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.
出处
《煤炭学报》
EI
CAS
CSCD
北大核心
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
