Abstract Galena–tetrahedrite intergrowth textures have been observed in some quenched run products of melting experiments conducted at 500 and 600°C in the systems ZnS–PbS–FeS–Cu2S–Sb2S3 and ZnS–PbS–FeS–Cu2S–Sb2S3–As2S3, using the evacuated silica-tube method. At 600°C the intergrowth formed an interface between sulfide melt and galena, whereas at 500°C it existed as inclusions partially embedded or completely embedded within tetrahedrite. At 600°C tetrahedrite was absent in PbS-bearing experiments, instead galena and melt were a part of the equilibrium phase assemblage. From the disposition of the galena–tetrahedrite intergrowths at 500°C it is evident that droplets of galena–tetrahedrite melt coexisted with tetrahedrite or tetrahedrite + galena and gave rise to these intergrowths upon quenching. The intergrowths coexisting with galena probably represent compositions on the galena-rich liquidus in the galena–tetrahedrite binary and those coexisting with tetrahedrite represent points on the tetrahedrite-rich liquidus. A eutectic at galena:tetrahedrite = ~30:70, very close to 500°C is apparent. It is clearly indicated that galena–tetrahedrite intergrowths can be formed by sulfide partial melting, and could be used as a potential indicator of partial melting in metamorphosed sulfide ore deposits.

中文翻译：

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硫化物部分熔化和方铅矿-四面体共生结构：实验研究

摘要 在 ZnS–PbS–FeS–Cu2S–Sb2S3 和 ZnS–PbS–FeS–Cu2S–Sb2S3–As2S3 系统中，在 500 和 600°C 下进行的一些淬火实验产品中观察到方铅矿-四面体共生长结构，使用真空硅胶管法。在 600°C 时，共生物在硫化物熔体和方铅矿之间形成界面，而在 500°C 时，它作为部分嵌入或完全嵌入四面体的夹杂物存在。在 600°C 时，含 PbS 实验中不存在四面体，相反，方铅矿和熔体是平衡相组合的一部分。从方铅矿-四面体晶硅共生物在 500°C 下的分布可以看出，方铅矿-四面体晶石熔体的液滴与四面体晶石或四面体晶石+方铅矿共存，并在淬火时产生这些共生体。与方铅矿共存的共生体可能代表方铅矿-四面体二元体中富含方铅矿的液相线上的成分，与方晶石共存的共生体代表富含方铅矿的液相线上的点。方铅矿：四面体 = ~30:70 处的共晶，非常接近 500°C 是显而易见的。清楚地表明，方铅矿-四面体陨石共生体可以通过硫化物部分熔融形成，可作为变质硫化物矿床部分熔融的潜在指标。