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McKeegan, K. D.; Kallio, A. P. A.; Heber, V. S.; Jarzebinski, G.; Mao, P. H.; Coath, C. D.; Kunihiro, T.; Wiens, R. C.; Nordholt, J. E.; Moses, R. W.; Reisenfeld, D. B.; Jurewicz, A. J. G.; Burnett, D. S.
Science (American Association for the Advancement of Science), 06/2011, Letnik: 332, Številka: 6037Journal Article
All planetary materials sampled thus far vary in their relative abundance of the major isotope of oxygen, 16 O, such that it has not been possible to define a primordial solar system composition. We measured the oxygen isotopic composition of solar wind captured and returned to Earth by NASA's Genesis mission. Our results demonstrate that the Sun is highly enriched in 16 O relative to the Earth, Moon, Mars, and bulk meteorites. Because the solar photosphere preserves the average isotopic composition of the solar system for elements heavier than lithium, we conclude that essentially all rocky materials in the inner solar system were enriched in 17 O and 18 O, relative to 16 O, by ∼7%, probably via non—mass-dependent chemistry before accretion of the first planetesimals.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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Vir: Osebne bibliografije
in: SICRIS
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