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Magnesium isotope compositions of reference samples analysed in multiple studies. The shaded areas show the mean and 2se of the isotope compositions observed in this study. Note that the plotted composition of Murchison for Bourdon et al.10 is a mean of the two replicates presented in their Table 1. The value for BHVO of Chakrabarti and Jacobsen16 is BHVO-1, all others are BHVO-2.
