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The Ac-5 (Fejokoo) quadrangle of Ceres: Geologic map and geomorphological evidence for ground ice mediated surface processes

Hughson, K. and Russell, C.T. and Williams, D.A. and Buczkowski, D.L. and Mest, S. and Pasckert, J. H. and Scully, J.E.C. and Combe, J. P. and Platz, Thomas and Ruesch, O. and Preusker, Frank and Jaumann, Ralf and Nass, Andrea and Roatsch, Thomas and Nathues, A. and Schaefer, Martin and Schmidt, B. and Chilton, H. and Ermakov, Anton and Singh, S. and McFadden, L.A. and Raymond, C.A. (2018) The Ac-5 (Fejokoo) quadrangle of Ceres: Geologic map and geomorphological evidence for ground ice mediated surface processes. Icarus, 316, pp. 63-83. Elsevier. DOI: 10.1016/j.icarus.2017.09.035 ISSN 0019-1035

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Official URL: https://www.sciencedirect.com/science/article/abs/pii/S0019103516305097

Abstract

NASA's Dawn spacecraft arrived at Ceres on March 6, 2015, and has been studying the dwarf planet through a series of successively lower orbits. Throughout these mission phases Dawn obtained photographic, mineralogical, elemental abundance, and gravity data. Ceres is the largest object in the asteroid belt with a mean diameter of ∼940 km. The Dawn Science Team conducted a geologic mapping campaign for Ceres similar to the one that was implemented on the asteroid Vesta (Dawn's previous target), including production of a Survey- and High Altitude Mapping Orbit (HAMO)-based global map, and a series of 15 Low Altitude Mapping Orbit (LAMO)-based quadrangle maps. In this paper we present the LAMO-based geologic map of the Ac-5 Fejokoo Quadrangle (21–66°N and 270–360°E) and discuss its implications. The Ac-5 quadrangle is primarily composed of ancient cratered terrain punctuated with several moderately fresh impact craters of geologic interest, six large tholi that are possibly cryovolcanic in origin, and an abundance of flows that well represent the full spectrum of mass wasting features observed on Ceres. The Fejokoo quadrangle hosts the majority of Oxo crater, the site of the first spectroscopic detection of H2O ice on the surface of Ceres. The H2O detection is closely related to two distinctive morphological units interpreted as possible high water ice content landslides. These observations and interpretations are consistent with ground ice mediated surface processes on Ceres.

Item URL in elib:https://elib.dlr.de/125316/
Document Type:Article
Title:The Ac-5 (Fejokoo) quadrangle of Ceres: Geologic map and geomorphological evidence for ground ice mediated surface processes
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Hughson, K.University of California Los AngelesUNSPECIFIED
Russell, C.T.Institute of Geophysics, University of California, Los Angeles, Los Angeles, CA 90095UNSPECIFIED
Williams, D.A.Arizona State UniversityUNSPECIFIED
Buczkowski, D.L.Johns Hopkins University Applied Physics Laboratory 11100 Johns Hopkins Rd. Laurel, MD 20723-6099, USAUNSPECIFIED
Mest, S.Planetary Science Institute, 1700 E. Ft. Lowell, Suite 106, Tucson, AZ, 85719, USAUNSPECIFIED
Pasckert, J. H.Institut für Planetologie, Westfälische Wilhelms-Universität Münster, Wilhelm-Klemm-Strasse 10, 48149 Münster, GermanyUNSPECIFIED
Scully, J.E.C.NASA JPL, California Institute of Technology, Pasadena, CaliforniaUNSPECIFIED
Combe, J. P.Space Science Inst., Winthrop WA, USA, Lab. de Planetologie et de Geodynamique, U. de Nantes, Nantes, FranceUNSPECIFIED
Platz, ThomasMax Planck Institut für SonnensystemforschungUNSPECIFIED
Ruesch, O.NASA Goddard Space Flight CenterUNSPECIFIED
Preusker, Frankfrank.preusker (at) dlr.deUNSPECIFIED
Jaumann, Ralfralf.jaumann (at) dlr.dehttps://orcid.org/0000-0002-9759-6597
Nass, Andreaandrea.nass (at) dlr.deUNSPECIFIED
Roatsch, ThomasThomas.Roatsch (at) dlr.deUNSPECIFIED
Nathues, A.Max-Planck Institute for Solar System Research, Katlenburg-Lindau, GermanyUNSPECIFIED
Schaefer, Martinmartin.schaefer (at) dlr.deUNSPECIFIED
Schmidt, B.Georgia Institute of Technology Main CampusUNSPECIFIED
Chilton, H.Georgia Institute of TechnologyUNSPECIFIED
Ermakov, AntonMass. Inst. of Technology, Cambridge, MA, United States.UNSPECIFIED
Singh, S.UNSPECIFIEDUNSPECIFIED
McFadden, L.A.NASA Goddard Space Flight Center, Greenbelt, MD 20770UNSPECIFIED
Raymond, C.A.Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109-8099, USAUNSPECIFIED
Date:2018
Journal or Publication Title:Icarus
Refereed publication:Yes
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:316
DOI :10.1016/j.icarus.2017.09.035
Page Range:pp. 63-83
Publisher:Elsevier
ISSN:0019-1035
Status:Published
Keywords:Ceres Dawn Dwarf planet Geologic map Ground ice
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:19 Dec 2018 07:56
Last Modified:19 Dec 2018 07:56

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