Affiliation:
1. Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, CA 92093–0356, USA.
Abstract
Explaining Anomalous Early Isotopes
Meteorites contain some of the oldest materials formed in the solar system, including silicate minerals similar in composition to those on Earth. These meteorites, however, often differ in their oxygen isotopic composition, implying that their formation involved a different chemical mechanism than younger solar-system materials.
Chakraborty
et al.
(p.
463
) performed a series of experiments and found that mixing of SiO gas and OH leads to a mass-independent isotope fractionation in SiO
2
solid products similar to those observed in the oldest meteorites. This oxidation reaction may thus have served as the first source for silicates with anomalous oxygen isotopic compositions in the solar nebula.
Publisher
American Association for the Advancement of Science (AAAS)
Cited by
37 articles.
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