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矿床地质  2003 

大吉山钨矿中钨铌锰矿与富钨铌锰矿的交生现象及其成因探讨

Keywords: 矿物学,富钨铌锰矿,钨铌锰矿,类质同像置换,大吉山,钨矿

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Abstract:

文章对大吉山钨锰矿矿石进行了电子探针分析,发现了一种主要元素为Nb、Ta、Fe、Mn、W的复杂氧化物矿物——钨铌锰矿。这种矿物与富钨铌锰矿交生,在成分上与后者呈渐变过渡。证实在自然界中黑钨矿与铌钽铁矿之间可能存在着广泛的W-Nb(Ta)类质同像置换现象。通过对其成分、形态和共生关系的研究,结合大吉山钨矿的形成期次,联系矿体与区域内两期花岗岩的内在关系,对大吉山钨矿的成因机制进行了探讨。

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