State of rare earth elements in the rare earth deposits of Northwest Guizhou, China

• 作者: Peinan He Mingyou He Hai Zhang
• 来源期刊: 地球化学学报(英文）
• 关键词: Kaolinite Clay rocks Rare earth deposits Element existence state Information extraction Northwest Guizhou Province
• 年，卷（期）: 2018,（6）
• 页码范围: 867-874
• 页数: 7页
• 语种: 英文
• DOI: 10.1007/s11631-018-0278-3

摘要

We studied the states of rare earth elements in ore of the Xianglushan rare earth deposit. Rare earth ore samples were tested and examined by scanning electron microscope, electron probe, and chemical leaching. No independent rare earth minerals were detected by scanning electron microscope. Elements detected by the electronic probe for the in situ micro-zone of the sample included: O, Al, Si, Ca, Mg, Fe, Ti, K, Na, S, Cl, C, Cu, Cr, V, and Pt. Rare earth elements were not detected by electron probe. (NH4)2SO4, (NH4)Cl, NaCl, and H2SO4 were used as reagents in chemical leaching experiments that easily leached out rare earth elements under the action of 10% reagent, indicating that the rare earth elements in ore are mainly in the ionic state rather than present as rare earth minerals.