TY - JOUR
T1 - Nanometer-scale measurements of iron oxidation states of cronstedtite from primitive meteorites
AU - Zega, Thomas J.
AU - Garvie, Laurence
AU - Buseck, P R
PY - 2003/7
Y1 - 2003/7
N2 - 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.
AB - 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.
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U2 - 10.2138/am-2003-0726
DO - 10.2138/am-2003-0726
M3 - Article
AN - SCOPUS:0041627403
SN - 0003-004X
VL - 88
SP - 1169
EP - 1172
JO - American Mineralogist
JF - American Mineralogist
IS - 7
ER -