标准溶液和岩石标样的Os同位素数据

本数据包括项目期间分析的溶液标样、岩石标样及地质样品的Pt-Os和Re-Os同位素数据。实验分析在中国科学院广州地球化学研究所深地过程与战略矿产资源全国重点实验室完成。岩石样品采用锑试金法预富集Os，通过蒸馏法分离Os，并利用微蒸馏法进一步纯化Os，最终使用Neptune Plus型多接收电感耦合等离子体质谱仪（MC-ICP-MS）进行高精度Os同位素测定。

在仪器分析过程中，采用杜伦大学DROsS Os标准溶液和HPS Os标准溶液作为过程监控标样，分析精度优于8 ppm，与已有文献报道结果在误差范围内一致。对岩石标样GPt-6、GPt-3、GBW07102、GPt-4、GPt-5和WPR-1进行了Os同位素分析，分析精度均优于8 ppm。本研究首次报道了GPt-6、GPt-3、GBW07102和GPt-4的Os同位素比值，GPt-5和WPR-1的分析结果则与前人数据在误差范围内相符。

数据分析表明，本实验室建立的锑试金法能高效富集Os，适用于低含量地质样品Os同位素的高精度分析。

This dataset includes Pt-Os and Re-Os isotope data of solution standards, rock standards, and geological samples analyzed during the project. The experimental analyses were conducted at the State Key Laboratory of Deep Earth Processes and Strategic Mineral Resources, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences. For rock samples, Os was pre-concentrated using the antimony fire assay method, separated via distillation, further purified by micro-distillation, and finally subjected to high-precision Os isotope determination using a Neptune Plus multi-collector inductively coupled plasma mass spectrometer (MC-ICP-MS).

During instrumental analysis, the Durham University DROsS Os standard solution and HPS Os standard solution were used as process monitoring standards. The analytical precision was better than 8 ppm, which is consistent with previously reported results in the literature within error ranges. Os isotope analyses were performed on rock standards GPt-6, GPt-3, GBW07102, GPt-4, GPt-5, and WPR-1, all with analytical precision better than 8 ppm. This study reports for the first time the Os isotope ratios of GPt-6, GPt-3, GBW07102, and GPt-4; the analytical results of GPt-5 and WPR-1 are consistent with previous data within error ranges.

Data analysis shows that the antimony fire assay method established in this laboratory can efficiently concentrate Os and is suitable for high-precision Os isotope analysis of geological samples with low Os content.