Cryogenic flow features on Ceres: Implications for crater-related cryovolcanism

K. Krohn, R. Jaumann, K. Stephan, K. A. Otto, N. Schmedemann, R. J. Wagner, K. D. Matz, F. Tosi, F. Zambon, I. von der Gathen, F. Schulzeck, S. E. Schröder, D. L. Buczkowski, H. Hiesinger, H. Y. McSween, C. M. Pieters, F. Preusker, T. Roatsch, C. A. Raymond, C. T. RussellDavid Williams

Research output: Contribution to journalArticle

37 Scopus citations

Abstract

Craters on Ceres, such as Haulani, Kupalo, Ikapati, and Occator show postimpact modification by the deposition of extended plains material with pits, multiple lobate flows, and widely dispersed deposits that form a diffuse veneer on the preexisting surface. Bright material units in these features have a negative spectral slope in the visible range, making it appear bluish with respect to the grey-toned overall surface of Ceres. We calculate the drop height-to-runout length ratio of several flow features and obtain a coefficient of friction of < 0.1: The results imply higher flow efficiency for flow features on Ceres than for similar features on other planetary bodies with similar gravity, suggesting low-viscosity material. The special association of flow features with impact craters could either point to an impact melt origin or to an exogenic triggering of cryovolcanic processes.

Original languageEnglish (US)
Pages (from-to)11,994-12,003
JournalGeophysical Research Letters
Volume43
Issue number23
DOIs
StatePublished - Dec 16 2016

Keywords

  • coefficient of friction
  • cryovolcanism
  • dwarf planet Ceres
  • flow features
  • impact melt
  • subsurface materials

ASJC Scopus subject areas

  • Geophysics
  • Earth and Planetary Sciences(all)

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    Krohn, K., Jaumann, R., Stephan, K., Otto, K. A., Schmedemann, N., Wagner, R. J., Matz, K. D., Tosi, F., Zambon, F., von der Gathen, I., Schulzeck, F., Schröder, S. E., Buczkowski, D. L., Hiesinger, H., McSween, H. Y., Pieters, C. M., Preusker, F., Roatsch, T., Raymond, C. A., ... Williams, D. (2016). Cryogenic flow features on Ceres: Implications for crater-related cryovolcanism. Geophysical Research Letters, 43(23), 11,994-12,003. https://doi.org/10.1002/2016GL070370