吉林省桦甸油页岩中稀土元素和微量元素的研究

对桦甸油页岩及其灰渣的矿物成分、主量元素、稀土元素和微量元素含量进行测定。结果表明：油页岩中稀土元素含量低于北美页岩(NASC)中的平均含量，REE球粒陨石标准化的分布模式曲线表现为负斜率，(La/Yb)_N的平均值大于1，属于轻稀土富集型；REE北美页岩标准化的分布模式曲线较平缓，（La/Yb）_S的平均值接近于1，轻重稀土分馏不明显。与球粒陨石和北美页岩相比，Eu有较严重的正异常。油页岩中的微量元素与北美页岩和地壳的平均值相比较,Sb、Nb、Cs、Zn、Bi、W等元素具有较高的富集度。油页岩灰渣中稀土元素和微量元素富集度均高于油页岩。

Study on Rare Earth and Trace Elements in Oil Shale Samples, Huadian, Jilin Province

Major,rare earth and trace elements and mineral composition of the oil shale and the oil shale residue from the Huadian area,Jilin Province were determined by XRD,XFS and ICP-MS methods.The results show that the REE contents in the oil shale is poorer than the average of North Americia shales(NASC).The chondrite-normalized REE patterns show a negative gradient and the average(La/Yb)_N ration of the oil shale is highter than 1,reflecting higher LREE contents.The REE curve normalized by NASC is horizontal and the average(La/Yb)_S ration of the oil shale is close to 1.REE fractionation is not clear.Normalized by chondrites and NASC,remarkable positive Eu anomalies are found.The average contents of trace elements in the oil shale samples,when compared with those in NASC and the average of the earth's crust,are richer in Sb,Nb,Cs,Zn,Bi and W. The contents of both REE and trace elements in the oil shale residue are higher than those in oil shale.