朱庄矿岩浆蚀变煤中微量元素特征研究
Characteristics of trace elements in magmatic altered coal of Zhuzhuang Mine
何明聪 1李锦 1肖乾隆 1吴勇霖 2易俊杰 2李伍1
作者信息
- 1. 中国矿业大学煤层气资源与成藏过程教育部重点实验室，江苏徐州 221008;中国矿业大学资源与地球科学学院，江苏徐州 221116
- 2. 中国矿业大学资源与地球科学学院，江苏徐州 221116
- 折叠
摘要
岩浆侵入煤层形成的岩-煤蚀变带是煤地质学的研究热点。为探究岩浆蚀变煤中微量元素的地球化学特征及其环境与健康影响，本文以淮北煤田朱庄矿8煤为研究对象，采用ICP-MS、XRD和SEM-EDS等方法，系统分析了样品的元素含量与矿物组成。结果表明：研究区煤中Ba、V、Cu、Rb、Li、Pb等元素呈轻度富集，而Sr、As、Zn等相对亏损；稀土元素整体富集。矿物组成以高岭石（48.9%）和伊利石（34.3%）为主，见有黄铁矿、方解石、绿泥石及铁氧化物。元素与矿物的异常富集主要受物源母岩、岩浆热液、后期构造及地下水活动共同控制。热液作用导致辉绿岩中Fe2?、Mg2?等组分迁移并发生蚀变，形成高岭石、伊利石及大量铁氧化物，反映煤层经历了中高温氧化性热液改造。本研究为认识岩浆侵入对煤质及元素迁移行为的影响提供了典型实例。Abstract
The rock-coal alteration zone formed by magma intrusion into coal seams has become a research focus in coal geology. To investigate the geochemical characteristics of trace elements in magmatic altered coal and their potential environmental and health impacts, this study selected the No. 8 coal seam from Zhuzhuang Mine in the Huaibei Coalfield as the research object. Methods including ICP-MS, XRD, and SEM-EDS were employed to systematically analyze the elemental content and mineral composition of the samples. The results indicate that elements such as Ba, V, Cu, Rb, Li, and Pb are slightly enriched in the studied coal, while Sr, As, and Zn are relatively depleted. Rare earth elements are overall enriched. MCharacteristics of trace elements in magmatic altered coal of Zhuzhuang Mineineralogically, tCharacteristics of trace elements in magmatic altered coal of Zhuzhuang Minehe coal is dominated by kaolinite (48.9%) and illite (34.3%), with the presence of pyrite, calcite, chlorite, and iron oxides. The anomalous enrichment of elements and minerals is jointly controlled by source rock properties, magmatic hydrothermal activity, post-coalification tectonic processes, and groundwater activity. Hydrothermal action led to the migration and alteration of Fe2? and Mg2? from diabase, forming kaolinite, illite, and abundant iron oxides, indicating that the coal seam underwent medium- to high-temperature oxidative hydrothermal alteration. This study provides a typical case for understanding the impact of magmatic intrusion on coal quality and element migration. 关键词
地球化学/矿物学/蚀变煤/微量元素/岩浆热液/朱庄矿。Key words
geochemistry/mineralogy/altered coal/trace elements/magmatic hydrothermal fluid/Zhuzhuang Mine.引用本文复制引用
何明聪,李锦,肖乾隆,吴勇霖,易俊杰,李伍.朱庄矿岩浆蚀变煤中微量元素特征研究[EB/OL].(2025-11-11)[2025-11-12].http://www.paper.edu.cn/releasepaper/content/202511-10.学科分类
地质学
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