Constraints on Neon and Argon Isotopic Fractionation in Solar Wind
Abstract
To evaluate the isotopic composition of the solar nebula from which the planets formed, the relation between isotopes measured in the solar wind and on the Sun's surface needs to be known. The Genesis Discovery mission returned independent samples of three types of solar wind produced by different solar processes that provide a check on possible isotopic variations, or fractionation, between the solar-wind and solar-surface material. At a high level of precision, we observed no significant inter-regime differences in 20Ne/22Ne or 36Ar/38Ar values. For 20Ne/22Ne, the difference between low- and high-speed wind components is 0.24 ± 0.37%; for 36Ar/38Ar, it is 0.11 ± 0.26%. Our measured 36Ar/38Ar ratio in the solar wind of 5.501 ± 0.005 is 3.42 ± 0.09% higher than that of the terrestrial atmosphere, which may reflect atmospheric losses early in Earth's history.
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References and Notes
1
H. Palme, A. Jones, in vol. 1 of Treatise of Geochemistry, A. M. Davis, Ed. (Elsevier, Amsterdam, 2003), chap. 3, pp. 41–61.
2
R. N. Clayton, in vol. 1 of Treatise of Geochemistry, A. M. Davis, Ed. (Elsevier, Amsterdam, 2003), chap. 6., pp. 129–142.
3
H. Busemannet al., Science312, 727 (2006).
4
R. Wieler, H. Busemann, I. Franchi, in Meteorites and the Early Solar System II, D. S. Lauretta, H. McSween Jr., Eds. (Univ. of Arizona, Tucson, AZ, 2006), part vi, pp. 499–521.
5
Nuclear-energy generation in the interior of the Sun has produced significant elemental and isotopic changes, but matter is not exchanged between the inner and outer regions, so with a few exceptions, the composition of the solar surface has remained unchanged since the beginning of the solar system.
6
J. Geiss, G. Gloeckler, Space Sci. Rev.106, 3 (2003).
7
J. Geisset al., Space Sci. Rev.110, 307 (2004).
8
R. von Steigeret al., Space Sci. Rev.97, 123 (2001).
9
R. von Steiger, J. Geiss, Astron. Astrophys.225, 222 (1989).
10
J. Geiss, P. Hirt, H. Leutwyler, Solar Phys.12, 458 (1970).
11
R. Bodmer, P. Bochsler, Astron. Astrophys.337, 921 (1998).
12
D. S. Burnettet al., Space Sci. Rev.105, 509 (2003).
13
M. Neugebaueret al., Space Sci. Rev.105, 661 (2003).
14
D. B. Reisenfeldet al., Am. Inst. Phys. Conf. Proc.679, 632 (2003).
15
J. C. Mabryet al., Lunar Planet. Sci. Conf.XXXVIII, abstr. 1338 (2007).
16
Materials and methods are available as supporting material on Science Online.
17
C. M. Hohenberg, N. Thonnard, A. Meshik, Meteorit. Planet. Sci.37, 257 (2002).
18
V. S. Heber, H. Baur, D. Burnett, R. Wieler, Lunar Planet. Sci. Conf.XXXVIII, abstr. 1894 (2007).
19
A. Grimberget al., Science314, 1133 (2006).
20
S. Basu, H. M. Antia, Astrophys. J.606, L85 (2004).
21
J. Geiss, G. Gloeckler, R. von Steiger, Space Sci. Rev.72, 49 (1995).
22
M. Ozima, R. Wieler, B. Marty, F. Podosek, Geochim. Cosmochim. Acta62, 301 (1998).
23
R. O. Pepin, Earth Planet. Sci. Lett.252, 1 (2006).
24
R. N. Clayton, Earth Planet. Sci. Lett.13, 455 (1972).
25
J. M. Weygand, F. Ipavich, P. Wurz, J. Paquette, P. Bochsler, Geochim. Cosomochim. Acta65, 4589 (2001).
26
J.-P. Benkert, H. Baur, P. Signer, R. Wieler, J. Geophys. Res. (Planets)98, 13147 (1993).
27
R. L. Palma, R. Becker, R. Pepin, D. Schlutter, Geochim. Cosomochim. Acta66, 2929 (2002).
28
H. Cerutti, thesis, Univ. of Bern (1974).
29
A. O. Nier, Phys. Rev.77, 789 (1950).
30
We acknowledge the support of the entire Genesis team in enabling this work. Portions of this work at Washington Univ. were supported by NASA grants (NNJ04HI17G and NAG5-12885).
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Science
Volume 318 | Issue 5849
19 October 2007
19 October 2007
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American Association for the Advancement of Science.
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Received: 22 May 2007
Accepted: 31 August 2007
Published in print: 19 October 2007
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