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Solar-wind krypton and solid/gas fractionation in the Early Solar Nebula

Wiens, Roger C. and Burnett, D. S. and Neugebauer, M. and Pepin, R. O. (1991) Solar-wind krypton and solid/gas fractionation in the Early Solar Nebula. Geophysical Research Letters, 18 (2). pp. 207-210. ISSN 0094-8276. doi:10.1029/91GL00213.

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Krypton is the best candidate for determining limits on solid/gas fractionation in the early sun because of the smoothness of the odd-mass abundance curve in its mass region, which permits relatively precise interpolations of its abundance assuming no fractionation. Here we calculate the solar-system Kr abundance 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 ^(83)Kr abundance of 4.1 ± 1.5 per 10^6 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.

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Wiens, Roger C.0000-0002-3409-7344
Burnett, D. S.0000-0001-9521-8675
Additional Information:Copyright 1991 by the American Geophysical Union. (Received August 17, 1990; revised November 19, 1990; accepted November 21, 1990) Paper number 91GL00213. This research was supported in part by NASA grants NAG 9-94 to D. Burnett and NAG 9-60 to R. O. Pepin. J. Kerridge and an anonymous reviewer are thanked for their assistance, and profitable discussions with D. Stevenson are acknowledged.
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ID Code:51516
Deposited By: George Porter
Deposited On:10 Nov 2014 21:28
Last Modified:10 Nov 2021 19:12

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