The concentration and isotopic composition of hydrogen, carbon and nitrogen in carbonaceous meteorites

Details The concentration and isotopic composition of hydrogen, carbon and nitrogen in carbonaceous meteorites The concentration and isotopic composition of hydrogen, carbon and nitrogen in carbonaceous meteorites

Jan 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982gecoa..46...81r&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 46, Jan. 1982, p. 81-95.

Computer Science

106

Carbon Isotopes, Carbonaceous Chondrites, Hydrogen Isotopes, Meteoritic Composition, Nitrogen Isotopes, Pyrolysis, Abundance, Acidity, Hydrofluoric Acid, Hydrogen Chlorides, Murray Meteorite, Organic Compounds, Orgueil Meteorite, Oxidation, Allende Meteorite, Origin, Phyllosilicates, Solar Nebula, Spallation, Helium, Meteorites, Carbonaceous Chondrites, Concentration, Composition, Isotopes, Hydrogen, Carbon, Nitrogen, Pyrolysis, Grains, Samples, Meteorite, Residues, Techniques, Orgueil Meteorite, Procedure,

Scientific paper

Stepwise pyrolysis was used to extract H2, N2 and C from powdered meteorites and from meteorite residues resulting from partial dissolution in aqueous HF or from reaction with HF-HCl solutions. Concentrations and isotopic compositions were determined for the cases of the carbonaceous chondrites Orgueil, Murray, Murchison, Renazzo and Cold Bokkeveld. Acidification of the meteorites removed the organic sources of H2, so that H2 in the HF-HCl acid residues came mostly from the insoluble organic matter making up 70-80% of the total carbon in carbonaceous meteorites. Good correlation is found between delta-D and the concentration of H2 in the acid residues, but no correlation exists between the delta-D, delta-C-13 and delta-N-15 in them. A model is proposed for both the high delta-D values and the relationship between those values and the H2 concentration.

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