Noble-gas-rich separates from ordinary chondrites

Details Noble-gas-rich separates from ordinary chondrites Noble-gas-rich separates from ordinary chondrites

Feb 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980gecoa..44..253m&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 44, Feb. 1980, p. 253-271. Research supported by the U.S. Department of Energy and NASA.

Computer Science

9

Chondrites, Meteoritic Composition, Minerals, Rare Gases, Abundance, Carbonaceous Chondrites, Hydrofluoric Acid, Isotopes, Mass Ratios, Meteorites, Chondrites, Rare Gases, Techniques, H Chondrites, Brownfield Meteorite, Dimmit Meteorite, Estacado Meteorite, Residues, Argon, Krypton, Xenon, Comparisons, Entrapment, Isotopes, Anomalies, Isotopic Ratios, Neon/Argon, Abundance, Procedure, Data, Analysis, Samples, Meteorite, Oxidation, Helium, Composition, Chemistry, Mass Spectrometers, Mineralogy, Concentration

Scientific paper

Acid-resistant residues were prepared by HCl-HF demineralization of three H-type ordinary chondrites: Brownfield 1937 (H3), Dimmitt (H3, 4), and Estacado (H6). These residues were found to contain a large proportion of the planetary-type trapped Ar, Kr, and Xe in the meteorites. The similarity of these acid residues to those from carbonaceous chondrites and LL-type ordinary chondrites suggests that the same phase carries the trapped noble gases in all these diverse meteorite types. Because the H group represents a large fraction of all meteorites, this result indicates that the gas-rich carrier phase is as universal as the trapped noble-gas component itself. When treated with an oxidizing etchant, the acid residues lost almost all their complement of noble gases.

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