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Presolar Fe oxide from the Acfer 094
carbonaceous chondrite.
Stadermann F. J., Bose M., and Floss C. (2007)
Meteorit. Planet. Sci., Abstract #5061.
ABSTRACT
Acfer 094 is one of the most primitive carbonaceous
chondrites and contains high abundances of presolar silicate
grains. However, little is known about the compositions of
many of these grains. We are carrying out combined NanoSIMS
and Auger Nanoprobe analyses of size separated fractions of
Acfer 094 silicate matrix material in order to investigate
the elemental and isotopic compositions of both silicate and
oxide grains. We have identified presolar grains from Acfer
094 on the basis of their O isotopic compositions and
determined their elemental compositions. Here we discuss a
unique grain, 34C-10, that consists essentially only of Fe
and O.
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