REE Geochemistry and Mineralization Characteristics of the Zudong and Guanxi Granites,Jiangxi Province

Abstract The Zudong and Guanxi granites are original rocks of the ion adsorption-type HREE and LREE deposits in weathering crust of granites. The ∑REE ¹ ∑REE=REE+Y.
value and LREE ² LREE=∑(La-Eu) and HREE=∑(Gd-Lu)+Y.
/ HREE ratio of the Zudong granite are 264 ppm and 0.81-0.24 respectively, and the average Y/∑REE ratio is 35.8-54.5%. This is mainly due to magmatic crystallization and evolution and deuteric metasomatism (albitization, muscovitization and fluorite-doveritization). These alterations resulted in endogenic mineralizations of yttrium-group REE fluorine carbonates, silicates and arsenates. The Guanxi granite is characterized by LREE enrichment (the average LREE/HREE ratio is 2.43).