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Bright carbonate surfaces on Ceres as remnants of salt-rich water fountains

Ruesch, O. and Quick, L.C. and Landis, M. E. and Sori, Michael M. and Cadek, O. and Broz, Petr and Otto, Katharina A. and Bland, M. T. and Byrne, Shane and Castillo-Rogez, J.C. and Hiesinger, H. and Jaumann, R. and Krohn, Katrin and McFadden, L.A. and Nathues, A. and Neesemann, A. and Preusker, Frank and Roatsch, Thomas and Schenk, P. and Scully, J.E.C. and Sykes, Mark V. and Williams, D.A. and Raymond, C.A. and Russell, C.T. (2018) Bright carbonate surfaces on Ceres as remnants of salt-rich water fountains. Icarus. Elsevier. DOI: 10.1016/j.icarus.2018.01.022 ISSN 0019-1035

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Official URL: https://doi.org/10.1016/j.icarus.2018.01.022


Vinalia and Cerealia Faculae are bright and salt-rich localized areas in Occator crater on Ceres. The predominance of the near-infrared signature of sodium carbonate on these surfaces suggests their original material was a brine. Here we analyze Dawn Framing Camera's images and characterize the surfaces as composed of a central structure, either a possible depression (Vinalia) or a central dome (Cerealia), and a discontinuous mantling. We consider three materials enabling the ascent and formation of the faculae: ice ascent with sublimation and carbonate particle lofting, pure gas emission entraining carbonate particles, and brine extrusion. We find that a mechanism explaining the entire range of morphologies, topographies, as well as the common composition of the deposits is brine fountaining. This process consists of briny liquid extrusion, followed by flash freezing of carbonate and ice particles, particle fallback, and sublimation. Subsequent increase in briny liquid viscosity leads to doming. Dawn observations did not detect currently active water plumes, indicating the frequency of such extrusions is longer than years.

Item URL in elib:https://elib.dlr.de/120398/
Document Type:Article
Title:Bright carbonate surfaces on Ceres as remnants of salt-rich water fountains
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Ruesch, O.NASA Goddard Space Flight CenterUNSPECIFIED
Quick, L.C.planetary science institute, tucson, az, usaUNSPECIFIED
Landis, M. E.lunar and planetary laboratory, university of arizona, tucson, az, usaUNSPECIFIED
Sori, Michael M.Lunar and Planetary Laboratory, University of Arizona, Tucson, AZ 85721, USAUNSPECIFIED
Cadek, O.Charles University in Prague, Prague, Czech RepublicUNSPECIFIED
Broz, PetrInstitute of Geophysics, ASCR, Prague, Czech RepublicUNSPECIFIED
Otto, Katharina A.Katharina.Otto (at) dlr.dehttps://orcid.org/0000-0002-0675-1177
Bland, M. T.USGS Astrogeology Science CenterUNSPECIFIED
Byrne, ShaneLunar and Planetary Laboratory, University of Arizona, Tucson, AZ, USAUNSPECIFIED
Castillo-Rogez, J.C.jet propulsion laboratory, california institute of technology,UNSPECIFIED
Hiesinger, H.Institut für Planetologie, Westfälische Wilhelms-Universität, Münster, GermanyUNSPECIFIED
Jaumann, R.ralf.jaumann (at) dlr.deUNSPECIFIED
Krohn, Katrinkatrin.krohn (at) dlr.dehttps://orcid.org/0000-0001-8518-4985
McFadden, L.A.University of Maryland, College ParkUNSPECIFIED
Nathues, A.Max-Planck Institute for Solar System Research, Katlenburg-Lindau, GermanyUNSPECIFIED
Neesemann, A.Free University of Berlin, Berlin, GermanyUNSPECIFIED
Preusker, Frankfrank.preusker (at) dlr.deUNSPECIFIED
Roatsch, Thomasthomas.roatsch (at) dlr.deUNSPECIFIED
Schenk, P.Lunar and Planetary Institute, 3600 Bay Area Blvd, Houston TX 77058, USAUNSPECIFIED
Scully, J.E.C.NASA JPL, California Institute of Technology, Pasadena, CaliforniaUNSPECIFIED
Sykes, Mark V.Planetary Science Institute, Tucson, AZ, United States.UNSPECIFIED
Williams, D.A.Department of Geology, Arizona State University, Tempe, AZ, USAUNSPECIFIED
Raymond, C.A.Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109-8099, USAUNSPECIFIED
Russell, C.T.Institute of Geophysics, University of California, Los Angeles, Los Angeles, CA 90095UNSPECIFIED
Journal or Publication Title:Icarus
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
DOI :10.1016/j.icarus.2018.01.022
Series Name:Elsevier
Keywords:CERES, water, carbonate
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Science and Exploration
DLR - Research area:Raumfahrt
DLR - Program:R EW - Erforschung des Weltraums
DLR - Research theme (Project):R - Projekt DAWN
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Asteroids and Comets
Institute of Planetary Research > Planetary Geology
Institute of Planetary Research > Planetary Geodesy
Deposited By: Stiebeler, Ulrike
Deposited On:26 Nov 2018 16:03
Last Modified:06 Sep 2019 15:26

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