福建南平花岗伟晶岩中的铌钽矿物学研究  

Study on the Nb and Ta-minerals from the Granitic Pegmatites in Nanping,Fujian Province

作　　者：王文瑛[1] 杨岳清[1] 陈成湖[2] 朱锦煌[2] 

机构地区：[1]中国地质科学院矿床地质研究所,北京100037 [2]福建省闽北地质大队,邵武354000

出　　处：《福建地质》1999年第3期113-134,共22页Geology of Fujian

摘　　要：铌钽矿物是福建南平花岗伟晶岩中最有工业利用价值的矿物,其种类较多,根据晶体结构和成分的差异,可分成6大类。即:铌铁矿钽铁矿类;重钽铁矿类;锡锰钽矿类;细晶石类;褐钇铌矿类;铌(钽)铁金红石类。铌铁矿钽铁矿还可进一步分成6个亚类。不同种类铌钽矿物产于不同类型伟晶岩或同一类型伟晶岩的不同矿物组合带。在详细讨论了各类铌钽矿物的产状、成分、物理性质及晶体结构等特征的基础上,探讨了它们的地球化学演化规律。The Nb and Ta minerals are the most valuable ones in Nanping granitic pegmatites.The mineral assemlage is more complex than that in any other areas of China.Six families of Nb and Ta minerals have been found,they are columbite tantalite,tapiolite,wodginite,microlite,ilmenorutile and fergusonite,the physical characters,chemical composition and distribution which will be discussed in this paper.Variety and amount of Nb,Ta minerals are different in each type pegmatites of the Nanping area.In the I type pegmatites,only a little columbite has been observed;in the Ⅱ,Ⅲ,Ⅳ type pegmatites,however,the kind and amounts of Nb and Ta minerals,especially of Ta rich minerals,increase in proper order.In various assemblege zone of the Ⅳ type pegmatites the distribution pattern of Nb and Ta minerals is similar to that of the Ⅰ Ⅳ type pegmatites.The amounts and kind of Nb,Ta minerals in the pegmatites or in the assemblage zone as well as the chemical composition of the pegmatites are closely related,most of all,to the increase in Nb,Ta,Li,Rb and Cs contents.The Ⅳ type pegmatites are an important Ta(Nb)deposits.

关 键 词：花岗伟晶岩 地球化学演化 铌矿物 钽矿物 

分 类 号：P588.131[天文地球—岩石学] P584[天文地球—地质学]