浙西南元古宙硅铁矿的初步研究  

A PRELIMINARY STUDY ON FERROSILICIUM FROM THE PROTEROZOIC, SOUTHWESTERN ZHEJIANG PROVINCE

作　　者：胡雄健 

机构地区：[1]浙江省第七地质大队,丽水323000

出　　处：《矿物学报》1991年第3期285-288,F003,共5页Acta Mineralogica Sinica

摘　　要：浙江省西南部龙泉地区元古宙各类区域变质岩中普遍存在硅铁矿类罕见金属互化物。X射线粉晶分析和电子探针分析表明这类Si-Fe二元系矿物有二硅铁矿(FeSi_2)、硅铁矿(Fe_2Si_3)、等轴硅铁矿(FeSi)、喜峰矿(Fe_5Si_3)以及不知名的Fe_5Si_2,其中常含有Mn、Al、Ce、Eu、Ti等微量元素。如此多种类的产于前寒武系的天然硅铁矿物,在国内尚属首次发现。推测本区硅铁矿的成因来源与太古宙陨石事件有关。Ferrosilicium——a rare metallic mineral is widespread in the Proterozoic metamorphosed rocks of various types in Longquan, southwestern Zhejiang Province. X-ray powder and electron microprobe analyses indicate that the Fe-Si minerals from the ares studied include ferdicillite (FeSi_2), fersilicite (FeSi), (chivarious) ferrosilicium(Fe_2Si_3), xifengite(Fe_5Si)and unnamed Fe_5Si_2. They usually contain such trace elements as Mn, Al, Ce, Eu and Ti. So many kinds of natural Fe-Si minerals occurring in the Precambrian have been reported for the first time in China. Their formation can be explained by meteorite impact events during the Archaean.

关 键 词：硅铁矿 元古宙 喜峰矿 浙江 

分 类 号：P578.4[天文地球—矿物学]