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Oxo Crater on (1) Ceres: Geological History and the Role of Water-ice

Nathues, A. and Platz, Thomas and Hoffmann, M. and Thangjam, G. and Cloutis, E. and Applin, D.M. and Le Corre, L. and Reddy, V. and Mengel, K. and Protopapa, S. and Takir, D. and Preusker, Frank and Schmidt, Britney E. and Russell, C.T. (2017) Oxo Crater on (1) Ceres: Geological History and the Role of Water-ice. Astronomical Journal, 154 (3). American Astronomical Society. DOI: 10.3847/1538-3881/aa7a04 ISSN 0004-6256

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Official URL: http://iopscience.iop.org/article/10.3847/1538-3881/aa7a04/meta;jsessionid=D62832873108F91FE9E9FB89FA325C46.c4.iopscience.cld.iop.org

Abstract

Dwarf planet Ceres (empty set similar to 940 km) is the largest object in the main asteroid belt. Investigations suggest that Ceres is a thermally evolved, volatile-rich body with potential geological activity, a body that was never completely molten, but one that possibly partially differentiated into a rocky core and an ice-rich mantle, and may contain remnant internal liquid water. Thermal alteration and the infall of exogenic material contribute to producing a (dark) carbonaceous chondritic-like surface containing ammoniated phyllosilicates. Here we report imaging and spectroscopic analyses of data on the bright Oxo crater derived from the Framing Camera and the Visible and Infrared Spectrometer on board the Dawn spacecraft. We confirm that the transitional complex crater Oxo (empty set similar to 9 km) exhibits exposed surface water-ice. We show that this water-ice-rich material is associated exclusively with two lobate deposits at pole-facing scarps, deposits that also contain carbonates and admixed phyllosilicates. Due to Oxo's location at -4802 m below the cerean reference ellipsoid and its very young age of only 190 ka (1 sigma: +100 ka, -70 ka), Oxo is predestined for ongoing water-ice sublimation.

Item URL in elib:https://elib.dlr.de/115204/
Document Type:Article
Title:Oxo Crater on (1) Ceres: Geological History and the Role of Water-ice
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Nathues, A.max-planck institute for solar system research, katlenburg-lindau, germanyUNSPECIFIED
Platz, Thomasmax planck institut für sonnensystemforschungUNSPECIFIED
Hoffmann, M.max planck institute for solar system research , katlenburg-lindau, germanyUNSPECIFIED
Thangjam, G.max planck institute for solar system research, justus - von - liebig - weg 3, d - 37077 göttingen, germanyUNSPECIFIED
Cloutis, E.university of winnipeg, winnipeg, canadaUNSPECIFIED
Applin, D.M.university of winnipeg, winnipeg, canadaUNSPECIFIED
Le Corre, L.max planck institute for solar system research, max-planck-str. 2, katlenburg-lindau, 37191, germanyUNSPECIFIED
Reddy, V.max planck institute for solar system research , katlenburg-lindau, germanyUNSPECIFIED
Mengel, K.Tech Univ Clausthal, IELF, Adolph Roemer Str 2A, D-38678 Clausthal Zellerfeld, GermanyUNSPECIFIED
Protopapa, S.u. of marylandUNSPECIFIED
Takir, D.SETI Inst, Mountain View, CA 94043 USAUNSPECIFIED
Preusker, Frankfrank.preusker (at) dlr.deUNSPECIFIED
Schmidt, Britney E.georgia institute of technologyUNSPECIFIED
Russell, C.T.institute of geophysics, university of california, los angeles, los angeles, ca 90095UNSPECIFIED
Date:September 2017
Journal or Publication Title:Astronomical Journal
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:154
DOI :10.3847/1538-3881/aa7a04
Publisher:American Astronomical Society
ISSN:0004-6256
Status:Published
Keywords:Oxo, Crater, Ceres, Topography
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 > Planetary Geodesy
Deposited By: Scholten, Dipl.-Ing. Frank
Deposited On:13 Nov 2017 10:25
Last Modified:31 Jul 2019 20:12

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