Isotopic anomalies of Ne, Xe, and C in meteorites. I - Separation of carriers by density and chemical resistance

Details Isotopic anomalies of Ne, Xe, and C in meteorites. I - Separation of carriers by density and chemical resistance Isotopic anomalies of Ne, Xe, and C in meteorites. I - Separation of carriers by density and chemical resistance

May 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988gecoa..52.1221m&link_type=abstract

Geochimica et Cosmochimica Acta (ISSN 0016-7037), vol. 52, May 1988, p. 1221-1234. SERC-supported research.

Computer Science

14

Carbon Isotopes, Meteoritic Composition, Neon Isotopes, Rare Gases, Xenon Isotopes, Chromium Oxides, Isotopic Enrichment, Nitric Acid, Perchloric Acid, Meteorites, Isotopes, Anomalies, Neon, Xenon, Carbon, Rare Gases, Samples, Meteorites, Laboratory Studies, Murray, Murchison, Enrichment, Procedure, Nitrogen, Spectrometry, Spinel, Origin, Graphite

Scientific paper

The carriers of presolar noble gases were studied by isotopically analyzing 19 separates from the Murray and Murchison C2 chondrites for Ne, Xe, C, and N. It is found that the carriers of Ne-E(H) and Xe-S are resistant to HCl, HF, boiling HClO4, and CrO3-H2SO4, and thus must be either diamond or some resistant carbide or oxide. The carrier of Ne-E(L) may be some form of amorphous carbon with delta C13 of about +340 percent. A new carbon component, C theta, found as 0.2-2-micron inclusions in Murchison spinel, is amorphous and contains little or no noble gas. A new heavy nitrogen component is found which has an abundance of about 1 ppm in the bulk meteorite, combusts at 450-500 C, and may be associated wtih isotopically normal carbon or with C-alpha.

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