贵州省仁怀市吴家寨地区晚二叠纪煤系地层稀土地球化学特征浅析  

Geochemical characteristics of rare earth geochemistry in Late Permian coal measures strata in Wu Jia area,Guizhou,Renhuai

作　　者：叶春 刘志臣 李隆富 YE Chun LIU Zhi-chen LI Long-fu(Guizhou Bureau of land and mineral resources reserve, Guizhou Guiyang 550001, China The 102 Geological Team, Guizhou Bureau of Exploration and Development of Geology and Mineral Resources, Guizhou Zunyi 563003, China)

机构地区：[1]贵州省土地矿产资源储备局,贵州贵阳550001 [2]贵州省地矿局一O二地质大队,贵州遵义563003

出　　处：《贵阳学院学报（自然科学版）》2017年第3期102-105,共4页Journal of Guiyang University：Natural Sciences

基　　金：贵州省地质矿产勘查开发局地质科学研究项目(编号:黔地矿科合[2014]04号)

摘　　要：晚二叠世为贵州重要的成煤期,研究区煤炭资源丰富,是贵州煤炭重要产区之一。本次以研究区龙潭组为研究对象,针对含煤层位进行取样,对样品做稀土地球化学分析。研究表明,煤中∑REE总量变化为(158.82~186.64),普遍小于200。LREE/HREE比值变化为(8.65~30.07),明显大于1,(La/Yb)N比值(4.64~12.93),Ce具有微弱的负异常,Eu存在明显的负异常,表明在成煤沼泽环境中,海水的影响并没有造成Ce的严重亏损,成煤环境主要受陆相控制的特点;煤层煤样中的稀土元素配分模式与玄武岩的稀土元素的配分模式具有相似性,玄武岩是煤样稀土元素的主要来源。In Late Permian, Guizhou important coal forming period, coal resources in the study area is rich, is one of the important areas of Guizhou coal. The study area in Longtan group as the research object, geochemical analysis of rare earth samples was carried out for eaol seams. In this study,the total quantity of sigma REE in coal is（ 158.82 - 186.64）, which is generrally less than 200. The change of LREE/HREE ratio was （ 8.65 - 30.07 ）, obviously greater than I, and （La/Yb） N ratio was 4.64 to 12.93. Ce has a weak negative anomaly, Eu has obvious negative anomaly, showed that in the peat swamp environment, serious loss of water and did not cause Ce, coal forming environment is mainly affected by the characteristics of continental control;rare earth elements in the coal seam distribution pattern and basalt distribution pattern is similar basalt is the main source of rare earth elements of coal.

关 键 词：贵州省 二叠系 煤系 稀土元素 

分 类 号：P595[天文地球—地球化学] P611[天文地球—地质学]