Formation Conditions of Enceladus and Origin of Its Methane Reservoir

  title={Formation Conditions of Enceladus and Origin of Its Methane Reservoir},
  author={Olivier Mousis and Jonathan I. Lunine and Jack Hunter Waite and Brian Magee and William S. Lewis and Kathleen E Mandt and D. Marquer and Daniel Cordier},
We describe a formation scenario of Enceladus constrained by the deuterium-to-hydrogen ratio (D/H) in the gas plumes as measured by the Cassini Ion and Neutral Mass Spectrometer. We propose that, similarly to Titan, Enceladus formed from icy planetesimals that were partly devolatilized during their migration within the Kronian subnebula. In our scenario, at least primordial Ar, CO, and N2 were devolatilized from planetesimals during their drift within the subnebula, due to the increasing… CONTINUE READING

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