This study reports an improved procedure for the simultaneous determination of Re–Os and S isotopic compositions of sulfur-bearing minerals using negative thermal ionization mass spectrometry (N-TIMS) and multicollector-inductively coupled plasma-mass spectrometry (MC-ICP-MS), respectively. This approach uses a Carius tube digestion technique during inverse aqua regia digestion to avoid the incomplete decomposition of sulfide minerals and the partial loss of S and Os during acid digestion. The sequential separation and purification of S and Re from sample matrix elements is undertaken after Os separation by CCl₄ solvent extraction and utilizes a two-stage tandem column setup using cation and anion exchange resins. Sulfur is not adsorbed onto either of the cation or anion exchange resin columns and can be directly eluted using 0.1 mol L⁻¹ HNO₃, whereas Re is adsorbed onto the anion exchange resin column. This approach allowed the quantitative recovery of S (99.8%) and Re (99.7%), and the efficient removal of matrix elements from the final purified sample. The δ³⁴S values of IAEA S-2, S-3, and IAPSO seawater standards determined during this study (calibrated using the IAEA S-1 standard) are consistent with the certified values and are of higher precision than the values obtained using conventional analytical techniques. Our approach can also be used with different kinds of sulfide minerals. This combined Re–Os–S isotopic analysis provides useful information on the timing of ore deposit formation and constrains the source of the ore-forming fluid material. This approach also allows the determination of Re–Os and S isotopic compositions of single sample digestion, thereby avoiding problems with sample heterogeneity that can arise when comparing S and Re–Os isotopic data generated by conventional approaches.

中文翻译：

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使用基于Carius管消解的N-TIMS和MC-ICP-MS方法同时测量含硫矿物的Re-Os和S同位素组成

这项研究报告了使用负热电离质谱（N-TIMS）和多收集器-电感耦合等离子体质谱（MC-ICP-MS）同时测定含硫矿物中Re-Os和S同位素组成的改进程序， 分别。该方法在逆王水消化过程中使用Carius管消化技术，以避免硫化物矿物的不完全分解以及酸消化过程中S和Os的部分损失。在通过CCl ₄进行Os分离之后，从样品基质元素中依次分离和纯化S和Re溶剂萃取，并利用两级串联色谱柱设置使用阳离子和阴离子交换树脂。硫不吸附在阳离子交换树脂柱或阴离子交换树脂柱上，可以使用0.1 mol L ^-1 HNO ₃直接洗脱，而Re吸附在阴离子交换树脂柱上。这种方法可以定量回收S（99.8％）和Re（99.7％），并从最终纯化的样品中有效去除基质元素。的δ ³⁴在这项研究中确定的IAEA S-2，S-3和IAPSO海水标准品的S值（使用IAEA S-1标准进行校准）与认证值一致，并且比使用常规分析技术获得的值具有更高的精度。我们的方法也可以用于不同种类的硫化物矿物。这种结合的Re-Os-S同位素分析提供了有关矿床形成时间的有用信息，并限制了成矿流体材料的来源。这种方法还可以确定单个样品消解的Re-Os和S同位素组成，从而避免了比较传统方法生成的S和Re-Os同位素数据时可能出现的样品异质性问题。