内蒙古哈达贺休盐湖卤水水化学特征及成因

Hydrochemical Characteristics and Origin of Brine in Hadahexiu Salt Lake， Inner Mongolia

中文关键词:  哈达贺休盐湖  卤水  水化学特征  成因

英文关键词:Hadahexiu  Salt lake brine  Hydrochemical characteristics  Origin

中文摘要:

      内蒙古哈达贺休盐湖是由黑河尾闾湖演化形成的现代干盐湖。地质勘探发现其地下蕴藏有第四系上更新统砂砾层孔隙卤水，目前对其水化学特征及成因没有系统的研究报道。本文作者采集了哈达贺休盐湖 24件卤水样品，并分析其常量和微量离子含量、矿化度( TDS)和 pH值。结果显示，盐湖卤水水化学类型为硫酸钠亚型， pH值在 6.72～ 7.77之间，属弱碱性卤水； TDS在 59.71～172.02 g/L之间，平均值 100.45 g/L，属中低矿化度；卤水常量离子中 K+含量为 0.66～3.16 g/L，平均 1.60 g/L(接近和超过了综合利用的标准)，K/TDS比值也高于马海、黑北凹地等深层卤水，并落在察尔汗和罗布泊晶间卤水数量级范围内。表明研究区卤水具有成钾而低矿化度的特征；微量离子中 B2O3和 Li+含量分别为 40.09～278.21 mg/L和 1.14～5.17 mg/L。K-Li-B三角当量图显示，盐湖卤水具有富 K、B特征，具有综合开采钾和硼的潜在经济价值；卤水离子钠氯系数(0.79～6.15)和溴氯系数( 0.11～1.81)揭示卤水主要为岩盐溶滤成因。

英文摘要:

      Inner Mongolia Hadahexiu Salt Lake is a modern dry salt lake formed by the evolution of the HeiheRiver. It has been found by geological exploration that there is a Quaternary Upper Pleistocene gravelporebrine in the underground. There is no systematic research on its water chemistry and genesis. The authors col.lected 24 brine samples from Hadaheshu Salt Lake and analyzed their constant and trace ion content，salinity(TDS)and pH. The results show that the chemical type of salt lake brine is sodium sulfate subtype，pH value is 6.72～7.77，which is a weakly alkaline brine. TDS is 59.71～172.02 g/L，the average value is 100.45 g/L， which is medium and low salinity. The K+ content in the brine constant ion is 0.66～3.16 g/L，with an average of