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

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 Zusammenfassung: 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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Sprache(n): eng - English
 Datum: 2019-03-192019
 Publikationsstatus: Erschienen
 Seiten: -
 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: Expertenbegutachtung
 Identifikatoren: DOI: 10.1016/j.icarus.2018.01.022
 Art des Abschluß: -

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Titel: Icarus
Genre der Quelle: Zeitschrift
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Ort, Verlag, Ausgabe: Amsterdam : Academic Press
Seiten: - Band / Heft: 320 Artikelnummer: - Start- / Endseite: 39 - 48 Identifikator: ISSN: 0019-1035
CoNE: https://pure.mpg.de/cone/journals/resource/954922645023