【作者】 李九玲； 张桂兰； 苏良赫；

【Author】 Li Jiuling and Zhang Guilan (Institute of Mineral Deposits,Chinese Academy of Geological Sciences) Su Lianghe (Beijing Graduate School,Wuhan College of Geology)

【机构】 矿床地质研究所； 武汉地质学院北京研究生部；

【摘要】 <正>自五十年代来,国外已发现有"矿流"产出的磁铁矿矿床,如在智利北部普纳高原拉科山地见有储量上十亿t的铁矿。铁矿的产状和矿石的构造与玄武岩流无异,其成因只能用与岩浆相似的矿浆成因来解释。根据野外地质观察,我国有些地区的铁矿床例如宁芜地区更多还原

【Abstract】 This paper intends to investigate the genesis of certain types of rich iron ore deposits in China through the experimental study of FeO-Ca₅（PO₄）₃F-NaAlSiO₄ -CaMg₂O₆ dry system. The melting experiments with iron crucible were made at 1403℃and in nitrogen current.The coexistence of two immiscible liquid phases was observed in the region with 30—60 wt.%Ca₅（PO₄）₃F（i.e.,12.7—25.4 wt.%P₂O₅）, and iron was enriched in one liquid phase.It is concluded that phosphate is responsible for the formation of the iron-enriched liquid named"ore-magma".and this supports the hypothesis that the iron-rich ore magma can be formed by this immiscibility in nature.This experimenal study gives a satisfactory explanation for the genesis of the iron-rich Meischan Mine and its neighbouring phosphate Taischan Mine in China.更多还原