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