Cadmium stable isotope ratios can serve as valuable tracers for biological and geological processes, including nutrients sampling from the surrounding medium, volatilization events, and terrestrial differentiation. However, studies of the isotope fractionation occurring during geological processes require the characterization of the isotope compositions of the different terrestrial reservoirs. Notably, the cadmium isotopic composition of the Bulk Silicate Earth (BSE) is still a matter of debate. To address this issue, we present high-precision cadmium isotope data from a diverse set of samples, including mid-oceanic ridge basalts (MORB) and komatiites obtained using a CdCd double spike system. We processed nine biological and geological reference materials (AGV-2, BCR-2, BHVO-2, BIR-1, COQ 1, GSP-2, NIST 2711, NOD-A-1, ERM BB 186) and two pure Cd solutions (AAS and ChemLab) to assess the accuracy and precision of the method.

中文翻译：

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通过对海洋玄武岩和科马提岩的分析推断地幔的镉同位素组成

镉稳定同位素比率可以作为生物和地质过程的有价值的示踪剂，包括从周围介质中取样、挥发事件和陆地分化。然而，对地质过程中发生的同位素分馏的研究需要对不同陆地储层的同位素组成进行表征。值得注意的是，块状硅酸盐地球（BSE）的镉同位素组成仍然是一个有争议的问题。为了解决这个问题，我们提供了来自不同样本的高精度镉同位素数据，包括使用 CdCd 双尖峰系统获得的大洋中脊玄武岩 (MORB) 和科马提岩。我们处理了九种生物和地质标准物质（AGV-2、BCR-2、BHVO-2、BIR-1、COQ 1、GSP-2、NIST 2711、NOD-A-1、ERM BB 186）和两种纯镉溶液（AAS 和 ChemLab）评估方法的准确性和精密度。