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. Author manuscript; available in PMC: 2018 Sep 21.
Published in final edited form as: Nature. 2018 Mar 21;555(7697):507–510. doi: 10.1038/nature25990

Extended Data Figure 2. Three isotope plot of reported average δ42/44Ca versus δ43/44Ca for Earth, meteorite parent bodies or chondrite groups relative to SRM 915b.

Extended Data Figure 2

Shown also is the mass dependent fractionation line predicted by kinetic mass fractionation. Uncertainties are the 2SE of the mean of the analyzed samples per group. Where only a single sample represents the group, the error represents the external reproducibility (0.05 and 0.03 for δ42/44Ca versus δ43/44Ca, respectively) or the analytical uncertainty of the measurement, whichever is larger.