豫西含铝岩系锂、铌钽金属分布特征及富集机制OA

The western Henan hosted large-scale diasporic karst bauxite deposits in the Late Carboniferous formations,characterized by abundant rare,dispersed,and rare earth elements,along with high abundances of lithium and niobium-tantalum.Focusing on six bauxite deposits in western Henan,this paper,based on their robust geological data,examines the correlations of lithium and niobium-tantalum with the primary chemical components of ores.Meanwhile,using X-ray diffraction(XRD)and scanning electron microscopy(SEM)methods,it investigated the distribution and enrichment mechanisms of lithium and niobium-tantalum in aluminum-bearing rock series.The results show that lithium and niobium-tantalum exhibited positive correlations with the primary chemical components in bauxites and roof clay rocks,with significantly different correlations observed in the floor ferrous clay rocks.This implies the complexity of prove-nances of the aluminum-bearing rock formations.In addition,in the roof clay rocks,bauxites,and floor ferrous clay rocks,the content of lithium was positively correlated with that of niobium-tantalum.This demonstrates that they share substantially identical enrichment mechanisms during deposition and the same or overlapping ore-forming provenances.This study demonstrates the possibility of associat-ed lithium and niobium-tantalum in the study area evolving into industrial deposits,filling the gap in research on their enrichment mecha-nisms in the aluminum-bearing rock series,western Henan.The study area holds significant potential for lithium and niobium-tantalum resources,which will bring enormous economic benefits.Therefore,further mineral exploration should be carried out here.