【摘要】：為研究幕阜山南緣地區(qū)偉晶巖的含礦性并指導(dǎo)幕阜山地區(qū)稀有金屬找礦工作,采用礦物學(xué)、XRF法分析了偉晶巖的礦物特征、主量元素及稀有元素。結(jié)果顯示,由北往南偉晶巖依次劃分為5種類型(Ⅰ~Ⅴ),其SiO_2(71.27%~76.93%)和Na2O(0.68%~7.99%)含量逐次升高,而K_2O含量(10.62%~0.74%)及K_2O/Na_2O值(13~0.09)、Nb/Ta值(4.7~0.2)和K/Rb值(139.02~25.42)則逐次降低。礦物學(xué)特征及地球化學(xué)分析表明,鉀長石偉晶巖(Ⅰ類)和斜長石偉晶巖(Ⅱ類)礦化以磷釔石和獨(dú)居石為主,斜長石-鈉長石偉晶巖(Ⅲ類)、鈉長石偉晶巖(Ⅳ類)和鈉長石-鋰輝石偉晶巖(Ⅴ類)礦化以綠柱石、鈮鉭鐵礦及鋰輝石為主,鈉長石化和鋰輝石化過程制約著稀有金屬成礦作用,是極好的找礦標(biāo)志。
[Abstract]:In order to study the ore-bearing property of pegmatite in the southern margin of Mufu Mountain and to guide the prospecting of rare metals in Mufu Mountain, the mineral characteristics, principal elements and rare elements of pegmatite were analyzed by mineralogy and XRF method. The results show that there are 5 types (鈪，

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