ABSTRACT
The Late Permian, Linxi Formation was widely distributed in Linxi area, Inner Mongolia. The concentrations of trace elements, rare earth elements, and carbon and oxygen isotope were analyzed from the carbonate rocks of the Linxi Formation collected in the Guandi section. Influenced by terrigenous clastics and strong reduction environment of the Linxi Formation, the face of marine has been approved by the higher content of SiO2, Y, Zr, and Rb and the large range of variation, the total concentration of ∑REE+Y in the carbonate rocks ranged from 4.8 × 10-6 to 141.0 × 10-6, with the mean of 60.8 × 10-6, compared with MREE and HREE, LREE deficit was observed after PAAS normalization, with notable positive δEu anomaly (mean 1.91, maximum 5.54), positive δCe anomaly (mean 1.12, maximum 1.23) and higher ratio of Y/Ho (mean 51.7), the distribution pattern of REE and the diagram of carbon and oxygen of the carbonate rocks of the Linxi Formation was different from the pattern of normal marine and lacustrine.
