Record details

Title
    Nanometer-scale measurements of iron oxidation states of cronstedtite from primitive meteorites
Statement of responsibility
    Thomas J. Zega, Laurence A. J. Garvie, Peter R. Buseck
Author
    Buseck, Peter R.
    Garvie, Laurence A. J.
    Zega, Thomas J.
Language
    anglicky
Source title - serial
    American mineralogist
Vol./nr.
    Vol. 88, no. 7
Pages
    p. 1169-1172
Year
    2003
Notes
    2 obr., 1 fot., 1 tab., 33 bibl.
    il.
    Zkr. název ser.: Amer. Mineralogist
Subject group
    chondrit
    cronstedtit
    hematit
    kosmochemie
    meteority
    oxidace
    spektrometrie
    systém solární
    železo
Geographical name
    ČR-Čechy
    Kutná Hora
Keyword
    Cronstedtite
    Iron
    Measurements
    Meteorites
    Nanometer-scale
    Oxidation
    Primitive
    States
Abstract (in english)
   We report the first nanometer-scale measurements of the iron (III) to total iron (Fe3+ sumFe) 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
Contributor
    Česká geologická služba
Contributor code
    ČGS (UNM)
Source format
    U
Entered date
    29. 1. 2008
Import date
    8. 8. 2012