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矿床地质  2010 

青海察尔汗盐湖别勒滩区段固体钾盐液化前后物质组成对比及意义

Keywords: 地球化学,固体钾盐,液化前,液化后,别勒滩,青海

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Abstract:

察尔汗盐湖钾矿是中国最大的钾盐矿床,别勒滩位于察尔汗盐湖的最西端,目前正通过液化技术在别勒滩区段的固体钾盐层中提取钾资源。文章通过野外钻孔采集样品和室内系统的岩矿鉴定、X射线衍射、扫描电镜和化学成分分析,研究了含钾地层液化前、后的石盐和主要钾盐矿物的特征,对常量、微量元素进行了测定。得出的结论是:液化前和液化后主要钾盐矿物都是钾石盐、光卤石和杂卤石,其中杂卤石为最主要的钾盐矿物;液化前和液化后,富集程度高的微量元素为I、B和Li,可见别勒滩区段伴生元素I、B和Li具有开采潜力。通过计算得知此区段埋深22.42m以上液化前w(KCl)平均为2.15%,液化后w(KCl)平均为1.68%,计算预测溶出的KCl资源量约为5374万吨;埋深4.1m以上液化前w(KCl)平均为2.23%,液化后w(KCl)平均为1.71%,计算预测溶出的KCl资源量约为1087万吨,证明了液化法开采别勒滩地区固体钾盐经济可行。

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