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Helium and neon isotopes in stratospheric particlesHe and Ne isotope ratios were determined for 16 interplanetary dust particles (IDPs) collected in the stratosphere. The observed He concentration varied greatly from particle to particle, with the highest values approaching those found for lunar surface fines and some gas-rich meteorites. The average Ne-20/Ne-22 ratio was 12.0 + or - 0.5. The data suggest that the observed IDPs could have entered the atmosphere at relatively low velocities, and hence may be primarily of asteroidal rather than cometary origin.
Document ID
19910041006
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Nier, A. O.
(Minnesota Univ. Minneapolis, MN, United States)
Schlutter, D. J.
(Minnesota, University Minneapolis, United States)
Date Acquired
August 14, 2013
Publication Date
December 1, 1990
Publication Information
Publication: Meteoritics
Volume: 25
ISSN: 0026-1114
Subject Category
Lunar And Planetary Exploration
Accession Number
91A25629
Funding Number(s)
CONTRACT_GRANT: NAG9-110
Distribution Limits
Public
Copyright
Other

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