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Iron-enriched stardust grains in the meteorites
Acfer 094, QUE 99177 and MET 00426.
Bose M., Floss C., and Stadermann F. J. (2008)
71st Meteoritical Society Meeting, Abstract #5094.
ABSTRACT
In this study elemental compositions of the presolar
grains identified in Acfer 094 are measured in the Auger
Nanoprobe. Classification of the presolar silicates into
olivine and pyroxene is done on the basis of the
Fe+Mg(+Ca)/Si ratio. Fe-Mg silicates (e.g., olivine and
pyroxene) are expected to have Mg-rich compositions under
conditions of equilibrium condensation in the winds of
evolved stars. We also compare the presolar silicate grain
compositions found in Acfer 094 to those in the CR
chondrites QUE 99177 and MET 00426.
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