Tin-tantalum-niobium mineralization in the Penouta deposit (NW Spain): Textural features and mineral chemistry to unravel the genesis and evolution of cassiterite and columbite group minerals in a peraluminous system

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• 作者：Teresa Llorens Gonzá ; lez^a ; ^b ; ^{tllorens@strategicminerals.com} ; Francisco Garcí ; a Polonio^a ; ^b ; Francisco Javier Ló ; pez Moro^a ; ^b ; Agustina Ferná ; ndez Ferná ; ndez^b ; José ; Luis Sanz Contreras^c ; Marí ; a Candelas Moro Benito^b
• 关键词：The Penouta rare-element granite ; Sn-Ta-Nb granites ; Columbite group minerals ; Fractional crystallization ; Fluorine influence
• 刊名：Ore Geology Reviews
• 出版年：2017
• 出版时间：March 2017
• 年：2017
• 卷：81
• 期：part_P1
• 页码：79-95
• 全文大小：3485 K
• 卷排序：81

文摘

Sn, Ta and Nb mineralization occurs finely disseminated throughout the leucogranite. Evolutionary trends reflect Ta- and Mn-enrichment towards eastern albite facies. Ta-Nb and Mn-Fe in the melt depend on competition among Fe-Mn-bearing minerals. Fluorine and fractionation of white mica could have favored Ta-enrichment of residual melt.