黔北务—正—道铝土矿中稀土元素赋存状态  

Study on the occurrence state of rare earth elements in bauxite deposits in the Wuchuan-Zheng′an-Daozhen area,northern Guizhou,China

作　　者：黄苑龄[1,2] 谷静 张杰[4] 黄智龙[3] HUANG Yuan-ling;GU Jing;ZHANG Jie;HUANG Zhi-long(Guizhou General Laboratory of Geology and Mineral Resources,Guiyang 550018,China;Guizhou Engineering Research Center for Comprehensive Utilization of Precious Metals Mineral Resources,Guiyang 550018,China;The State Key of Ore Deposit Geochemistry,Institute of Geochemistry,Chinese Academy of Sciences,Guiyang 550002,China;Mining College of Guizhou University,Guiyang 550002,China)

机构地区：[1]贵州省地质矿产中心实验室,贵州贵阳550018 [2]贵州省贵金属矿产资源综合利用工程技术研究中心,贵州贵阳550018 [3]中国科学院地球化学研究所矿床地球化学国家重点实验室,贵州贵阳550002 [4]贵州大学矿业学院,贵州贵阳550002

出　　处：《矿物学报》2021年第4期454-459,共6页Acta Mineralogica Sinica

基　　金：贵州省科技支撑项目(编号:黔科合支撑[2019]2859号);矿床地球化学国家重点实验室领域前沿项目(编号:SKLODG-2018-01)。

摘　　要：铝土矿中常伴生稀土等重要的战略性矿产资源,具有巨大潜在经济价值。本文通过化学物相分析,包括水溶相、离子相、胶态沉积相和矿物相4个相态进行逐级分离,以及碳酸盐类、有机质、铁矿物类、石英及硅酸盐类进行逐级分离等,研究了黔北务-正-道铝土矿中稀土元素的赋存状态。结果表明,该区铝土矿中稀土元素主要是以矿物相和离子相为主,水溶相稀土和胶态沉积相稀土极少,且矿物相稀土元素主要赋存于硅酸盐类矿物中。结合该区铝土矿矿物组成特征,认为粘土矿物是其中稀土元素主要的载体矿物,主要呈类质同象形式赋存于粘土矿物(如高岭石和绿泥石等)中,部分稀土元素呈分散状态被铝矿物(如一水硬铝石、软水铝石、三水铝石等)以及粘土矿物吸附。The bauxites commonly contain some kinds of associated important strategic mineral resources,such as rare earth elements,with the huge potential economic value.In this paper,chemical phase analysis has been undertaken for step by step separating four phases including water-soluble phase,ionic phase,colloidal sedimentary phase and mineral phase,as well as carbonates,organic matters,iron minerals,quartz and silicates in bauxite samples in order to study the occurrence state of rare earth elements in bauxite deposits in the Wuchuan-Zheng’an-Daozhen area,northern Guizhou.The results show that the rare earth elements in the bauxite deposits occurred mainly in the mineral phase and ionic phase,and rarely in the water-soluble phase and colloidal sedimentary phase.Rare earth elements in the mineral phase mainly occurred in silicate minerals.Combining with the mineral components characteristics of bauxites in this area,it is believed that clay minerals are main carriers of rare earth elements which occurred mainly in form of isomorphism in clay minerals(such as kaolinite and chlorite),and partly occurred in form of dispersed adsorption in aluminum minerals(such as diaspore,boehmite,gibbsite,etc.)and clay minerals.

关 键 词：铝土矿 稀土元素 赋存状态 务-正-道 

分 类 号：P579[天文地球—矿物学] P618.7[天文地球—地质学]