江西宜春钽铌矿矿床地质特征及富集规律

Geological Characteristics and Enrichment Regularity of Yichen Tantalum-Niobium Deposit

宜春钽铌矿地处于萍—广深大断裂南侧,武功山隆起区北东段,为一大型稀有金属矿床。矿体产于雅山花岗岩株的东缘顶部,钽、铌呈细粒浸染状嵌布于强、中钠长石化锂云母花岗岩带中及富锰铌钽铁矿、细晶石、含钽锡石等工业矿物内,花岗质岩浆源的分异演化从早到晚、从下而上朝富钠、富含挥发组分、富Ta、Nb等稀有元素及降温的方向逐渐演化,到晚期挥发组分和稀有元素达到最大限度的富集,从而形成钽铌矿床。

Yichun Tantalum-Niobium Deposit which is located in the south side of Pingxiang-Guangfeng deep fault and northeast section of Wugong Mountain uplifted area is a large-scale rare metal deposit.The ore-bodies are produced at the top of Yashan granite stock.Tantalum and niobium are finely disseminated in strongand medium sodium feldsparized lithium mica granite zones and industrial minerals such as manganese-rich niobium-tantalite,fine crystal,tantalum-bearing cassiterite.The divergent evolution of the granitic magma source evolves gradually from early to late and from bottom to top in the direction of sodium-rich,volatile componentrich,Ta-rich,Nb-rich and other rare elements and cooling,by the last stage volatile components and rare elements reach maximum enrichment,resulting in the formation of tantalum-niobium deposit.