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摘要: 磁铁矿在自然界普遍存在,其成岩和成矿作用研究备受关注。文章系统地总结了近年来磁铁矿的研究进展,介绍了磁铁矿的研究方法体系,并探讨了其在矿床学研究中的应用。磁铁矿的研究方法包括磁铁矿的年代学、显微结构、元素和同位素组成。在磁铁矿的方法学基础上,进一步探讨了磁铁矿Re-Os同位素定年在成矿年代学研究中的应用、磁铁矿有关的温度计和氧逸度计以及矿床类型判别等。此外,以铁氧化物-铜-金和铁氧化物-磷灰石矿床为例,讨论了磁铁矿微量元素组成对这些矿床成因的制约,并初步总结了磁铁矿微量元素组成在找矿勘查方面的应用。磁铁矿作为重要的矿床学研究对象,已助推矿床成因和找矿勘查研究,具有巨大的应用潜力,包括原位U-Pb年代学和非传统稳定同位素示踪(如V同位素)等。然而,磁铁矿中微量元素的赋存状态、分配行为以及磁铁矿地球化学数据库等是磁铁矿研究中较薄弱的环节,亟需进一步加强。Abstract: As an ubiquitous mineral in nature, the diagenetic and mineralization studies on magnetite have attracted much attention. This article systematically summarizes recent years' research progress on magnetite, introduces magnetite research method system and its application in mineral deposit research. Magnetite research methodologies involve geochronology, microtexture, elemental and isotopic composition. On the basis of magnetite methodology, we discussed the application of magnetite Re-Os isotope dating in geochronology, magnetite-related thermometers and oxygen fugameters, as well as deposit type discrimination. In addition, taking iron oxide-copper-gold and iron oxide-apatite deposits as examples, the authors explored how trace elements in magnetite constrain their genesis, and summarized the participation of magnetite trace element in mineral exploration. As an important object in mineral deposit study, magnetite has been promoting ore genesis research and mineral exploration with much practical potential, involving its U-Pb geochronology and nontraditional stable isotopes(such as V isotopes). Nevertheless, the occurrence and partition behavior of trace elements in magnetite, and the magnetite geochemical database are still weak aspects which need enhancement in magnetite research.
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Key words:
- magnetite /
- microtexture /
- trace elements /
- geochronology /
- deposit types /
- mineral exploration
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