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Solar-wind krypton and solid/gas fractionation in the early solar nebulaThe solar-system Kr abundance is calculated from solar-wind noble-gas ratios, determined previously by low-temperature oxidations of lunar ilmenite grains, normalized to Si by spacecraft solar-wind measurements. The estimated Kr-83 abundance of 4.1 + or - 1.5 per million Si atoms is within uncertainty of estimates assuming no fractionation, determined from CI-chondrite abundances of surrounding elements. This is significant because it is the first such constraint on solid/gas fractionation, though the large uncertainty only confines it to somewhat less than a factor of two.
Document ID
19910041672
Document Type
Reprint (Version printed in journal)
Authors
Wiens, Roger C. (California Inst. of Tech. Pasadena, CA, United States)
Burnett, D. S. (California Institute of Technology Pasadena, United States)
Neugebauer, M. (JPL Pasadena, CA, United States)
Pepin, R. O. (Minnesota, University Minneapolis, United States)
Date Acquired
August 14, 2013
Publication Date
February 1, 1991
Publication Information
Publication: Geophysical Research Letters
Volume: 18
ISSN: 0094-8276
Subject Category
LUNAR AND PLANETARY EXPLORATION
Funding Number(s)
CONTRACT_GRANT: NAG9-60
CONTRACT_GRANT: NAG9-94
Distribution Limits
Public
Copyright
Other