| 河南某铬铁矿床中铬尖晶石蚀变的地球化学研究 |
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| 引用本文： | 万欣.河南某铬铁矿床中铬尖晶石蚀变的地球化学研究[J].地球化学,1977(4):250-261,313. |
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| 作者姓名： | 万欣 |
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| 摘 要： | In the light of mineral assemblages, mineralogical generation and genesis of chromite ores, some geochemical aspects are investigated with respect to . relative abundance, the transportion and association mechanisms of Cr and related elements in the process of metasomatie alteration of primary chromian spinel during migmatization. The formation of Fe-chromite is a result of metasomatism from primary magnesian Al-chromite through ultrametamorphism. A knowledge of its chemical characteristics will not only be desirable to understanding the chemistry of the oreforming fluid during later metasomatism, but also provide valuable informatinns as to the transport of Cr and some other points concerning geochemical evolution. Critical influence of SiO2 and Al2O3 concentrations has been recognized upon the enrichment and dispersion of Cr in the course of ultrametamorphism.
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| 关 键 词： | 铬铁矿 铬尖晶石 蚀变 地球化学 |
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