Divalent chromium in ferropericlase inclusions in lower-mantle diamonds revealed by micro-XANES measurements

Shoko Odake, Satoshi Fukura, Masashi Arakawa, Atsuyuki Ohta, Ben Harte, Hiroyuki Kagi

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Chromium. K-edge X-ray absorption near-edge structure (XANES) spectra of natural ferropericlase were measured using an X-ray microbeam from a synchrotron radiation source to estimate the valence state of Cr. Measured samples were inclusions collected from lower-mantle diamonds. The obtained results revealed that divalent chromium is present in the materials in the lower mantle and that the proportion of Cr2+ in the total Cr content varied among the samples. The valence state of chromium in the inclusions in diamonds is a potential indicator of the redox conditions in the lower mantle.

Original languageEnglish
Pages (from-to)350-353
Number of pages4
JournalJournal of Mineralogical and Petrological Sciences
Volume103
Issue number5
DOIs
Publication statusPublished - Dec 1 2008
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Geophysics
  • Geology

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