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Evidence for Unfractionated Magnesium Isotopes in Genesis SOS Wafers

Humayun, M. and Jurewicz, A. J. G. and Olinger, C. and Burnett, D. S. (2012) Evidence for Unfractionated Magnesium Isotopes in Genesis SOS Wafers. Meteoritics and Planetary Science, 47 (S1). A202-A202. ISSN 1086-9379. doi:10.1111/j.1945-5100.2012.01401_2.x.

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Oxygen isotopes measured by MegaSIMS on Genesis Concentrator samples indicate a solar wind (SW) oxygen isotope composition that is related to the ^(16)O-enriched CAI composition by a large mass dependent fractionation [I]. Isotope fractionation during acceleration of the solar wind is expected to create such a large mass fractionation, but a direct test of the presence of mass fractionation in the solar wind has not been possible with sufficient precision. Unlike O and Ne, Mg isotopes are sufficiently uniform in chondrites, terrestrial samples, and other meteoritic and planetary materials from the inner solar system [2], and so offer the best opportunity for a precise (±1‰) test of the Coulomb Drag mechanism for solar wind isotope fractionation.

Item Type:Article
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URLURL TypeDescription
Humayun, M.0000-0002-5830-5208
Jurewicz, A. J. G.0000-0002-3282-5782
Burnett, D. S.0000-0001-9521-8675
Additional Information:© 2012 Meteoritical Society. Issue published online: 6 Aug 2012. Article first published online: 8 Aug 2012.
Issue or Number:S1
Record Number:CaltechAUTHORS:20121002-155323510
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Official Citation:The 75th Annual Meeting of the Meteoritical Society Cairns, Australia, 12-17 August, 2012. Meteoritics & Planetary Science, 47: A35–A436. doi: 10.1111/j.1945-5100.2012.01401_2.x
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:34645
Deposited By: Ruth Sustaita
Deposited On:03 Oct 2012 14:40
Last Modified:09 Nov 2021 23:09

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