煤炭工程 ›› 2014, Vol. 46 ›› Issue (5): 119-122.doi: 10.11799/ce201405039

• 研究探讨 • 上一篇    下一篇

岩浆侵入对袁店二井煤矿72煤中稀土元素的影响

刘胜军   

  1. 安徽理工大学地球与环境学院
  • 收稿日期:2013-05-07 修回日期:2013-06-15 出版日期:2014-05-15 发布日期:2014-05-10
  • 通讯作者: 刘胜军 E-mail:lsj_ljz@126.com

Influence of Igneous Intrusion on the REE in Coals from No.72 coal-seam at Yuandian No.2 Coalmine,Huaibei

  • Received:2013-05-07 Revised:2013-06-15 Online:2014-05-15 Published:2014-05-10

摘要:

采用ICP-MS、XRF、XRD等分析测试手段,对淮北袁店二井煤矿72煤层7件煤样和3件岩浆岩样品中主量元素、稀土元素(REE)的含量和矿物成分进行了测定与分析。通过对样品中稀土元素的研究,探讨了72煤中稀土元素的丰度特征、分布模式及岩浆侵入对稀土元素分布的影响。结果表明:与中国煤中稀土元素的丰度相比,袁店二井煤矿72煤的稀土元素分布呈正常质量分数水平;72煤和天然焦中ΣREE平均值分别为88.87μg/g、94.58μg/g ,LREE/HREE平均值分别为8.58、6.80,具轻稀土富集、重稀土亏损的分布特征;72煤层受岩浆侵入影响变质为天然焦后,REE主要赋存的粘土矿物种类发生改变,轻稀土元素(LREE)的富集程度降低。

关键词: 煤, 岩浆侵入, 稀土元素, 淮北, 袁店二井煤矿

Abstract:

In order to investigate the characterizations of the concentration, distribution patterns of rare earth elements(REE) in coals and the distrbution features of REE when coal seams invaded by magma at Yuandian No.2 Coalmine, ICP-MS,XRF,XRD were used to analyze the content of the bulk elements,the REE and mineral composition in 7 coal samples and 3 magmatic rock samples from No.72 coal-seam. The results shows that the REE in coals from No.72 coal-seam at Yuandian No.2 Coalmine are distributed in normal mass fraction levels comparede to the abundance of REE in China coal. The average content of REE in coals and nature coke were 88.87μg/g and 94.58μg/g. While the average value of LRRR/HREE were 8.58 and 6.80, and the REE distribution pattern is characterized by a “V-shape” cure whit obviously Eu negative anomaly with enrich of LREE and HREE depletion.The main REE-bearing clay minerals were changed and the abundance of LREE in coals were depletion as a result of the igneous invasion.

Key words: coal, igneous intrusion, REE, Huaibei, Yuandian No.2 Coalmine