地质学报Issue(6)：52-59,8.
西藏北羌塘盆地多格错仁地区盐泉水化学特征及其物质来源
Hydrochemical Characteristic and Origin for Salt Springs Water in Dogai Coring Area of North Qiangtang Basin,Tibet
摘要
Abstract
North Qiangtang Basin in Tibet is one main Jurassic marine area of potash exploration.There is a series of modern springs with a potassium anomaly in Dogai Coring area.Research on origin of salt springs has an important significance for potash exploration and scientific value.For this study forty salt springs water samples were taken from field.Chemical composition,δ34 S and 87 Sr/86 Sr of salt springs were determined in laboratory.Analysis results indicate that salt springs water have a high concentration of Na+ ,Ca2 + ,K+ ,Cl- ,and a poor concentration of Mg2 + ,SO2 -4 ,HCO-3 .Content of Cl- has more than 50% TDS and positive correlation with TDS.Moreover,Na+ ,Ca2 + ,K+ have a positive correlation with TDS.According to nNa+/nCl- and Br- · 103/Cl- of salt springs,springs water are from stratum lixiviation water.The δ34 S value of water samples from Yuanquanhe,Dongwenquan and south bank of Dogai Coring are consistent withδ34 S value of Jurassic seawater.It demonstrates that springs water might dissolve gypsum of stratum when springs water travelled under the ground.The figure of 1000/Sr-87 Sr/86 Sr illustrates that migration path and forming process of springs water from every sampling location are different from each other.The comparison for 87 Sr/86 Sr of salt springs and its background value shows that groundwater might lixiviate evaporite from 2 nd Member of Xiali Formation and 1 st Member of Suowa Formation.Xiali Formation and Suowa Formation are the most possible stratum of forming potash.关键词
西藏多格错仁地区/盐泉/硫同位素/锶同位素/钾盐Key words
Dogai Coring area,Tibet/salt springs/sulphur isotpe/strontium isotope/potash引用本文复制引用
牛新生,刘喜方,陈文西..西藏北羌塘盆地多格错仁地区盐泉水化学特征及其物质来源[J].地质学报,2014,(6):52-59,8.基金项目
本文为国家重点基础研究发展计划（973计划）项目（编号2011CB403003）和国土资源部盐湖资源与环境重点实验室开放基金项目（编号 ZS1114）资助的成果。 （）
