Data for: Redox reactions control Cu and Fe isotope fractionation in a magmatic Ni-Cu mineralization system

Copper and Fe are redox-sensitive metals, and their isotopic compositions may potentially record changes of oxidation conditions in high-temperature magmatic Ni–Cu mineralization systems. High-precision Cu and Fe isotope data for sulfides (chalcopyrite) and whole-rock samples of the Tulaergen magmatic Ni–Cu system (NW China) were analyzed to evaluate redox-induced fractionation during segregation of sulfide melt from silicate melt and internal fractionation within segregated sulfide melt. Table 1 Chalcophile elements (PGE, Cu, and Ni) and S contents of whole-rock samples from the Tulaergen deposit. Table 2 Copper and Fe isotopic compositions and Cu/Fe ratios of chalcopyrite separates, and whole-rock Fe isotopic compositions from the Tulaergen magmatic Ni–Cu mineralization system.铜（Cu）与铁（Fe）均为氧化还原敏感金属，其同位素组成可潜在记录高温岩浆镍铜成矿系统的氧化条件演化。针对中国西北吐拉尔根（Tulaergen）岩浆镍铜成矿系统的硫化物（黄铜矿（chalcopyrite））及全岩样品，本研究分析了高精度铜、铁同位素数据，以评估硫化物熔体与硅酸盐熔体分离过程中氧化还原诱导的同位素分馏，以及分离后硫化物熔体内部的同位素分馏过程。 表1 吐拉尔根矿床全岩样品的亲铜元素（PGE、Cu、Ni）及硫（S）含量 表2 吐拉尔根岩浆镍铜成矿系统中黄铜矿单矿物的铜、铁同位素组成与铜铁比（Cu/Fe），以及全岩铁同位素组成