Nitrogen and xenon in acid residues of iron meteorites

Details Nitrogen and xenon in acid residues of iron meteorites Nitrogen and xenon in acid residues of iron meteorites

Jun 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983gecoa..47.1061m&link_type=abstract

Geochimica et Cosmochimica Acta (ISSN 0016-7037), vol. 47, June 1983, p. 1061-1068. Research supported by the Department of Spac

Computer Science

4

Iron Meteorites, Meteoritic Composition, Nitrogen, Residues, Xenon Isotopes, Cobalt, Iridium, Lithium, Neutron Activation Analysis

Scientific paper

Total nitrogen, measured by neutron activation analysis, is highly enriched in residues from iron meteorites obtained by dissolution of the metal in dilute H2SO4, relative to the bulk value. On the average, the residues, representing 3 percent mass, contain 22 percent of total N. Group IA has more dissolved N than IIIA. Lithium and Ir show a distribution pattern parallel to N. Total Xe has been measured in several residues and its isotopic composition is similar to atmospheric Xe for mass numbers 131 to 136 but not for Xe-124 and Xe-126 which are strongly depleted in the nonmagnetic residues. It is suggested that iron meteorites have trapped in their microinclusions some presolar nebular matter which is isotopically heterogeneous.

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