Nanometer-scale measurements of iron oxidation states of cronstedtite from primitive meteorites

Thomas J. Zega, Laurence Garvie, P R Buseck

Research output: Contribution to journalArticle

34 Citations (Scopus)

Abstract

We report the first nanometer-scale measurements of the iron (III) to total iron (Fe3+/ΣFe) ratios from primitive meteorites. These ratios from the matrices and fine-grained rims (FGRs) of the Murchison, Murray, and Cold Bokkeveld CM chondrites fall within a tight range, from 0.45 to 0.54 (±0.02). The measurements were made using electron energy-loss spectroscopy (EELS) on cronstedtite, which is a product of aqueous alteration early in the history of the solar system. The results indicate that the alteration of these meteorites, which display a broad range of alteration intensity, occurred under similar redox conditions and, further, that alteration likely occurred in situ on asteroidal bodies rather than in the solar nebula.

Original languageEnglish (US)
Pages (from-to)1169-1172
Number of pages4
JournalAmerican Mineralogist
Volume88
Issue number7
StatePublished - Jul 2003

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Meteorites
meteorites
meteorite
Iron
iron
oxidation
Oxidation
Solar system
Electron energy loss spectroscopy
redox conditions
chondrite
solar system
spectroscopy
electron
solar nebula
matrix
chondrites
history
rims
energy

ASJC Scopus subject areas

  • Geochemistry and Petrology
  • Geophysics

Cite this

Nanometer-scale measurements of iron oxidation states of cronstedtite from primitive meteorites. / Zega, Thomas J.; Garvie, Laurence; Buseck, P R.

In: American Mineralogist, Vol. 88, No. 7, 07.2003, p. 1169-1172.

Research output: Contribution to journalArticle

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