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Characterisation of Q-gases and other noble gas components in the Murchison meteoriteNoble gases in several HF/HCl resistant residues of the CM2 chondrite Murchison were measured by closed-system stepped etching, in order to study the planetary gases in their major carrier 'Q'-an ill-defined minor phase, perhaps merely a set of adsorption sites. Neon, Ar, Kr, Xe, and probably also He in 'Q' of Murchison have the same isotopic and nearly the same elemental abundances as their counterparts in Allende (CV3). The isotopic composition of Ne-Q is consistent with mass-dependent fractionation of either solar wind Ne or Ne from solar energetic particles. Unlike Allende, Murchison during HNO3 attack release, besides Q-gases, large amounts of two other Ne-components, Ne-E and Ne-A3, a third subcomponent of Ne-A. This work confirms that Q-gases of well-defined composition were an important noble gas component in the early solar system an are now found in various classes of meteorites, such as carbonaceous chondrites, ureilites, and ordinary chondrites. Ne-Q may have played a role in the formation of noble gas reservoirs in terrestrial planets.
Document ID
19920065556
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Wieler, Rainer
(Zuerich Eidgenoessische Technische Hochschule, Zurich, Switzerland)
Anders, Edward
(Chicago, University IL, United States)
Baur, Heinrich
(Zuerich Eidgenoessische Technische Hochschule, Zurich, Switzerland)
Lewis, Roy S.
(Chicago, University IL, United States)
Signer, Peter
(Zuerich Eidgenoessische Technische Hochschule, Zurich, Switzerland)
Date Acquired
August 15, 2013
Publication Date
July 1, 1992
Publication Information
Publication: Geochimica et Cosmochimica Acta
Volume: 56
Issue: 7 Ju
ISSN: 0016-7037
Subject Category
Lunar And Planetary Exploration
Accession Number
92A48180
Funding Number(s)
CONTRACT_GRANT: NAG9-52
Distribution Limits
Public
Copyright
Other

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