Hydrogen and oxygen isotope compositions in kerogen from the Orgueil meteorite - Clues to a solar origin

Details Hydrogen and oxygen isotope compositions in kerogen from the Orgueil meteorite - Clues to a solar origin Hydrogen and oxygen isotope compositions in kerogen from the Orgueil meteorite - Clues to a solar origin

May 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990gecoa..54.1453h&link_type=abstract

Geochimica et Cosmochimica Acta (ISSN 0016-7037), vol. 54, May 1990, p. 1453-1462. Research supported by INSU.

Computer Science

17

Hydrogen Isotopes, Isotopic Labeling, Kerogen, Orgueil Meteorite, Oxygen Isotopes, Composition, Molecular Clouds, Solar Corona, Solar System, Meteorites, Hydrogen, Oxygen, Isotopes, Composition, Kerogen, Orgueil, Origin, Formation, Contamination, Laboratory Studies, Solar Nebula, Techniques, Samples, Meteorite, Ci Chondrties, C Chondrites, Procedure, Stony Meteorites, Analysis, Pyrolysis, Carbon, Nitrogen, Hydrogen

Scientific paper

Hydrogen and oxygen isotope contamination of acid-demineralized residues of the Orgueil carbonaceous meteorite has been accurately determined by an original method involving isotopically labeled reagents. Results are consistent with contamination occurring by addition and by isotopic exchange of a fraction of the indigenous reservoir with the reagents. The isotopic compositions of the uncontaminated nonexchangeable fraction of the acid residues are: deltaD = +1360 percent, deltaO-17 = +3.3 percent, and deltaO-18 = +6.0 percent. These results imply that, if organic oxygen and hydrogen acquired their isotopic compositions in the same environment, the process yielding the large deuterium enrichment of the insoluble kerogen has occurred within the dense molecular cloud that gave birth to the solar nebula.

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