Comparisons between Antarctic and non-Antarctic meteorites based on carbon isotope geochemistry

Details Comparisons between Antarctic and non-Antarctic meteorites based on carbon isotope geochemistry Comparisons between Antarctic and non-Antarctic meteorites based on carbon isotope geochemistry

Jan 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991gecoa..55...49g&link_type=abstract

(Workshop on Differences between Antarctic and non-Antarctic Meteorites, Vienna, Austria, July 27, 28, 1989) Geochimica et Cosmo

Computer Science

8

Antarctic Regions, Carbon Isotopes, Chondrites, Meteoritic Composition, Achondrites, Carbon 13, Geochemistry, Ureilites, Weathering, Meteorites, Antarctic Meteorites, Comparisons, Carbon, Samples, Meteorite, Isotopes, Geochemistry, Ordinary Chondrites, Chondrites, Ci Chondrites, Weathering, Carbonates, Composition, Laboratory Studies, Cm2 Chondrites, Achondrites, Ureilites, Hed Meteorites, Snc Meteorites, Concentration, Abundance, Contamination, Experiments, Procedure, C Chondrites, Catalog, Carbon 13

Scientific paper

Results are presented on the carbon steady-isotope geochemistry of Antarctic and non-Antarctic meteorites. It was found that, after weathering effects are taken into account, the ordinary chondrites from both the Antarctic and non-Antarctic populations had similar values of delta C-13. Similar results were obtained found in data from several achondrites (ureilites, HEDs, and SNCs), except that, in these groups, the weathering products do not influence total C data, as was the case for chondrites, suggesting a different complement of weathering products in chondrites and achondrites. It is suggested that all terrestrial contaminants should be removed from meteorites with low indigenous C budgets before interpreting their carbon abundance or isotopic composition. Results of this study indicate that Antarctic carbonaceous chondrites, rather than forming a separate population, may extend the range of properties of non-Antarctic carbonaceous chondrites beyond the currently known limits.

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