湘赣交界高坳背钨钼锂矿床云母矿物特征及其地质意义  

Mica Mineral Characteristics and Geological Significance of Gao’aobei Tungsten-molybdenum-lithium Deposit in Hunan-Jiangxi Junction

作　　者：徐欣宇 张笑天[1] 张勇[1,2] 潘家永[1] 徐喆[1,3] 张福神 周渝 戴浩橦 张思远 毛浩楠 杨毅 XU Xinyu;ZHANG Xiaotian;ZHANG Yong;PAN Jiayong;XU Zhe;ZHANG Fusheng;ZHOU Yu;DAI Haotong;ZHANG Siyuan;MAO Haonan;YANG Yi(State Key Laboratory of Nuclear Resources and Environment,East China University of Technology,Nanchang 330013,China;Jiangxi Provincial Key Laboratory of Genesis and Prospect for Strategic Minerals,East China University of Technology,Nanchang 330013,China;Jiangxi Institute of Non-ferrous Geology and Mineral Exploration and Development,Nanchang 330030,China;Institute of Basic Geological Survey,Jiangxi Geological Survey and Exploration Institute,Nanchang 330030,China)

机构地区：[1]东华理工大学核资源与环境国家重点实验室,江西南昌330013 [2]东华理工大学战略性矿产成矿理论与深部预测江西省重点实验室,江西南昌330013 [3]江西有色地质矿产勘查开发院,江西南昌330030 [4]江西省地质调查勘查院基础地质调查所,江西南昌330030

出　　处：《东华理工大学学报（自然科学版）》2024年第3期267-278,共12页Journal of East China University of Technology(Natural Science)

基　　金：国家自然科学基金项目(42062006);江西省“科技+地质”联合计划项目(2023KDG01002,2023KDG01003);江西省地质局科技研究项目(2022JXDZKJKY02);江西省地质局青年科学技术带头人培养计划项目(2022JXDZKJRC04);江西省地质调查勘查院基础地质调查所科研项目(〔2020〕06);东华理工大学研究生创新专项基金项目(YC2023 S553);核资源与环境国家重点实验室开放基金项目(2022NRE09,2022NRE31)。

摘　　要：南岭多金属成矿带中段的高坳背钨钼矿床共伴生云英岩型和花岗岩型锂矿资源,使其成为富锂云母的钨钼锂矿床,为揭示该矿床云母矿物的种类、生成顺序及其中锂的赋存状态,对该矿床各类花岗岩中的云母矿物开展了系统的岩相学观察和电子探针成分分析。结果表明,该矿床中云母矿物的生成顺序依次为铁叶云母、黑鳞云母、铁锂云母和锂云母,其中主要载锂矿物(富锂云母)为铁锂云母和锂云母,两者以富Al、K、Li,贫Mg、Ca、Ti为特征,分别属于燕山早、晚期热液白云母。其中燕山早期热液白云母的Li_(2)O与F含量呈正相关,而Na_(2)O+K_(2)O和AlⅥ与F含量均呈现负相关趋势,指示与多期次热液作用有关的钠长石化、云英岩化叠加和富含F的热液流体是控制锂成矿的关键因素。The Gao’aobei tungsten-molybdenum deposit in the central section of the Nanling polymetallic metallogenic belt is associated with spodumene-type and granite-type lithium resources,which makes it a rich mica tungsten-molybdenum-lithium deposit.In order to reveal the types,formation sequences and occurrence states of lithium of mica minerals in this deposit,a systematic petrographic observation and electron probe analysis of mica minerals in various granites of the deposit were carried out.The results show that the formation sequence of mica minerals in this deposit is iron foliaceous mica,black scale mica,iron leucite and leucite,which are characterized by rich in Al,K and Li,and poor in Mg,Ca and Ti,and belong to hydrothermal muscovite in early and late Yan-shannian.In the early Yanshannian,the content of Li_(2)O in hydrothermal muscovite is positively correlated with the content of F,but the content of Na_(2)O+K_(2)O and AlⅥare negatively correlated with the content of F,indicating that albitization,dolomitization superposition and F-rich hydrothermal fluid related to multi-stage hydrothermal processes are the key factors controlling lithium mineralization.

关 键 词：铁锂云母 云英岩化 高分异花岗岩 高坳背 

分 类 号：P618.67[天文地球—矿床学]