Endogenous Carbon in Carbonaceous Meteorites

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Science  06 Mar 1970:
Vol. 167, Issue 3923, pp. 1367-1370
DOI: 10.1126/science.167.3923.1367


Seven carbonaceous chondrites have been analyzed for soluble organic compounds, carbonate, and residual carbon. Carbon-13/carbon-12 isotopic mneasurements on these fractions gave the following values relative to a marine carbonate standard: carbonate, +40 to +70 per mil; residual carbon, -15 to -17 per mil; soluble organic material, -17 to -27 per mil, with one value of -5.5 per mil. These values are interpreted to indicate that carbonate, residual carbon, and part of the extractable organic material are endogenous to these meteorites.

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