研究》2017年第2期40-46,共7页Journal of Salt Lake Research

摘　　要：为探究补水背景下大盐滩矿区潜卤水水化学组分的变化规律,采用水化学分析测试方法,对2015年5月和7月分别就矿区33口长期观测孔内潜卤水中的Ca^(2+)、K^+、Na^+、Mg^(2+)、HCO_3^-、SO_4^(2-)、Cl^-的含量进行测定,分析矿区潜卤水中Ca^(2+)、K^+、Na^+、Mg^(2+)、SO_4^(2-)、Cl^-的变化趋势,并查明其分布特征。结果表明:补水背景下,大盐滩矿区潜水含水层中的潜卤水水化学组分在时间和空间上存在着明显的变化。在时间上,5~7月时间段内,K^+,Na^+、Mg^(2+)、SO_4^(2-)的浓度升高,且Na^+浓度变化幅度较大;Ca^(2+)、Cl^-浓度降低。在空间上,矿区中部和东南部,晶间潜卤水中的K^+、Mg^(2+)、SO_4^(2-)浓度较高;矿区北部晶间潜卤水中的K^+、Mg^(2+)、SO_4^(2-)的浓度则相对较低。补水可以适当地增大开采区域潜卤水中K^+的浓度,提升卤水的质量。Kunty salt lake is a secondary fault basin in northwest Qaidam basin. It contains very abundant brine resources. In order to explore the changing regularities of unconfined brine chemical components in Kunty mine with water supplement, in the present work, the changing regularities and distribution charac- teristics of Ca^2＋ , K^＋ , Na^＋ , Mg^2＋ , SO42and Clwere ascertained with hydro - chemical analysis meth- od. In May and July 2015, we collected brine samples in 33 observation wells and analyzed the concen- tration of Ca^2＋ , K^＋ , Na^＋ , Mg^2＋ , HCO3-, SO4^2- and Clin unconfined brine of Kunty mine. Based on the testing data, we can draw out following conclusions ： With the continual water supplement, the hydro- chemical constituents in unconfined brine of Kunty mine showed a significant change in time and space. The concentrations of K^＋ , Na^＋ , Mg^2＋ and SO4^2- increased while the concentrations of Ca^2＋ and CI de- clined in May and July 2015. Na^＋ presented higher amplitude of concentration variation in time. The concentrations of K^＋ , Mg^2＋ and SO4^21 in unconfined brine were much higher in the middle and southeast while much lower in the north of the mine. The water supplement could suitably enlarge the concentration of K^＋ and promote the quality of the unconfined brine in the Kunty mine.

关 键 词：大盐滩 潜卤水 水化学特征 

分 类 号：P641.5[天文地球—地质矿产勘探]