The carbon and oxygen isotopic composition of meteoritic carbonates

Details The carbon and oxygen isotopic composition of meteoritic carbonates The carbon and oxygen isotopic composition of meteoritic carbonates

Dec 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988gecoa..52.2855g&link_type=abstract

Geochimica et Cosmochimica Acta (ISSN 0016-7037), vol. 52, Dec. 1988, p. 2855-2866. Research supported by SERC.

Computer Science

30

Carbon Isotopes, Carbonates, Meteoritic Composition, Oxygen Isotopes, Carbides, Carbonaceous Chondrites, High Temperature Environments

Scientific paper

Results are presented on the carbon and oxygen isotopic composition analyses of over thirty CI, CM, and CR meteorites, together with a few data for CV, CO, and ordinary chondrites. Results indicate that meteoritic carbonates in CI, CM, and CR carbonaceous chondrites are enriched in C-13; the C-13-rich carbon is produced from a dissolution of carbonate minerals and is not a by-product of the reaction between acid and 'exotic' isotopically heavy carbonaceous components. Large internal variations in delta-C-13 and delta-O-18 were found in individual meteorites, suggesting that two or more isotopically distinct carbonates of different origin may be present.

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