Determination of the Fe oxidation state of the Chassigny kaersutite: A microXANES spectroscopic study

Akira Monkawa, Takashi Mikouchi, Eisuke Koizumi, Kazumasa Sugiyama, Masamichi Miyamoto

Research output: Contribution to journalArticlepeer-review

19 Citations (Scopus)

Abstract

In order to elucidate the formation of low-H kaersutites in Martian meteorites, the Fe3+/ΣFe ratio of Chassigny kaersutites in magmatic inclusions was directly determined by the synchrotron microXANES analysis. XANES analysis for standard kaersutites with known Fe3+/ΣFe ratios shows a linear relationship between centroid energy positions of XANES pre-edge spectra and the Fe3+/ΣFe ratio. Based on the linear relationship, the Fe3+/ΣFe ratio of Chassigny kaersutites is estimated to be about 0.05. The low Fe3+/ΣFe ratio clearly suggests that low-H kaersutites in Chassigny are not likely to be formed by the oxidation-dehydrogenation reactions. The low-H content of the Chassigny kaersutites is mainly due to the presence of a Ti oxy-component.

Original languageEnglish
Pages (from-to)1321-1329
Number of pages9
JournalMeteoritics and Planetary Science
Volume41
Issue number9
DOIs
Publication statusPublished - 2006 Sep
Externally publishedYes

ASJC Scopus subject areas

  • Geophysics
  • Space and Planetary Science

Fingerprint Dive into the research topics of 'Determination of the Fe oxidation state of the Chassigny kaersutite: A microXANES spectroscopic study'. Together they form a unique fingerprint.

Cite this