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Composition of solar wind noble gases released by surface oxidation of a metal separate from the Weston meteoriteThe paper reports on a set of experiments intended to test the feasibility of determining elemental and isotopic ratios of the noble gases and nitrogen in the solar wind in metal separates from gas-rich ordinary chondrites. Helium, neon, and argon show clear evidence of a solar wind signature, while no solar component could be identified for xenon and nitrogen. Helium, neon, and argon elemental isotopic ratios appear to depend on depth within the metal grains. The ratios derived indicate that the Weston meteorite did not acquire its solar wind gases from a recent exposure to solar wind, but more probably at a time in the past similar to or even earlier than the exposure time of Apollo 17 breccias. The Ar-36/Ar-38 ratio, in tandem with other recent determinations of this value, indicates that the solar and terrestrial values can no longer be assumed to be equivalent.
Document ID
19910055022
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Becker, R. H.
(Minnesota Univ. Minneapolis, MN, United States)
Pepin, R. O.
(Minnesota, University Minneapolis, United States)
Date Acquired
August 15, 2013
Publication Date
April 1, 1991
Publication Information
Publication: Earth and Planetary Science Letters
Volume: 103
Issue: 4-Jan
ISSN: 0012-821X
Subject Category
Lunar And Planetary Exploration
Accession Number
91A39645
Funding Number(s)
CONTRACT_GRANT: NAG9-60
Distribution Limits
Public
Copyright
Other

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