摘要
通过尕斯库勒盐湖3种卤水(盐田卤水、晶间卤水和湖表卤水)的水化学成分、化学类型、相图研究,初步揭示了该湖不同类型卤水的水化学特征。研究表明,3种卤水的Ca2+、Mg2+、Cl-、SO24-、HCO3-均比柴达木盆地盐湖平均值高,尤以盐田卤水为高,然而K+、Na+相对较低。微量离子均匀性:晶间卤水>湖表卤水>盐田卤水;主要离子均匀性:湖表卤水>晶间卤水>盐田卤水。卤水划分为硫酸镁亚型和氯化物型两类,没有发现硫酸钠亚型和碳酸盐型。其中,盐田卤水全部为氯化物型;晶间卤水既有硫酸镁亚型也有氯化物型,硫酸镁亚型占41.67%,氯化物型占58.33%;湖表卤水大部分为氯化物型。总体而言,卤水变质程度较深,其中盐田卤水变质最深,湖表卤水次之,晶间卤水变质程度较浅。盐田卤水、晶间卤水、湖表卤水在Na+,K+,Mg2+∥Cl-,SO24--H2O五元体系介稳相图中的位置差别较大,表明各类卤水在演化阶段上存在较大差别。
Based on the hydrochemical composition, hydrochemical type and metastable phase diagram this paper priliminary discussed the hydrochemical characteristics of three types brines （salt-bond brine, intercrystalline brine and superficial brine） in the Gas Hure Salt Lake. The average contents of Ca2＋ , Mg2＋,Cl-,SO4^2-,HCO3- existed in three types brines were all higher than those in Qaidam Basin＇s brines, while salt-bond brine higer than intercrystalline brine and superficial brine. However, K＋ and Na＋ were reversely. The trace elements＇ uniformity, intercrystalline brine 〉 superficial brine 〉 salt-bond brine; the major ions＇ uniformity, superficial brine 〉 intercrystalline brine 〉 salt-bond brine. The results showed that the brines belongs to chloride type and magnesium sulphate subtype, none of sodium sulphate subtype and carbonate type. Among all of the brines, salt-bond brine belong to chloride type; intercrystal- line brine belong to chloride type and magnesium sulphate subtype, magnesium sulphate subtype account for 41.7% and chloride type account for 58.33% ; most of the superficial brine belong to chloride type. In a word, brines underwent relatively deep metamorphy, salt-bond brine 〉 superficial brine 〉 intercrys- talline brine. The location of three types brines in quinary system metastable phase diagram of Na＋ , K＋ , Mg2＋//Cl- ,SO4^2- -H2O were quite differently. There existed a great difference at the evolution stages.
出处
《盐湖研究》
CSCD
2013年第1期14-23,37,共11页
Journal of Salt Lake Research
基金
核能开发科研技术研究项目"含铀盐湖铀富集条件和资源评价与开发技术研究"
关键词
尕斯库勒盐湖
卤水
水化学成分
水化学类型
介稳相图
Gas Hure salt lake
Brines
Hydrochemical composition
Hydrochemical type
Metastable phase diagram
作者简介
计传永（1984-），男，博士研究生，主要研究方向为水文地质矿产普查与勘探。E—mail：chuanyongye@163．com。
