Nitrogen and xenon in acid residues of iron meteorites |
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| Authors: | SVS Murty PS Goel DVu Minh YuA Shukolyukov |
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| Institution: | Department of Chemistry, Indian Institute of Technology, Kanpur, Kanpur 208016, India;V. I. Vernadsky Institute of Geochemistry and Analytical Chemistry, USSR Academy of Sciences, Moscow, USSR |
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| Abstract: | 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% mass, contain 22% 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 124Xe and 126Xe which are strongly depleted in the non-magnetic residues. It is suggested that iron meteorites have trapped in their micro-inclusions, some pre-solar nebular matter which is isotopically heterogeneous. |
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| Keywords: | Author to whom correspondence to be addressed |
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