Creation and Evolution of Impact-generated Reduced Atmospheres of Early Earth

@article{Zahnle2019CreationAE,
  title={Creation and Evolution of Impact-generated Reduced Atmospheres of Early Earth},
  author={Kevin J. Zahnle and Roxana E. Lupu and David C. Catling and Nicholas Wogan},
  journal={arXiv: Earth and Planetary Astrophysics},
  year={2019}
}
  • K. Zahnle, R. Lupu, +1 author N. Wogan
  • Published 31 December 2019
  • Physics, Environmental Science
  • arXiv: Earth and Planetary Astrophysics
The origin of life on Earth seems to demand a highly reduced early atmosphere, rich in CH4, H2, and NH3, but geological evidence suggests that Earth's mantle has always been relatively oxidized and its emissions dominated by CO2 H2O, and N2. The paradox can be resolved by exploiting the reducing power inherent in the "late veneer," i.e., material accreted by Earth after the Moon-forming impact. Isotopic evidence indicates that the late veneer consisted of extremely dry, highly reduced inner… 
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