Ancient lavas reveal the presence of deep mantle reservoirs with anomalously light oxygen signatures. These lavas fingerprint heterogeneous mantle domains in early Earth that may have since been mixed away.
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Fiorentini, M. Primordial light oxygen pockets. Nature Geosci 10, 803–804 (2017). https://doi.org/10.1038/ngeo3056
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DOI: https://doi.org/10.1038/ngeo3056
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