Geochemical Characteristics of REE and Its Implications to X03 Super-Large Lithium Pegmatite Vein, Jiajika, Sichuan

The super-large new No.3 (X03) lithium ore vein is a lithium mineralized pegmatite vein of great value. This paper summarizes the rare earth element (REE) geochemical characteristics by studying the typical drill ZK1101. Results show that the X03 lithium-mineralized pegmatite vein has a very low total amount of rare earth elements (∑REE =0.180×10^-6~8.613×10^-6, average=2.543×10^-6, n=24), the distribution curve is right-inclined type, which means the samples are enriched in LREE and depleted in HREE, and the pegmatite shows negative anomalies of Eu. The host rocks have general REE content (∑REE=160.134×10^-6~265.881×10^-6, average=230.718×10^-6, n=20). The rare earth distribution curve is generally inclined to the right, showing the enrichment of LREE and negative anomalies of Eu. The distribution of Eu in rare earth elements is specific, and Eu has a strong positive anomaly at the edge of the pegmatite vein. ∑REE is negatively correlated with Li, δCe and Li show a slight positive correlation, revealing the inverse correlation between rare earth element and lithium. It also means that the low content of REE is an important prospecting sign for rare metals mineralized pegmatites.