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磁铁矿-磷灰石型铁矿是全球非常重要的铁矿床类型之一,其主要特征为:(1)含大量的块状磁铁矿、不定量的磷灰石,贫石英;(2)具有高U和稀土含量;(3)与钙碱性蚀变岩密切相关。长期以来,关于这类矿床是岩浆成因还是热液成因,一直存在较大的争议。传统观点认为,这类矿床的磁铁矿保存了原始的类玄武岩状结构,是磁铁矿从富铁熔体中结晶所导致的;然而,也有一些研究者根据铁矿体内广泛分
Magnetite-apatite type iron ore is one of the most important types of iron deposits in the world. Its main features are: (1) massive massive magnetite, non-quantitative apatite and lean quartz; ( 2) high U and rare earth content; (3) closely related to calc-alkaline alteration rocks. For a long time, there has been much controversy over whether these deposits are caused by magma or hydrothermal fluids. According to the traditional view, the magnetite in this type of deposit holds the original basalt-like structure, which is caused by the crystallization of magnetite from the iron-rich melt. However,