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Auger analysis of presolar silicates in Acfer
094 & the discovery of a presolar CAI.
Vollmer C., Stadermann F. J., Bose M., Floss C., Hoppe
P., and Brenker F. E. (2007)
Meteorit. Planet. Sci., Abstract #5107.
ABSTRACT
Mineralogical characterization of presolar silicates is
an analytical challenge due to their small size (usually
<0.5 µm) and surrounding "normal" silicates.
However, such investigations are crucial in understanding
formation histories of these grains. Transmission electron
microscopy (TEM) is typically the method of choice, but
preparation of electron transparent lamellae from meteoritic
grains is a difficult and time consuming task. Auger
spectroscopy provides a promising analytical alternative:
elemental information of sub- m sized grains can be obtained
with ~10-20 nm resolution without elaborate sample
preparation. Here we report on Auger spectroscopy results of
presolar silicates in Acfer 094.
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