卧龙湖煤矿岩浆侵入区煤中稀土元素的地球化学特征  

Geochemistry of rare earth elements(REEs) in coal from magmatic intrusion area from Wolonghu Coal Mine

作　　者：姜萌萌[1] 刘桂建[1] 吴斌[1] 郑刘根[1] 

机构地区：[1]中国科学技术大学地球和空间科学学院,中国科学院壳幔物质和环境重点实验室,安徽合肥230026

出　　处：《中国科学技术大学学报》2012年第1期10-16,25,共8页JUSTC

基　　金：国家自然科学基金(41173032,40873070);高校博士点基金(20093402110001);皖北煤电集团科技创新项目资助

摘　　要：以淮北卧龙湖煤矿包含岩浆岩、煤层的剖面为研究对象,通过对岩浆岩、煤岩混合带、高变质煤样品采集,结合逐级化学提取实验,采用等离子体质谱(ICP-MS)对原煤样、岩浆岩样、煤灰分以及煤和岩浆岩逐级提取实验中各种提取物的稀土元素进行了测试,系统、深入地研究了稀土元素的含量特征、分布模式以及赋存状态.研究结果表明,岩浆岩在侵入过程中与煤层间发生一定的物质交换作用,岩样与煤样中的稀土元素分布模式相差较大,逐级化学提取实验结果表明煤和岩浆岩中稀土元素都是以硅酸盐结合态占主导,但煤中稀土元素主要来源于陆源碎屑的供给.Magmatic rock samples and adjacent coal samples were collected from a vertical section in the Wolonghu Coal Mine, Huaibei. The chemical extraction experiments were carried out, and the abundances of rare earth elements fREEs） in samples and coal ashes were determined by inductively couple-plasma mass spectrometry （ICP-MS）. The occurrences of REEs were studied using sequential chemical extraction Experiment （SCEE） in different extraction liquids and conditions. The characterizations of the concentration, distribution patterns and the occurrence of REEs were analyzed. The results show that exchange of material between the magma and the coals occurred in the process of magmatic intrusion. Due to the superimposition of coal-forming microenvironment and magmatic intrusion, the distribution patterns of magma and coals are different. The result of SCEE shows that REEs are mainly distributed in sialic state, and that the source of REEs is terrigenous.

关 键 词：岩浆岩 煤 稀土元素 地球化学 

分 类 号：P594[天文地球—地球化学] P618[天文地球—地质学]