Carbon, Hydrogen, and Nitrogen Isotopic Composition of the Renazzo and Orgueil Organic Components
- Creators
- Robert, F.
- Epstein, S.
Abstract
The concentration and isotopic composition were determined for carbon, nitrogen, and hydrogen extracted from bulk samples and acid (HF-HCl) residues of Orgueil and Renazzo meteorites. The samples were heated step-wise and the measured quantities of gasses given off at each step were analyzed mass spectrometically. The whole rock δD and δ^(15)N values are +930‰ and + 190‰ for Renazzo and + 170‰ and + 40‰ for Orgueil respectively. Hydrogen concentrations from the acid residues, shows a bimodal release pattern at temperatures between 400 and 1300 ºC and the average δD of hydrogen from the acid residues from Renazzo is + 2500‰ and from Orgueil is + 1100‰. The δD of the hydrogen released at the high temperature release mode is on the average of + 1500‰ for Orgueil and + 3100‰ for Renazzo. The low temperature-release-hydrogen has a δD value of+ 1000‰ for Orgueil and +2000‰ for Renazzo. These results imply that the hydrogen isotopic composition is not homogeneously distributed among the various compounds of the acid residues. The δ^(13)C of the carbon in the acid residues measured -20‰ for Renazzo and -5‰ for Orgueil. With our previous results on δD's acid residues of Murray and Murchison ( +600‰ and +800‰ respectively) we are able to calculate by mass balance an approximate isotopic composition of phyllosilicates in these four meteorites. The δD's of inorganic hydrogen are calculated to be~ -250‰ for Murray, Murchison, and Orgueil.
Additional Information
© 1980 Meteoritical Society. Provided by the NASA Astrophysics Data System.Attached Files
Published - 1980Metic__15__355R.pdf
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Additional details
- Eprint ID
- 49199
- Resolver ID
- CaltechAUTHORS:20140903-133313827
- Created
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2014-09-03Created from EPrint's datestamp field
- Updated
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2019-10-03Created from EPrint's last_modified field