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中国的天然硅铁矿
Native Fersilicite of China
  
中文关键词:硅铁矿 二硅铁矿 自然硅
英文关键词:fersilicite  ferdisilicite  native silicon
基金项目:
胡雄健
浙江省第七地质大队
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中文摘要:
      硅铁矿属于罕见的Sl和Fe的互化物类矿物,目前在自然界已发现并命名的此类矿物 相的矿物有:古北矿(Fe3Si)、喜峰矿(Fe5Si3)、等轴硅铁矿(FeSi)、二硅铁矿
英文摘要:
       Fersilicite is a rare Si and Fe metallic mineral.Up till now, five sorts of mineral facies have been discovered, namely gubeiite (Fe3Si),xifengite ( Fe5Si3 ),fersilicite (FeSi),ferdisilicite (FeSi2) and suessite (a-Fe3Si),of which the first two minerals were found in the alluvial bed of Yanshan area, belonging to cosmic dust minerals. In 1980,Hong Wenxino first reported the discovery of ferdisilicite in Tibet and Gansu; afterwards, this mineral was successively found in such provinces (regions) as Jiangsu, Anhui,Xinjiang, Liaoning,Hebei and Zhejiang,and its host rocks are magmatic rocks, sedimen- tary rocks and metamorphic rocks, with mafic and ultramafic rocks being dominant. The host rocks were formed from Archean to Cenozoic, and the southern Zhejiang Proterozoic metamorphic area seems most widely distsibu- ted. Ferdisilicite of China contains Fe 41.1%一49.90o and Si 49.1%-55.9%, being deficient in Fe and rich in Si as compared with the theoretical values. In addition, ferdisilicite contains such minor elements as Mn, Al,Ce, Eu, whose contents are different in different areas. Besides fersilicite, the associa- ted minerals of ferdisilicite include sporadic native silicon (Si),and this has been confirmed by mineralogical and electron microprobe analyses and X-ray diffraction data. The areas producing primary native silicon so far known include Liaoning,Zhejiang and Fujian. Genetically, fersilicites axe derived either from mantle magma or meteo- rite falling.The fersilicites in the southern Zhejiang metamorphic area might have been related to the Archean meteorite falling event.
胡雄健,1995,中国的天然硅铁矿[J].岩石矿物学杂志,14(1):71~78.
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