Geology of Ceres’ North Pole quadrangle with Dawn FC imaging data

Ottaviano Ruesch, Lucy A. McFadden, David Williams, Kynan H.G. Hughson, Jan Hendrik Pasckert, Jennifer Scully, Thomas Kneissl, Thomas Roatsch, Andrea Naß, Frank Preusker, Nico Schmedemann, Simone Marchi, Harald Hiesinger, Ralf Jaumann, Andreas Nathues, Carol A. Raymond, Christopher T. Russell

Research output: Contribution to journalArticle

2 Scopus citations

Abstract

The Dawn Framing Camera repeatedly imaged Ceres’ North Pole quadrangle (Ac-1 Asari, latitudes >66°N) at a resolution of ∼35 m/pixel through a panchromatic filter, enabling the derivation of a digital terrain model (DTM) and an ortho-rectified mosaic. Using this dataset, a photo-geologic map and stratigraphy, complemented with absolute model ages of impact craters, were produced. We identified the following key surface features: an ancient 4.5 km high isolated dome with a non-impact origin; recent lobate materials on crater interiors possibly formed as high-speed flows of collapsed rim material; and recent bright areas in permanently shadowed regions (PSRs), which we interpret as ice accumulation mostly by infall of exogenic material. Crater morphologies and dimensions do not differ from those in other quadrangles, suggesting the widespread influence of a rheologically weak target during the crater formation process. There is a paucity of lobate materials associated with impact cratering, in contrast to previous identifications with lower spatial resolution imagery.

Original languageEnglish (US)
Pages (from-to)14-27
Number of pages14
JournalIcarus
Volume316
DOIs
StatePublished - Dec 2018

Keywords

  • Asteroid Ceres
  • Geological processes
  • Impact processes

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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    Ruesch, O., McFadden, L. A., Williams, D., Hughson, K. H. G., Pasckert, J. H., Scully, J., Kneissl, T., Roatsch, T., Naß, A., Preusker, F., Schmedemann, N., Marchi, S., Hiesinger, H., Jaumann, R., Nathues, A., Raymond, C. A., & Russell, C. T. (2018). Geology of Ceres’ North Pole quadrangle with Dawn FC imaging data. Icarus, 316, 14-27. https://doi.org/10.1016/j.icarus.2017.09.036