郭柳;张辉;吕正航;唐勇;安燚;陈剑争;

• 1:中国科学院地球化学研究所地球内部物质与高温高压院重点实验室
• 2:中国科学院大学

摘要(Abstract)：

选取可可托海3号脉石英-锂辉石带、卡鲁安806号脉、库卡拉盖650脉，开展石英、锂辉石中流体包裹体显微测温以及石英中捕获的单个流体包裹体组成的LA-ICP-MS原位分析。结果表明，锂矿化伟晶岩晚期出溶流体相为H_2O-NaCl-CO_2体系，石英中流体包裹体均一温度为233～407℃，盐度为5.77%～20.15%;w(Li)为1527×10^(-6)～17767×10(-6)～17767×10^(-6)、w(Cs)为32×10(-6)、w(Cs)为32×10^(-6)～4563×10(-6)～4563×10^(-6)、w(Rb)为10×10(-6)、w(Rb)为10×10^(-6)～100×10(-6)～100×10^(-6)。Li与Cs、Rb与Cs之间存在正相关系，并且Li/Rb与Li、Cs/Rb与Cs显示正相关关系，表明Li、Rb、Cs强烈分配进入流体相。流体包裹体中K/Na<0.4，指示锂矿化伟晶岩晚期分异出的流体显示富钠性质。26个流体包裹体LA-ICP-MS分析结果显示锂矿化伟晶岩晚期流体相中含有0.33%～3.82%Li_2O(w(Li_2O)平均值为1.10%），考虑到Li、Cs、Rb在流体/熔体间的分配系数>1，由此提出伟晶岩型锂床具有岩浆热液成因的可能性。

关键词(KeyWords)： 流体组成;流体包裹体;LA-ICP-MS;锂矿化伟晶岩;新疆阿尔泰

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目（编号：91962222; 41873030）;; 中国科学院战略性先导科技专项（B类）（编号：XDB18020103）

作者(Authors): 郭柳;张辉;吕正航;唐勇;安燚;陈剑争;

DOI: 10.16461/j.cnki.1000-4734.2022.42.077

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