西山煤田马兰矿区8号煤及其夹矸的微量与稀土元素地球化学特征  

Geochemistry characteristics of trace elements & rare earth elements(REEs) of No.8 coal and parting in Malan Coal Mine,Xishan Coalfield

作　　者：孙蓓蕾[1] 曾凡桂[1] 李美芬[1] 齐福辉[1] 

机构地区：[1]太原理工大学地球科学与工程系煤科学与技术教育部及山西省重点实验室,山西太原030024

出　　处：《煤炭学报》2010年第1期110-116,共7页Journal of China Coal Society

基　　金：国家自然科学基金资助项目(40772097;40572094;40372073);山西省高等学校优秀青年学术带头人计划资助项目

摘　　要：运用X射线衍射分析(XRD)、电感耦合等离子体质谱(ICP-MS)及常规化学分析方法对马兰8号煤顶板、煤样、夹矸及黄铁矿结核中的矿物组成、微量与稀土元素及常量元素等地球化学特征进行了分析。结果表明,与美国大部分煤、中国大部分煤及华北石炭二叠纪煤对比:煤样中富集Li、Zn、Ga、Sr、Hf、U、Zr、W、Sn和REEs等元素;顶板样品中富集V、Cr、Zn、Rb、Cs、Sr、Hf、U、Zr、W、Tl、Pb、N i和REEs等元素;夹矸中富集Li、V、Cu、Ga、Sr、Ba、Hf、Th、U、Zr、Sn、W、Pb和REEs等元素;黄铁矿结核中富集Cr、Cu、As、Se、Cd、Sb、W、Tl和Pb等元素,其中有害微量元素V、Cr、N i、Cu、Zn、As、Se、Ba、Th、Cd、Sn、Sb、Tl和Pb主要分布在黄铁矿结核、顶板及夹矸中。稀土元素分布模式表明,煤层稀土元素主要来源于陆源碎屑,同时受海水的影响,不同分层受海水影响程度不同。稀土元素含量与灰分产率的相关性分析,以及与A l和Si等造岩元素含量的聚类分析表明,马兰8号煤层稀土元素主要赋存于黏土矿物之中。XRD, ICP - MS and conventional chemical analysis methods were applied to investigate geochemical characteristics of No. 8 coal, contents of trace elements and REEs in coal samples, coal roof, coal-bed gangue, parting and pyrite nodules compared the contents of REE in samples with the contents of most coal in North China, most coal in the United States and Carboniferons-Permian coal. The results indicate that Li, Zn, Ga, Sr, Hf, U, Zr, W, Sn and REEs con- centrate in coal samples. V,Cr,Zn,Rb,Cs,Sr,Hf, U,Zr,W,Tl,Pb,Ni and REEs concentrate in coal roof. Li,V,Cu, Ga, Sr, Ba, Hf, Th, U, Zr, Sn, W,Pb and REEs in coal-bed gangue, Cr, Cu, As, Se, Cd, Sb, W, Tl and Pb concentrate in pyrite nodules. Hazardous trace elements （ V, Cr, Ni, Cu, Zn, As, Se, Ba, Th, Cd, Sn, Sb, Tl and Pb） mainly enrich in coal roof, coal-bed gangue and pyrite nodules. Distribution patterns of REEs suggest that REEs are from terrigenous debris and influenced by seawater to some extent during the deposition of No. 8 coal seam. Correlation of REEs contents to ash yield and clustering analysis on contents of REEs and rock-forming elements show that REEs of No. 8 coalseam mainly exist in clay minerals.

关 键 词：煤 微量元素 稀土元素(REE) 地球化学 

分 类 号：P595[天文地球—地球化学]