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Publication Detail
Comment on “Discovery of davemaoite, CaSiO₃-perovskite, as a mineral from the lower mantle”
  • Publication Type:
    Journal article
  • Publication Sub Type:
    Editorial Comment
  • Authors:
    Walter MJ, Kohn SC, Pearson DG, Shirey SB, Speich L, Stachel T, Thomson AR, Yang J
  • Publisher:
    American Association for the Advancement of Science (AAAS)
  • Publication date:
    06/05/2022
  • Journal:
    Science
  • Volume:
    376
  • Issue:
    6593
  • Status:
    Published
  • Print ISSN:
    0036-8075
  • Language:
    en
Abstract
Tschauner et al . (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 3 stoichiometry and is equally consistent with inclusions observed in other lithospheric diamonds.
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