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The geology of the Kerwan quadrangle of dwarf planet Ceres: Investigating Ceres’ oldest, largest impact basin

Williams, D.A. and Kneissl, T. and Neesemann, Adrian and Mest, S. and Palomba, E. and Platz, Thomas and Nathues, A. and Longobardo, A and Scully, J.E.C. and Ermakov, Anton and Jaumann, Ralf and Buczkowski, D.L. and Schäfer, M. and Thangjam, G. S. and Pieters, C.M. and Roatsch, Thomas and Preusker, Frank and Marchi, S and Schmedemann, N. and Hiesinger, H. and Frigeri, A. and Raymond, C.A. and Russell, C.T. (2018) The geology of the Kerwan quadrangle of dwarf planet Ceres: Investigating Ceres’ oldest, largest impact basin. Icarus, 316, pp. 99-113. Elsevier. DOI: 10.1016/j.icarus.2017.08.015 ISSN 0019-1035

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Official URL: https://www.sciencedirect.com/science/article/abs/pii/S0019103516305632

Abstract

We conducted a geologic mapping investigation of Dawn spacecraft data to determine the geologic history of the Kerwan impact basin region of dwarf planet Ceres, which is mostly located in the Ac-7 Kerwan Quadrangle. Geological mapping was applied to Dawn Framing Camera images from the Low Altitude Mapping Orbit (LAMO, 35 m/pixel) and supplemented by digital terrain models and color images from the High Altitude Mapping Orbit (HAMO, 135 m/pixel), as well as preliminary Visible and Infrared Spectrometer (VIR) and gravity data. The 284-km diameter Kerwan impact basin is the oldest unequivocal impact crater on Ceres, and has a highly discontinuous, polygonal, degraded rim and contains a ‘smooth’ unit that both fills the basin floor and surrounds the degraded rim to the west, south, and east. Although there are some subtle topographic features in the Kerwan basin that could be interpreted as flow boundaries, there is no indisputable evidence of cryovolcanic features in or around the basin (however if such features existed they could be buried). Nevertheless, all data point to impact-induced melting of a cerean crust enriched in a volatile, likely water ice, to produce the Kerwan smooth material. Subsequent geologic activity in this region includes emplacement of impact craters such as Dantu, which produced a variety of colorful deposits, and rayed craters such as Rao and Cacaguat. Based on the crater size-frequency distribution absolute model ages of the Kerwan smooth material in and around the basin, marking a minimum age for the Kerwan basin, our mapping defines this as the oldest boundary within the cerean geologic timescale, separating the Pre-Kerwanan and Kerwanan Periods at > 1.3 Ga (Lunar-derived chronology model) or > 230–850 Ma (Asteroid-derived chronology model, depending on strength of target material).

Item URL in elib:https://elib.dlr.de/125188/
Document Type:Article
Title:The geology of the Kerwan quadrangle of dwarf planet Ceres: Investigating Ceres’ oldest, largest impact basin
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Williams, D.A.Arizona State UniversityUNSPECIFIED
Kneissl, T.Freie Universität Berlin, Inst. of Geosciences, Planetology and Remote SensingUNSPECIFIED
Neesemann, AdrianFU BerlinUNSPECIFIED
Mest, S.Planetary Science Institute, 1700 E. Ft. Lowell, Suite 106, Tucson, AZ, 85719, USAUNSPECIFIED
Palomba, E.Institute for Interplanetary Space Physics - INAF, Rome, ItalyUNSPECIFIED
Platz, ThomasMax Planck Institut für SonnensystemforschungUNSPECIFIED
Nathues, A.Max-Planck Institute for Solar System Research, Katlenburg-Lindau, GermanyUNSPECIFIED
Longobardo, AINAF-LAPS, Via del Fosso del Cavaliere 100, I-00133 Rome, ItalyUNSPECIFIED
Scully, J.E.C.NASA JPL, California Institute of Technology, Pasadena, CaliforniaUNSPECIFIED
Ermakov, AntonMass. Inst. of Technology, Cambridge, MA, United States.UNSPECIFIED
Jaumann, Ralfralf.jaumann (at) dlr.dehttps://orcid.org/0000-0002-9759-6597
Buczkowski, D.L.Johns Hopkins University Applied Physics Laboratory 11100 Johns Hopkins Rd. Laurel, MD 20723-6099, USAUNSPECIFIED
Schäfer, M.Max-Planck-Institut für Sonnensystemforschung, Justus-von-Liebig-Weg 3, 37077 Göttingen, GermanyUNSPECIFIED
Thangjam, G. S.max-planck-institut für sonnensystemforschung, justus-von-liebig-weg 3, 37077 göttingen, germanyUNSPECIFIED
Pieters, C.M.Brown University, Providence, RI, USAUNSPECIFIED
Roatsch, ThomasThomas.Roatsch (at) dlr.deUNSPECIFIED
Preusker, Frankfrank.preusker (at) dlr.deUNSPECIFIED
Marchi, SSwRI, Boulder CO, USAUNSPECIFIED
Schmedemann, N.Freie Universitaet Berlin, Inst. of Geosciences, Planetology and Remote Sensing, Malteserstr. 74, 12249 Berlin, GermanyUNSPECIFIED
Hiesinger, H.Westfälische Wilhelms-Universität MünsterUNSPECIFIED
Frigeri, A.National Institute of Astrophysics, Rome, ItalyUNSPECIFIED
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
Date:2018
Journal or Publication Title:Icarus
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:316
DOI :10.1016/j.icarus.2017.08.015
Page Range:pp. 99-113
Publisher:Elsevier
ISSN:0019-1035
Status:Published
Keywords:Asteroid Ceres, cratering, geological processes
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 Geology
Institute of Planetary Research > Planetary Geodesy
Deposited By: Eckart, Lisa Maria
Deposited On:17 Dec 2018 09:00
Last Modified:06 Sep 2019 15:26

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