Comment on "Discovery of davemaoite, CaSiO<sub>3</sub>-perovskite, as a mineral from the lower mantle".
editorial · Level V
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- Record sourced from PubMed, PMID 35536897.
- Also identified by DOI 10.1126/science.abo0882.
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Abstract
Tschauner <i>et al</i>. (Reports, 11 November 2021, p. 891) present evidence that diamond GRR-1507 formed in the lower mantle. Instead, the data support a much shallower origin in cold, subcratonic lithospheric mantle. X-ray diffraction data are well matched to phases common in microinclusion-bearing lithospheric diamonds. The calculated bulk inclusion composition is too imprecise to uniquely confirm CaSiO<sub>3</sub> stoichiometry and is equally consistent with inclusions observed in other lithospheric diamonds.