Other
Scientific paper
Sep 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983natur.305..119z&link_type=abstract
Nature (ISSN 0028-0836), vol. 305, Sept. 8, 1983, p. 119-121.
Other
51
Abundance, Deuterium, Interplanetary Dust, Meteoritic Composition, Micrometeorites, Chondrites, Hydrogen, Isotopic Enrichment, Solar System, Interplanetary Dust, Cosmic Dust, Deuterium, Hydrogen, Element Ratios, Experiments, Photomicrographs, Rare Gases, Isotopes, Abundance, Origin, Patterns, Micrometeorites, Major Elements, Trace Elements, Enrichment, Comparisons, Samples, Extraterrestrial, Spectra, Data, Stratosphere, Basalt, Glass, Renazzo, Semarkona, Meteorites
Scientific paper
Measurements of noble gas elemental and isotopic abundance patterns have provided evidence that a subset of the particles collected in the upper atmosphere by NASA aircraft are micrometeorites. It is found that the deuterium in two such particles is enriched relative to hydrogen by 500-1100 per thousand when compared with the terrestrial SMOW standard. This result confirms the extraterrestrial origin of the dust particles and demonstrates that the material preserves a potentially unique isotopic record which may reflect a memory of processes occurring during or before the formation of the solar system. In addition, the deuterium enrichment seen in the particles is analogous to that observed in bulk samples of one carbonaceous meteorite and two unequilibrated ordinary chondrites as well as in chemical separates of a number of other meteorites.
McKeegan Kevin D.
Walker Rober M.
Zinner Emst
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