Other
Scientific paper
Mar 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999e%26psl.167...71b&link_type=abstract
Earth and Planetary Science Letters, Volume 167, Issue 1-2, p. 71-79.
Other
17
Scientific paper
Stable carbon isotope measurements of the organic matter associated with the carbonate globules and the bulk matrix material in the ALH84001 Martian meteorite indicate that two distinct sources are present in the sample. The δ13C values for the organic matter associated with the carbonate globules averaged -26‰ and is attributed to terrestrial contamination. In contrast, the δ13C values for the organic matter associated with the bulk matrix material yielded a value of -15‰. The only common sources of carbon on the Earth that yield similar δ13C values, other then some diagenetically altered marine carbonates, are C4 plants. A δ13C value of -15‰, on the other hand, is consistent with a kerogen-like component, the most ubiquitous form of organic matter found in carbonaceous chondrites such as the Murchison meteorite. Examination of the carbonate globules and bulk matrix material using laser desorption mass spectrometry (LDMS) indicates the presence of a high molecular weight organic component which appears to be extraterrestrial in origin, possibly derived from the exogenous delivery of meteoritic or cometary debris to the surface of Mars.
Bada Jeffrey L.
Becker Lee
Popp Brian
Rust Thomas
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