The increasing demand for rare earth elements has prompted the study of potential sources of rare earth elements,and the high content of rare earth elements in highly fractionated rhyolites is considered as one of the potential sources of rare earth elements.A detailed study of the petrology and mineral chemicaistry in peralkaline felsic volcanic rocks from Sanshui basin,which formed via prolonged fractional crystallization,aims to investigate the occurrence state and enrichment mechanism of rare earth elements in highly fractionated rhyolites.The results show that the rare earth elements in peralkaline felsic volcanic rocks are enriched by 3.8-11.3 times compared to that in the upper crust,and the rare earth elements are mainly presented in four types of rare earth bearing minerals:rare earth oxyfluoride minerals,rare earth fluor-carbonate minerals,rare earth phosphate minerals and rare earth oxide minerals,in which the rare earth oxyfluoride minerals and rare earth phosphate minerals are the mainly rare earth bearing minerals.Combined with rare earth elements content in peralkaline felsic volcanic rocks which has exceeded the industrial grade,it is thought that the peralkaline felsic volcanic rocks in the Shiling region of Sanshui Basin have rare earth element mineralization potential.
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