REE Characteristics and Its Geological Significance of the Permo Carboniferous in Bohaiwan Basin

Key words: 
• REE /
• Carboniferous and Permian /
• palaeoenvironment /
• material source /
• Bohaiwan Basin

Abstract: An ICPMS method is used to determine the contents of rare earth elements of Carboniferous and Permian sedimentary rocks in Bohaiwan Basin. The average REE content of every sample is 290.39 μg/g, and it is obvious higher than the North American shale sample. The δEu is 0.420.83, and the average is 0.67,and the samples are lack of Eu. Most samples content nomal Ce, and δCe is 0.511.22,and the average is 0.97.The rare earth element patterns indicate that the LREE is rich and the HREE is lack,and the HREE patterns are flat. The lack of Ce indicates the ancient water of the upper Carboniferous is oxidable. According to the values of δEu and the REE content and its variation,the material source of Carboniferous and Permian in Bohaiwan Basin was from the Yinshan ancient continent and its province is granite.