Composition of the noble gases in Canyon Diablo.

Downing, R. G.; Manuel, Oliver

doi:10.2343/geochemj.16.157

Cited by 3 publications

(1 citation statement)

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“…(Fe, Z = 26): Deep in the SN debris, iron meteorites and the cores of the terrestrial planets formed. Iron meteorites trapped "normal" Xe, like that on Earth [47]. The University of Tokyo [48], Harvard [49] and Cal Tech [50] have new data showing that iron meteorites did not form by the extraction of iron from an interstellar cloud.…”

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confidence: 99%

The Sun is a plasma diffuser that sorts atoms by mass

2006

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The Sun is a plasma diffuser that selectively moves light elements like H and He and the lighter isotopes of each element to its surface. The Sun formed on the collapsed core of a supernova (SN) and is composed mostly of elements made near the SN core (Fe, O, Ni, Si, and S), like the rocky planets and ordinary meteorites.Neutron-emission from the central neutron star triggers a series of reactions that generate solar luminosity, solar neutrinos, solar mass-fractionation, and an outpouring of hydrogen in the solar wind. Mass fractionation seems to have operated in the parent star, and likely occurs in other stars as well.

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confidence: 99%

The Sun is a plasma diffuser that sorts atoms by mass

2006

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Origin of Elements in the Solar System

Manuel

2002

Origin of Elements in the Solar System

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Abundance and isotopic composition of noble gases in metal and graphite of the Bohumilitz IAB iron meteorite

Maruoka

Matsuda

Kurat

2001

Meteorit & Planetary Scien

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Abstract-Abundances and isotopic compositions of noble gases in metal and graphite of the Bohumilitz IAB iron meteorite were measured. The abundance ratios of spallogenic components in metal reveal a 3He deficiency which is due to the difhsive loss of parent isotopes, that is, tritium (Tilles, 1963;Schultz, 1967). The diffusive loss likely has been induced by thermal heating by the Sun during cosmic-ray exposure (-1 60 Ma; Lavielle et al., 1999). Thermal process such as impact-induced partial loss may have affected the isotopic composition of spallogenic Ne. The 129Xe/l31Xe ratio of cosmogenic components in the metal indicates an enhanced production of epi-thermal neutrons.The abundance ratios of spallogenic components in the graphite reveal that it contained small amounts of metal and silicates. The isotopic composition of heavy noble gases in graphite itself was obtained from graphite treated with HF/HCl. The isotopic composition of the etched graphite shows that it contains two types of primordial Xe (i.e., Q-Xe and El Taco Xe). The isotopic heterogeneity preserved in the Bohumilitz graphite indicates that the Bohumilitz graphite did not experience any high-temperature event and, consequently, must have been emplaced into the metal at subsolidus temperatures. This situation is incompatible with an igneous model as well as the impact melting models for the IAB-IIICD iron meteorites as proposed by Choi et al. (1995) and Wasson et al. (1980).

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Composition of the noble gases in Canyon Diablo.

Cited by 3 publications

References 61 publications

The Sun is a plasma diffuser that sorts atoms by mass

The Sun is a plasma diffuser that sorts atoms by mass

Origin of Elements in the Solar System

Abundance and isotopic composition of noble gases in metal and graphite of the Bohumilitz IAB iron meteorite

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