地质学报2024，Vol.98Issue(8)：2424-2438,15.DOI:10.19762/j.cnki.dizhixuebao.2024094
原位微区分析华北典型富锂煤中关键金属赋存规律
In-situ microanalysis of critical metal occurrences in high-lithium coals of North China
摘要
Abstract
Coal,a significant organic sedimentary rock,possesses the potential to serve as a source of various critical metals. Lithium mineralization in the coals of North China has been extensively documented. This study employed a suite of in-situ analytical techniques,including LA-ICP-MS,SEM-EDX,Micro-Raman,and Micro-FTIR,to investigate the host phases of Li and other enriched critical metals in high-Li coals from North China. This study offers a new perspective on the understanding of the enrichment mechanisms and exploration potential of critical metals within coal deposits. The results indicate that lithium is predominately hosted within kaolinite,exhibiting three distinct assemblages:Li-Ga,Li-Zr-Nb-Hf-Ta,and Li-Y-Sr. Kaolinite with Li-Ga and Li-Zr-Nb-Hf-Ta enrichments originated from detrital input and ash supply during peat formation. The Li-Y-Sr enrichments in kaolinite are a result of epigentic fluid activity in the coal. Telinite presents enrichment with zirconium (Zr),hafnium (Hf),and thorium (Th). Additionally,sodium-bearing clay veins display elevated concentrations of gallium (Ga),barium (Ba),and thallium (Tl),while apatite veins exhibit enrichments in Ba,strontium (Sr),and yttrium (Y). These critical metal enrichments in mineral veins are attributed to fluid activity during coalification.关键词
关键金属/原位分析/富锂煤/赋存状态Key words
critical metals/in-situ analysis/Li-enriched coal/mode of occurrence引用本文复制引用
孙蓓蕾,王瑶,李宝庆,刘超,郭沾明,张星星..原位微区分析华北典型富锂煤中关键金属赋存规律[J].地质学报,2024,98(8):2424-2438,15.基金项目
本文为国家重点研发计划项目(编号2021YFC2902002)、国家自然科学基金项目(编号42372203)和山西省科技创新人才团队专项项目(编号202304051001028)联合资助的成果. （编号2021YFC2902002）
