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Isotopic anomalies of Ne, Xe, and C in meteorites. I - Separation of carriers by density and chemical resistanceThe 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.
Document ID
19880057351
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Ming, Tang
(Chicago Univ. Chicago, IL, United States)
Lewis, Roy S.
(Chicago Univ. Chicago, IL, United States)
Anders, Edward
(Chicago, University IL, United States)
Grady, M. M.
(Chicago Univ. Chicago, IL, United States)
Wright, I. P.
(Open University Milton Keynes, United Kingdom)
Date Acquired
August 13, 2013
Publication Date
May 1, 1988
Publication Information
Publication: Geochimica et Cosmochimica Acta
Volume: 52
ISSN: 0016-7037
Subject Category
Lunar And Planetary Exploration
Accession Number
88A44578
Funding Number(s)
CONTRACT_GRANT: NAG9-52
Distribution Limits
Public
Copyright
Other

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