Other
Scientific paper
Mar 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997lpi....28.1591w&link_type=abstract
Conference Paper, 28th Annual Lunar and Planetary Science Conference, p. 591.
Other
1
Mars Environment, Carbon Isotopes, Metabolism, Extraterrestrial Life, Meteoritic Composition, Carbonates, Kerogen, Teflon (Trademark), Contamination
Scientific paper
The carbon stable isotopic compositions of individual orange-colored grains are analyzed in order to elucidate the presence of iostopically light carbonates in A84. Emphasis is placed on an analysis of a composite of five individual grains, four of which are considered to have come from the same location within the sample. The delta(C-13) values started to trend from around -25 mil pct up to +4.2 mil pct as the temperature was increased to 425 C. Over the next four steps (up to 525 C), delta(C-13) changed markedly, down to -61.8 mil pct. It is suggested that the sample could be a practically pure carbonate material. Another possibility is that the isotopically light carbon is released from a refractory organic material, analogous to terrestrial kerogen.
Grady Michael
Pillinger Colin T.
Wright Ian P.
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