Possible cometary origin of heavy noble gases in the atmospheres of Venus, Earth and Mars

@article{Owen1992PossibleCO,
  title={Possible cometary origin of heavy noble gases in the atmospheres of Venus, Earth and Mars},
  author={T. Owen and A. Bar-Nun and I. Kleinfeld},
  journal={Nature},
  year={1992},
  volume={358},
  pages={43-46}
}
MODELS that trace the origin of noble gases in the atmospheres of the terrestrial planets (Venus, Earth and Mars) to the 'planetary component' in chondritic meteorites confront several problems. The 'missing' xenon in the atmospheres of Mars and Earth (Fig. 1) is one of the most obvious; this gas is not hidden or trapped in surface materials1. On Venus, the absolute abundances of neon and argon per gram of rock are higher even than those in carbonaceous chondrites, whereas the relative… Expand
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