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）,2026,45(3):143-153.

WANG F F, DING Y L, LI B,et al.Enrichment and source analysis of critical elements in No.6 coal seam of the Late Permian in Northern Guizhou[J].Journal of Henan Polytechnic University(Natural Science) ,2026,45(3):143-153.

黔北晚二叠世6号煤中关键金属元素的富集与来源分析

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 我国黔北地区煤炭资源丰富，伴生富集多种关键金属元素，选取黔北地区晚二叠世龙潭组6号煤层为研究对象，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（scanning electron microscopy energy-dispersive X-ray spectroscopy，SEM-EDX）、X射线荧光光谱（X-Ray fluorescence spectrometer，XRF）和电感耦合等离子体-质谱（inductively coupled plasma mass spectrometry，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等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

出版日期:2026/04/28

Enrichment and source analysis of critical elements in No.6 coal seam of the Late Permian in Northern Guizhou

Wang Fangfa1, Ding Yunlong1, Li Bi1, Tang Lifang1, Yang Yi1, Li Shangyuan1, Wang Xiaofang1, Zou Yinhong1, 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 The Northern Guizhou region in China is endowed with abundant coal resources and is rich in diverse critical elements. In this study， the Late Permian Longtan Formation No. 6 coal seam was selected as the research object to explore the enrichment characteristics and sources of critical elements in the coal seam.  Methods Industrial analysis，scanning electron microscopy with energy-dispersive X-ray spectroscopy（SEM-EDX），X-ray fluorescence spectrometry（XRF），and inductively coupled plasma- mass spectrometry （ICP-MS），were employed to analyze the elemental geochemistry and mineral composition of the samples to investigate the origin of critical elements in the coal.  Results The results show that Li，Th，and U in the Late Permian No.6 coal seam of Northern Guizhou are associated with clay minerals，whearas Tl may be hosted in pyrite. Ge and REY （rare earth elements and yttrium） are primarily associated with aluminosilicate minerals. The No.6 coal is enriched in Li， whereas the roof and floor， as well as the partings，are enriched in Nb and Ta. Additionally，the rare earth elements in the coal are of the light rare earth element （LREE）-enriched type.  Conclusions It is concluded that the Late Permian No.6 coal seam in Northern Guizhou is mainly enriched in Li，with the elements exhibiting a trend of gradual enrichment from west to east，primarily controlled by the terrigenous supply of weathered detritus from the Emeishan high-Ti basalt and the overlying acidic rocks， as well as the input of synsedimentary felsic volcanic ash.

Key words:critical metals;enrichment characteristics;material sources;late permian coal;Northern Guizhou