Chemically fractionated fission xenon (CFF-Xe) on the earth and in meteorites

Meshik, A. P.; Shukolyukov, Y.A.; Jeßberger, E. K.

doi:10.1063/1.47346

Cited by 3 publications

(3 citation statements)

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“…1) show a close correlation between cally distinct Xe (1). Large anomalies have ous) and 'j5U (neutron-induced) disinte-the excesses in lZ9Xe and fission product been found for meteorites, and the I-Xe gration products (7). This interpretation 136Xe (slope: 3.125 2 0.084) that is consystem is an established tool that can be implies that the lZ9Xe excesses observed in sistent with earlier results (slope: 3.01 2 used to study age differences during the first mantle-related samples are meaningless for 0.10) (13).…”

mentioning

confidence: 86%

“…Thus. we collected cells from natural sites where they are abundant, including the water colulnn of Salt Pond, Woods Hole, Massachusetts, and the water and sediments of shallow salt-marsh pools in the Parker River Wildlife Refuge, R o n - (7). Both rodshaped magnetotactic bacteria and the MMP containing Fe sulfide crystals were present in the sediments and water samples collected from these sites (Fig.…”

Section: Reaction Sequence Of Iron Sulfide Minerals In Bacteria and Tmentioning

confidence: 98%

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Plutonium-Fission Xenon Found in Earth's Mantle

Kunz

Staudacher

Allègre

1998

Science

129

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Data from mid-ocean ridge basalt glasses indicate that the short-lived radionuclide plutonium-244 that was present during an early stage of the development of the solar system is responsible for roughly 30 percent of the fissiogenic xenon excesses in the interior of Earth today. The rest of the fissiogenic xenon can be ascribed to the spontaneous fission of still live uranium-238. This result, in combination with the refined determination of xenon-129 excesses from extinct iodine-129, implies that the accretion of Earth was finished roughly 50 million to 70 million years after solar system formation and that the atmosphere was formed by mantle degassing.

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mentioning

confidence: 86%

Section: Reaction Sequence Of Iron Sulfide Minerals In Bacteria and Tmentioning

confidence: 98%

Plutonium-Fission Xenon Found in Earth's Mantle

Kunz

Staudacher

Allègre

1998

Science

129

View full text Add to dashboard Cite

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“…This results in an isotopic composition which depends on the half-lives and the chemical properties of the fission fragments. CFF Xe has been identified in U-free inclusions of samples from the natural reactor in Okelobondo, in the southern extension of the Oklo deposit (Meshik et al 1997). It is characterized by large excesses on 132Xe (as well as excesses on 129'131Xe) which results in a pattern that cannot be produced by total yields in known fission reactions.…”

Section: Other Proposed Componentsmentioning

confidence: 99%

Noble gas components in planetary atmospheres and interiors in relation to solar wind and meteorites

Marti

Mathew

1998

Proc. Indian Acad. Sci. (Earth Planet Sci.)

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We discuss observed xenon isotopic signatures in solar system reservoirs and possible relationships. The predominant trapped xenon component in ordinary chondrites (OC) is OC-Xe and its isotopic signature differs from Xe in ureilites, in carbonaceous chondrites, in the atmospheres of Earth and Mars, and in the solar wind. Additional minor Xe components were identified in type 3 chondrites and in the metal phase of chondrites. The OC-Xe and ureilite signatures are both consistent with varying mixtures of HL-Xe and slightly mass fractionated solar-type Xe. Xenon in the Martian atmosphere is found to be strongly mass fractionated by 37.7~oo per amu, relative to solar Xe, favoring the heavy isotopes. Xenon in SNC's from the Martian mantle show admixture of solar-type Xe, which belongs to an elementally strongly fractionated component. The origin of the isotopic signatures of Ne and Xe in the terrestrial atmosphere are discussed in the light of evidence that the Xe isotopic fractionations in the Martian and terrestrial atmospheres are consistent. However, in the terrestrial atmospheric Xe component excesses are observed for 132Xe and also for 129'131Xe, relative to fractionated solar Xe. The suggested chemically fractionated fission Xe component (CFF-Xe) seems to closely match the above excesses. We discuss models of origin for planetary volatiles and possible processes driving their evolution to present day compositions.

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The young age of Earth

Zhang

1998

Geochimica et Cosmochimica Acta

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Chemically fractionated fission xenon (CFF-Xe) on the earth and in meteorites

Cited by 3 publications

References 1 publication

Plutonium-Fission Xenon Found in Earth's Mantle

Plutonium-Fission Xenon Found in Earth's Mantle

Noble gas components in planetary atmospheres and interiors in relation to solar wind and meteorites

The young age of Earth

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