title: Cryovolcanism on Ceres.
abstract: Volcanic edifices are abundant on rocky bodies of the inner solar system. In the cold outer solar system, volcanism can occur on solid bodies with a water-ice shell, but derived cryovolcanic constructs have proved elusive. We report the discovery, using Dawn Framing Camera images, of a landform on dwarf planet Ceres that we argue represents a viscous cryovolcanic dome. Parent material of the cryomagma is a mixture of secondary minerals, including salts and water ice. Absolute model ages from impact craters reveal that extrusion of the dome has occurred recently. Ceres' evolution must have been able to sustain recent interior activity and associated surface expressions. We propose salts with low eutectic temperatures and thermal conductivities as key drivers for Ceres' long-term internal evolution.
authors.affiliation: NASA Goddard Space Flight Center/Universities Space Research Association (USRA), Greenbelt, MD, USA. ottaviano.ruesch@nasa.gov.
authors.forename: O
authors.initials: O
authors.lastname: Ruesch
authors.affiliation: Max Planck Institute for Solar System Research, Göttingen, Germany.
authors.forename: T
authors.initials: T
authors.lastname: Platz
authors.affiliation: Lunar and Planetary Science Institute, Houston, TX, USA.
authors.forename: P
authors.initials: P
authors.lastname: Schenk
authors.affiliation: NASA Goddard Space Flight Center, Greenbelt, MD, USA.
authors.forename: L A
authors.initials: LA
authors.lastname: McFadden
authors.affiliation: Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, USA.
authors.forename: J C
authors.initials: JC
authors.lastname: Castillo-Rogez
authors.affiliation: Planetary Science Institute, Tucson, AZ, USA.
authors.forename: L C
authors.initials: LC
authors.lastname: Quick
authors.affiliation: Lunar and Planetary Laboratory, University of Arizona, Tucson, AZ, USA.
authors.forename: S
authors.initials: S
authors.lastname: Byrne
authors.affiliation: German Aerospace Center (DLR), Berlin, Germany.
authors.forename: F
authors.initials: F
authors.lastname: Preusker
authors.affiliation: Planetary Science Institute, Tucson, AZ, USA.
authors.forename: D P
authors.initials: DP
authors.lastname: O'Brien
authors.affiliation: Institute of Geosciences, Freie Universität Berlin, Berlin, Germany.
authors.forename: N
authors.initials: N
authors.lastname: Schmedemann
authors.affiliation: School of Earth and Space Exploration, Arizona State University, Tempe, AZ, USA.
authors.forename: D A
authors.initials: DA
authors.lastname: Williams
authors.affiliation: Planetary Science Institute, Tucson, AZ, USA.
authors.forename: J-Y
authors.initials: JY
authors.lastname: Li
authors.affiliation: U.S. Geological Survey, Astrogeology Science Center, Flagstaff, AZ, USA.
authors.forename: M T
authors.initials: MT
authors.lastname: Bland
authors.affiliation: Institut für Planetologie, Westfälische Wilhelms-Universität, Münster, Germany.
authors.forename: H
authors.initials: H
authors.lastname: Hiesinger
authors.affiliation: Institute of Geosciences, Freie Universität Berlin, Berlin, Germany.
authors.forename: T
authors.initials: T
authors.lastname: Kneissl
authors.affiliation: Institute of Geosciences, Freie Universität Berlin, Berlin, Germany.
authors.forename: A
authors.initials: A
authors.lastname: Neesemann
authors.affiliation: Max Planck Institute for Solar System Research, Göttingen, Germany.
authors.forename: M
authors.initials: M
authors.lastname: Schaefer
authors.affiliation: Institut für Planetologie, Westfälische Wilhelms-Universität, Münster, Germany.
authors.forename: J H
authors.initials: JH
authors.lastname: Pasckert
authors.affiliation: Georgia Institute of Technology, Atlanta, GA, USA.
authors.forename: B E
authors.initials: BE
authors.lastname: Schmidt
authors.affiliation: Johns Hopkins Applied Physics Laboratory, Laurel, MD, USA.
authors.forename: D L
authors.initials: DL
authors.lastname: Buczkowski
authors.affiliation: Planetary Science Institute, Tucson, AZ, USA.
authors.forename: M V
authors.initials: MV
authors.lastname: Sykes
authors.affiliation: Max Planck Institute for Solar System Research, Göttingen, Germany.
authors.forename: A
authors.initials: A
authors.lastname: Nathues
authors.affiliation: German Aerospace Center (DLR), Berlin, Germany.
authors.forename: T
authors.initials: T
authors.lastname: Roatsch
authors.affiliation: Max Planck Institute for Solar System Research, Göttingen, Germany.
authors.forename: M
authors.initials: M
authors.lastname: Hoffmann
authors.affiliation: Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, USA.
authors.forename: C A
authors.initials: CA
authors.lastname: Raymond
authors.affiliation: Department of Earth and Space Sciences, University of California, Los Angeles, CA, USA.
authors.forename: C T
authors.initials: CT
authors.lastname: Russell