中文摘要：

野外地质调查与研究发现伦坡拉盆地有大规模的油页岩出露,通过伦坡拉盆地丁青湖组油页岩的稀土元素地球化学分析,结果表明油页岩中稀土元素总量较高,LREE/HREE及（La/Yb）N比值等显示了轻稀土元素与重稀土元素分异明显,REE分布模式为明显的轻稀土元素富集、重稀土元素亏损,轻稀土元素段呈显著的右倾,重稀土元素段呈平坦状,Eu负异常很明显。Ceanom值反映了水体介质的还原性,表明油页岩形成于还原的古湖泊环境;δEu值与古气候特征分析表明,油页岩形成于湿润的古气候环境。∑REE质量分数与Al2O3、SiO2及TiO2质量分数呈正相关关系,与CaO质量分数呈负相关关系,结合微量元素的聚类分析,表明油页岩稀土元素主要来源于陆源碎屑,而非水体自身沉积。

英文摘要：

There are large-scale outcrops of oil shale in Dingqinghu Formation,Lunpola Basin according to field geological surveys and research.In this study,we analyzed the REE concentrations of Lunpola oil shale,the results indicate that total rare earth elements are higher,LREE/HREE and LaN/YbNshow that differentiations between LREE and HREE are obvious;REE distribution patterns of apparent LREE is abundant,while HREE is defective,show that LREE is obviously rightward heeling,while HREE is even with significant negative Eu anomaly.According to characteristics of Ceanom,the Lunpola oil shale was formed in anoxic paleolake environment,based onδEu negative anomaly and its correlation with the paleoclimate,indicating that the oil shale formation in the study area was humid paleoclimate.The correlation ofΣREE with Al2O3,SiO2 and TiO2is positive,which is obvious negative correlated with CaO,indicating that numerous terrigenous sediments was brought into the deposition environment,in addition with cluster analysis of trace elements and their REE sample,we conclude that the REE of oil shale in the study area mainly from territorial clastic deposits,rather than the water itself deposition.