C-anomalous phases in QUE 99177 and MET 00426.
Floss C. and Stadermann F. J. (2008)
Meteorit. Planet. Sci. 43 (7, Suppl.), A44.
Carbon-rich phases (e.g., nanodiamonds, SiC, graphite) were
the first forms of stardust identified in primitive meteorites and,
with the exception of nanodiamonds, are usually present in
concentrations of <10- 20 ppm. We have been investigating the
stardust inventories of two primitive CR chondrites, QUE 99177 and MET
00426, which have very high abundances of O-anomalous presolar grains.
Here we report on the C-bearing presolar phases found in these two