Noble Gases in the Fayetteville Meteorite
Noble gases were extracted from the dark portions of Fayetteville by heating the sample to successively higher temperatures up to 1600°C. Analyses of the neon evolved at each temperature indicate that this gas is a mixture of at least three components. It is shown that the isotopic composition of neon observed could be produced from a mixture of primordial neon, cosmogenic neon, and highly mass-fractionated primordial neon. The isotopic composition of helium, neon and argon indicate a primordial component for which He3:He4 ≤ 0.00031, Ar38:Ar36 ≤ 0.177, Ne20:Ne22 ≥ 12.6, and Ne21:Ne22 ≥ 0.033. The xenon spectra show an excess of the heavy xenon isotopes with a mass yield curve intermediate between that observed in Pasamonte and that in the earth's atmosphere. It is shown that this atmosphere-like xenon component is not due to contamination but is definitely a component of meteoritic xenon.
O. Manuel, "Noble Gases in the Fayetteville Meteorite," Geochimica et Cosmochimica Acta, vol. 31, pp. 2413-2431, Elsevier Limited, Dec 1967.
The definitive version is available at http://dx.doi.org/10.1016/0016-7037(67)90012-9
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