Comment on “Discovery of davemaoite, CaSiO3-perovskite, as a mineral from the lower mantle”

Michael J. Walter*, Simon C. Kohn, D. Graham Pearson, Steven B. Shirey, Laura Speich, Thomas Stachel, Andrew R. Thomson, Jing Yang

*Corresponding author for this work

Research output: Contribution to journalReview article (Academic Journal)peer-review

5 Citations (Scopus)

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 CaSiO3 stoichiometry and is equally consistent with inclusions observed in other lithospheric diamonds.

Original languageEnglish
Article numbereabo0882
JournalScience
Volume376
Issue number6593
DOIs
Publication statusPublished - 6 May 2022

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Structured keywords

  • PetrologyGroup

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