王方发,丁允龙,李碧,等. 黔北晚二叠世6号煤中关键金属元素的富集与来源分析[J].河南理工大学学报(自然科学版)，doi:10.16186/j.cnki.1673-9787. 2024100015.

WANG F F, DING Y L, LI B, et al． Enrichment and source analysis of critical elements in No.6 coal seam from Late Permian in Northern Guizhou Province [J]. Journal of Henan Polytechnic University( Natural Science) ， doi: 10.16186/j.cnki.1673-9787. 2024100015 .

黔北晚二叠世6号煤中关键金属元素的富集与来源分析(网络首发)

王方发1，丁允龙1，李碧1，汤立方1，杨祎1，黎尚源1，王小芳1，邹银洪1，宋昱2

1.贵州省煤田地质局一四二队，贵州 贵阳 550000；2.中国矿业大学资源与地球科学学院 ，江苏 徐州 221116

摘要: 目的 随着工业发展和产业革新，关键金属矿产需求量与日俱增。煤系伴生金属是关键金属的潜在来源，也是当前矿产勘查的主要方向之一。我国黔北地区煤炭资源丰富，伴生富集多种关键金属元素，本研究选取黔北地区晚二叠世龙潭组6号煤层作为研究对象，旨在探讨该煤层中关键金属元素的富集特征及来源。方法 采用工业分析、全硫分析、扫描电镜能谱（SEM-EDX）、X射线荧光光谱（XRF）和电感耦合等离子体-质谱（ICP-MS）等测试方法对样品元素地球化学特征和矿物质组成进行研究，分析煤中关键金属元素的富集与成因。结果 结果表明：黔北晚二叠世6号煤中Li、Th、U元素的赋存与黏土矿物有关，Tl元素可能赋存在黄铁矿中；Ge和REY元素主要与铝硅酸盐矿物有关。6号煤中富集了Li元素，顶底板和夹矸中富集Nb和Ta元素，此外煤中稀土元素为轻稀土富集型。结论 黔北地区晚二叠世6号煤层主要富集Li，且元素具有自西向东逐渐富集的趋势，主要是受到康滇古陆的峨眉山高钛玄武岩和顶部中酸性岩的风化碎屑的陆源供给，以及同沉积长英质火山灰的输入影响。

关键词: 关键金属；富集特征；物质来源；晚二叠世煤；黔北地区

doi: 10.16186/j.cnki.1673-9787. 2024100015

基金项目: 国家自然科学基金资助项目（42102210）

收稿日期：2024-10-12

修回日期：2025-04-24

网络首发日期：2025-12-12

Enrichment and source analysis of critical elements in No.6 coal seam from Late Permian in Northern Guizhou Province (Online)

WANG Fangfa1，DING Yunlon1，LI Bi1，TANG Lifang1，YANG Yi1，LI Shangyuan1，WANG Xiaofang1，ZOU Yinhon1，SONG Yu2

1. 142 Team，Coal Mine Exploration Bureau of Guizhou Province，Guiyang 550000，Guizhou，China；2.School of Resources and Geosciences，China University of Mining & Technology，Xuzhou 221116，Jiangsu，China

Abstract: Objectives With the advancement of industrial development and industrial innovation, the demand for critical elements minerals is escalating. Coal-associated metals represent a potential source of critical elements and constitute one of the main directions in mineral exploration. The region around the Northern Guizhou Province in China is endowed with abundant coal resources and is rich in diverse critical elements. This research selected the Late Permian Longtan Formation No. 6 coal seam in the Northern Guizhou Province as the research object, with the aim of exploring the enrichment characteristics and sources of critical elements in the coal seam. Methods By employing industrial analysis, scanning electron microscope energy dispersive X-ray spectroscopy (SEM-EDX), X-ray fluorescence spectrometry (XRF), and inductively coupled plasma-mass spectrometry (ICP-MS), the study analyzed the elemental geochemistry and mineral composition of the samples to investigate the origin of critical elements in the coal. Results The results indicated that the Li, Th, and U elements in the Late Permian No. 6 coal seam of Qianbei are associated with clay minerals, while Tl may be present in pyrite. Ge and REY elements are primarily associated with aluminosilicate minerals. The No. 6 coal is enriched with lithium (Li), while the top and bottom plates, as well as the gangue, are enriched with niobium (Nb) and tantalum (Ta). Additionally, the rare earth elements present in the coal are of the light rare earth enriched type. Conclusions The conclusion drawn is that the Late Permian No. 6 coal seam in the Northern Guizhou  Province is mainly enriched in Li, and the elements exhibit a trend of gradual enrichment from west to east, mainly influenced by the weathering and fragmentation of the Emeishan high-titanite basalt of the Kangzhou Craton and the top acidic rocks, as well as the input of felsic volcanic ash.

Key words: critical elements；enrichment characteristics；material sources；late permian coal；the Northern Guizhou Province