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Interstellar Organic Matter in Meteorites

Yang, J. and Epstein, S. (1983) Interstellar Organic Matter in Meteorites. Meteoritics, 18 (4). pp. 429-430. ISSN 0026-1114.

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We have inferred that many meteorites contain organic matter of interstellar origin in acid (HC1,HF) treated residues (Yang and Epstein, 1982, 1983b). Hydrogen in the acid soluble matter shows two different hydrogen sources (Yang and Epstein, 1983a). A direct relationship is found between the δD values of the hydrogen in acid soluble matter and the C/H ratios of the acid soluble matter in four meteorites. This suggests that for the two sources of the hydrogen, one has a C/H = 0 and δD ≃ -110‰ (phyllosilicates formed at T ≥ 200K) and the other has a C/H ≥ 2 and δD ≥10,000‰ (organic matter). The latter organic matter has a D/H ratio of about 0.002, comparable to the typical D/H values (Penzias, 1980) observed for the interstellar organic molecules in giant clouds. This supports an ion-molecule reaction mechanism (Watson, 1976; Smith et al., 1982) of the D-rich molecules in the meteorites.

Item Type:Article
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Additional Information:© 1983 Meteoritical Society.
Issue or Number:4
Record Number:CaltechAUTHORS:20131030-092523963
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:42135
Deposited By: Tony Diaz
Deposited On:01 Nov 2013 20:02
Last Modified:03 Oct 2019 05:55

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