Extended Data Fig. 2: The correlation between SiO2 and alkali contents of the La Réunion samples. | Nature Geoscience

Extended Data Fig. 2: The correlation between SiO2 and alkali contents of the La Réunion samples.

From: Potassium-40 isotopic evidence for an extant pre-giant-impact component of Earth’s mantle

Extended Data Fig. 2

(a) SiO2 vs. total alkali (Na2O + K2O) (b) SiO2 vs. K2O. Data are from49. Blue circles denote the samples measured for K isotopic composition in this study. Sample RU0709, which shows no resolvable K anomaly, has the highest K2O content (0.73%) among the suite of La Réunion samples and plots above the 95% confidence interval of the correlation, suggesting a likely contamination with crustal K.

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