HUANG Yuan-ling1,2, GU Jing3, ZHANG Jie4, HUANG Zhi-long3*
(1. Guizhou General Laboratory of Geology and Mineral Resources, Guiyang 550018, China;
2. Guizhou Engineering Research Center for Comprehensive Utilization of Precious Metals Mineral Resources, Guiyang 550018, China;
3. The State Key of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China;
4. Mining College of Guizhou University, Guiyang 550002, China)
Abstract: The bauxites commonly contain some kinds of associated important strategic mineral resources, such as rare earth elements, with the huge potential economic value. In this paper, chemical phase analysis has been undertaken for step by step separating four phases including water-soluble phase, ionic phase, colloidal sedimentary phase and mineral phase, as well as carbonates, organic matters, iron minerals, quartz and silicates in bauxite samples in order to study the occurrence state of rare earth elements in bauxite deposits in the Wuchuan－Zheng'an－ Daozhen area, northern Guizhou. The results show that the rare earth elements in the bauxite deposits occurred mainly in the mineral phase and ionic phase, and rarely in the water-soluble phase and colloidal sedimentary phase. Rare earth elements in the mineral phase mainly occurred in silicate minerals. Combining with the mineral components characteristics of bauxites in this area, it is believed that clay minerals are main carriers of rare earth elements which occurred mainly in form of isomorphism in clay minerals (such as kaolinite and chlorite), and partly occurred in form of dispersed adsorption in aluminum minerals (such as diaspore, boehmite, gibbsite, etc.) and clay minerals.
Keywords: Bauxite; rare earth elements; occurrence state; the Wuchuan-Zheng'an-Daozhen area
ACTA MINERALOGICA SINICA Vol. 41, No.4/5, 2021, page 454-459
