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

Ruesch, O., Quick, L., Landis, M., Sori, M., Čadek, O., Brož, P., et al. (2019). Bright carbonate surfaces on Ceres as remnants of salt-rich water fountains. Icarus, 320, 39-48. doi:10.1016/j.icarus.2018.01.022.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0003-31F9-D Version Permalink: http://hdl.handle.net/21.11116/0000-0003-31FA-C
Genre: Journal Article

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 Creators:
Ruesch, O., Author
Quick, L.C., Author
Landis, M.E., Author
Sori, M.M., Author
Čadek, O., Author
Brož, P., Author
Otto, K.A., Author
Bland, M.T., Author
Byrne, S., Author
Castillo-Rogez, J.C., Author
Hiesinger, H., Author
Jaumann, R., Author
Krohn, K., Author
McFadden, L.A., Author
Nathues, Andreas1, Author              
Neesemann, A., Author
Preusker, F., Author
Roatsch, T., Author
Schenk, P.M., Author
Scully, J.E.C., Author
Sykes, M.V., AuthorWilliams, D.A., AuthorC.A.Raymond, AuthorC.T.Russell, Author more..
Affiliations:
1Department Planets and Comets, Max Planck Institute for Solar System Research, Max Planck Society, ou_1832288              

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 Abstract: 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.

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Language(s): eng - English
 Dates: 2019-03-192019
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.1016/j.icarus.2018.01.022
 Degree: -

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Title: Icarus
Source Genre: Journal
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Publ. Info: Amsterdam : Academic Press
Pages: - Volume / Issue: 320 Sequence Number: - Start / End Page: 39 - 48 Identifier: ISSN: 0019-1035
CoNE: /journals/resource/954922645023