Isotopic composition of xenon and krypton in micro- and macroinclusions in iron meteorites

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Cosmochemistry, Iron Meteorites, Krypton Isotopes, Meteoritic Composition, Xenon Isotopes, Chemical Fractionation, Odessa Meteorite, Primitive Earth Atmosphere, Schreibersite, Sikhote-Alin Meteorite, Solar System, Troilite

Scientific paper

An analysis is presented of the isotopic composition of xenon and krypton from macroinclusions (schreibersite, troilite) and microinclusions in the Sikhote-Alin, Odessa, Canyon Diablo, and Campo del Cielo iron meteorites. Two basic types of xenon were observed; spallogene xenon enriched in light isotopes; and captured xenon similar in isotopy to xenon in the earth's atmosphere but which has fewer light isotopes (schreibersite, magnetic acid-insoluble residues). Similar xenon is also contained in several mineral phases of ordinary and carbonaceous chondrites and appears to be the product of isotope mass-fractionation in the early stages of the evolution of matter in the solar system.

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