黔西北毕节地区富锂铝质岩的矿物学特征和锂的赋存状态研究  

Mineralogy and lithium enrichment states of lithium-rich aluminous rocks in the Bijie area,Northwest Guizhou

作　　者：张朝群 谭伟[2] 苏菲[1] 唐座 代启勇 何宏平[2] 贺怀宇[1] 朱日祥[1] ZHANG ChaoQun;TAN Wei;SU Fei;TANG Zuo;DAI QiYong;HE HongPing;HE HuaiYu;ZHU RiXiang(State Key Laboratory of Lithospheric and Environmental Coevolution,Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing 100029,China;CAS Key Laboratory of Mineralogy and Metallogeny,Guangzhou Institute of Geochemistry,Chinese Academy of Sciences,Guangzhou 510640,China;Regional Geological Survey Institute,Guizhou Bureau of Geology and Mineral Resources,Guiyang 550005,China)

机构地区：[1]中国科学院地质与地球物理研究所,岩石圈演化与环境演变全国重点实验室,北京100029 [2]中国科学院广州地球化学研究所矿物学与成矿学院重点实验室,广州510640 [3]贵州省地矿局区域地质调查研究院,贵阳550005

出　　处：《岩石学报》2024年第8期2321-2333,共13页Acta Petrologica Sinica

基　　金：中国科学院战略性先导科技专项A类项目(XDA0430103,贺怀宇);国家自然科学基金项目(42202265);广东省科技计划项目(2023B1212060048)联合资助。

摘　　要：随着新能源产业的迅速发展,锂矿已成为科技创新、经济发展的重要战略资源。我国的黏土型锂矿分布广、储量巨大,有望成为锂资源开发的重要方向。深入研究黏土型锂矿中锂的赋存状态,可为后续的提锂工艺提供理论基础。近期,黔西北毕节地区二叠系梁山组的铝质岩中发现了超常的锂富集,但锂的赋存状态尚不清楚,这限制了对该地区锂资源的综合开发利用。本研究利用矿物学和化学分析手段对该地区的富锂铝质岩进行了矿物学特征和锂赋存状态分析,结果表明:所选梁山组富锂铝质岩的Li_(2)O含量为0.62%;主要矿物成分为伊利石、锂绿泥石和一水硬铝石;锂赋存在伊利石和锂绿泥石等黏土矿物的结构中,吸附态锂的含量非常低。基于这些发现,本研究进一步采用分级沉淀法富集含锂的黏土矿物,富集后的样品黏土矿物含量得到了提升。以上研究结果为黏土型锂资源的高效提取提供了科学依据,对促进我国新能源产业的可持续发展具有重要意义。With the rapid development of the lithium(Li)battery industry,Li-bearing ores have become critical for technological innovation and economic development.Clay-type Li deposits which are widely distributed with enormous reserves have potential to be important in the development of the Li industry in our country.Investigating the enrichment states of Li in this type of deposits can provide the basis for subsequent lithium extraction.Recently,exceptional Li enrichments have been discovered in aluminum-rich rocks of the Permian Liangshan Formation in the Bijie area of Guizhou Province,China.However,the Li enrichment states of these rocks have been poorly studied,which hinders comprehensive utilization of this potential Li ore.In this study,we conducted mineralogical and chemical analyses on those Li-rich aluminous rocks,from which the following results are obtained:the Li_(2)O content in the studied Li-rich aluminum-rich rocks of the Liangshan Formation is about 0.62%;the main mineral components of these rocks include illite,cookeite and diaspore;the Li is primarily hosted within the clay mineral structures of illite and cookeite,with very low content of adsorbed Li.We also used sedimentation fractionation to enrich Li-bearing clay minerals,which successfully increased the contents of clay minerals.This study provides a scientific basis for efficient extraction of clay-type Li resources,which is of importance for promoting the sustainable development of new energy industry.

关 键 词：锂 黏土矿物 赋存状态 锂绿泥石 黔西北 

分 类 号：P588.22[天文地球—岩石学] P618.71[天文地球—地质学]