Abstract

The liquid phases are represented by immiscible Fe–S and Fe–C melts under partial melting of the graphite-saturated Fe–S–C system at P = 0.5 GPa and T = 1150, 1200, and 1250°C. Fe, Ni, Pt, and Au are predominantly concentrated in the Fe–C melt, and Cu, Pd, and Ag occur in the Fe–S melt as a result of fractionation of elements between coexisting liquids. The features of the geological setting of the formation of magmatic sulfide deposits in the Norilsk region and the chemical composition of ores indicate the contamination of the Fe-sulfide melt with carbon with liquation into Fe–C and Fe–S liquids coexisting with the silicate melt. The enrichment of the ore-forming Fe-sulfide melt of Cu, Pd, and AgC is associated with the redistribution of ore-forming elements between them, thereby providing the Pd–Cu specialization of sulfide ores in the Norilsk region.

中文翻译：

---

Fe–S–C系统在P = 0.5 GPa，T = 1100–1250°C时的相关系：Fe–S–C液化及其在岩浆硫化物矿床形成中的作用

摘要

液相由不相容的Fe–S和Fe–C熔体表示，在P = 0.5 GPa和T的情况下，石墨饱和的Fe–S–C系统的部分熔融= 1150、1200和1250°C。Fe，Ni，Pt和Au主要集中在Fe–C熔体中，而Cu，Pd和Ag在Fe–S熔体中由于元素在共存液体之间的分馏而出现。诺里尔斯克地区岩浆硫化物矿床形成的地质环境特征和矿石的化学成分表明，随着碳的液化，Fe-硫化铁熔体被碳污染，并与硅酸盐熔体共存，形成Fe-C和Fe-S液体。Cu，Pd和AgC的成矿铁硫化物熔体的富集与成矿元素在它们之间的重新分布有关，从而在Norilsk地区提供了Pd-Cu硫化矿的特殊化作用。