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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. 42 (8, Suppl.), A145.
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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