Physics
Scientific paper
Dec 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979natur.282..785r&link_type=abstract
Nature, vol. 282, Dec. 20-27, 1979, p. 785-789.
Physics
22
Chondrites, Deuterium, Hydrogen Isotopes, Oxygen Isotopes, Proton Irradiation, Solar System, Chemical Composition, Condensing, Water
Scientific paper
The O-18 and O-17 abundances of samples of the Chainpur chondrite whose D/H ratios have been found to range from 140 to 218 ppm, are measured in order to investigate possible relationships between deuterium content and oxygen isotope ratios and models of meteorite accretion. Hydrogen and oxygen isotope analyses of chondrule and matrix samples of the LL3 chondrite reveal some of the highest D/H values recorded in natural samples and the greatest O-17/O-16 ratio of any object yet analyzed. Results are discussed in terms of temperature-dependent physicochemical fractionation and the early irradiation of the meteorite or its parent body within the solar system. Energetic and chemical constraints on the irradiation model are considered, and it is concluded that this model can account for most of the observed hydrogen and oxygen isotope features.
Javoy Marc
Merlivat Liliane
Robert Frédéric
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