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Geologic mapping of the Ac-2 Coniraya quadrangle of Ceres from NASAs Dawn mission: Implications for a heterogeneously composed crust

Pasckert, J. H. and Hiesinger, H. and Ruesch, O. and Williams, D.A. and Naß, Andrea and Kneissl, T. and Mest, S. and Buczkowski, D.L. and Scully, J.E.C. and Schmedemann, N. and Jaumann, R. and Roatsch, T. and Preusker, Frank and Nathues, A. and Hoffmann, M. and Schäfer, M. and De Sanctis, M.C. and Raymond, C.A. and Russell, C.T. (2017) Geologic mapping of the Ac-2 Coniraya quadrangle of Ceres from NASAs Dawn mission: Implications for a heterogeneously composed crust. Icarus. Elsevier. DOI: 10.1016/j.icarus.2017.06.015 ISSN 0019-1035

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Abstract

Since its arrival at Ceres, DAWNs Framing Camera has been imaging the dwarf planet at different altitudes, using 8 different filters. Based on these images, global clear filter mosaics, digital terrain models, and global color mosaics were produced. These datasets are basis for the derived photogeologic map of the Ac2 Coniraya quadrangle, located between 0° and 90° eastern longitude and between 20° and 40° northern latitude. Crater size frequency distribution (CSFD) measurements have been applied to derive the stratigraphic history of the identified geologic units in the Ac2 Coniraya quadrangle. Based on these investigations, we found that the Ac2 Coniraya quadrangle shows evidence for a long geologic history lasting over 3.5 Ga. Most of the identified geologic units are related to impact cratering at different periods of time. While the oldest unit identified in the Ac2 Coniraya quadrangle, the cratered terrain, shows an absolute model age (AMA) of 3.3 to 3.5 Ga, the youngest units, including fresh impact craters and lobate flows, show AMAs of < 100 Ma. The large number of different sized impact craters excavated a variety of materials with different colors and albedo, indicative of a heterogeneous crustal composition, including water or volatiles. Pits identified at Ikapati craters smooth deposits might further indicate the presence of volatiles in the subsurface. Furthermore, our mapping of the Ac2 Coniraya quadrangle shows that possible H 2 O ice in the crust is heterogeneously distributed, as lobate flows, bright spots, and pits are only found at certain locations, related to relatively fresh impact craters.

Item URL in elib:https://elib.dlr.de/115140/
Document Type:Article
Additional Information:Bisher nur online erschienen.
Title:Geologic mapping of the Ac-2 Coniraya quadrangle of Ceres from NASAs Dawn mission: Implications for a heterogeneously composed crust
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Pasckert, J. H.institut für planetologie, westfälische wilhelms-universität münster, wilhelm-klemm-strasse 10, 48149 münster, germanyUNSPECIFIED
Hiesinger, H.institut für planetologie, westfälische wilhelms-universität, münster, germanyUNSPECIFIED
Ruesch, O.nasa goddard space flight centerUNSPECIFIED
Williams, D.A.department of geology, arizona state university, tempe, az, usaUNSPECIFIED
Naß, AndreaAndrea.Nass (at) dlr.dehttps://orcid.org/0000-0001-7172-5170
Kneissl, T.freie universität berlin, inst. of geosciences, planetology and remote sensingUNSPECIFIED
Mest, S.planetary science institute, 1700 e. ft. lowell, suite 106, tucson, az, 85719, usaUNSPECIFIED
Buczkowski, D.L.johns hopkins university applied physics laboratory 11100 johns hopkins rd. laurel, md 20723-6099, usaUNSPECIFIED
Scully, J.E.C.nasa jpl, california institute of technology, pasadena, californiaUNSPECIFIED
Schmedemann, N.freie universitaet berlin, inst. of geosciences, planetology and remote sensing, malteserstr. 74, 12249 berlin, germanyUNSPECIFIED
Jaumann, R.ralf.jaumann (at) dlr.deUNSPECIFIED
Roatsch, T.thomas.roatsch (at) dlr.deUNSPECIFIED
Preusker, Frankfrank.preusker (at) dlr.deUNSPECIFIED
Nathues, A.max-planck-institut für sonnensystemforschung, justus-von-liebig-weg 3, 37077 göttingen, germanyUNSPECIFIED
Hoffmann, M.max-planck-institut für sonnensystemforschung, justus-von-liebig-weg 3, 37077 göttingen, germanyUNSPECIFIED
Schäfer, M.max-planck-institut für sonnensystemforschung, justus-von-liebig-weg 3, 37077 göttingen, germanyUNSPECIFIED
De Sanctis, M.C.istituto nazionale di astrofisica, rome, italy.UNSPECIFIED
Raymond, C.A.jet propulsion laboratory, california institute of technology, pasadena, ca, usaUNSPECIFIED
Russell, C.T.institute of geophysics, university of california, los angeles, los angeles, ca 90095UNSPECIFIED
Date:2017
Journal or Publication Title:Icarus
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
DOI :10.1016/j.icarus.2017.06.015
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: Naß, Dr. Andrea
Deposited On:09 Nov 2017 09:55
Last Modified:06 Sep 2019 15:26

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