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Geologic mapping of the Urvara and Yalode Quadrangles of Ceres

Crown, D.A. and Sizemore, H. and Yingst, R. Aileen and Mest, S.C. and Platz, Thomas and Berman, D. and Schmedemann, N. and Buczkowski, D.L. and Williams, D.A. and Roatsch, Thomas and Preusker, Frank and Raymond, C.A. and Russell, C.T. (2018) Geologic mapping of the Urvara and Yalode Quadrangles of Ceres. Icarus, 316, pp. 167-190. Elsevier. doi: 10.1016/j.icarus.2017.08.004. ISSN 0019-1035.

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Official URL: https://www.sciencedirect.com/science/article/pii/S0019103516307886


We conducted geologic mapping of the Urvara (Ac-13) and Yalode (Ac-14) Quadrangles (21–66°S, 180–360°E) of the dwarf planet Ceres utilizing morphologic, topographic, and compositional information acquired by NASA's Dawn mission. The geologic characteristics of the two large impact basins Urvara (170 km diameter) and Yalode (260 km diameter) and their surroundings were investigated using Dawn Framing Camera datasets, including Survey (415 m/pixel), HAMO (140 m/pixel), and LAMO (35 m/pixel) images and mosaics, color and color ratio images, and DTMs derived from stereo-photogrammetry. Geologic mapping demonstrates that impact cratering has dominated the geologic history of the Urvara and Yalode Quadrangles, with early cratered terrain formation followed by formation of the large basins and widespread emplacement of basin-related smooth material. Impact craters display a wide range of preservation states from nearly completely buried/degraded forms to more recent pristine craters with terraced inner walls and lobate ejecta deposits. Cross-cutting relationships and morphologic signatures show that the Urvara impact followed the Yalode impact, consistent with ages derived from crater size-frequency distributions (580 ± 40 Ma for Yalode and 550 ± 50 Ma for Urvara). Observed differences in basin materials and rim morphology suggest heterogeneities in the substrate excavated by impact. Smooth deposits that cover large areas of the quadrangles, including the basin floors, rims, and exterior zones, are interpreted to be dominated by Urvara ejecta but Yalode ejecta and localized ice-rich flow material may be minor components. Geologic mapping results and simulations of ejecta emplacement suggest that Urvara and Yalode ejecta deposits extend for large distances (more than two crater diameters from the basin centers) and may serve as important stratigraphic markers for the geologic record of Ceres.

Item URL in elib:https://elib.dlr.de/125244/
Document Type:Article
Title:Geologic mapping of the Urvara and Yalode Quadrangles of Ceres
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Crown, D.A.Planetary Science InstituteUNSPECIFIED
Sizemore, H.planetary science institute, tucson, az, united states.UNSPECIFIED
Yingst, R. AileenPlanetary Science Institute, Tucson, AZ, United States.UNSPECIFIED
Mest, S.C.Planetary Science Institute,Tucson, AZUNSPECIFIED
Platz, ThomasMax Planck Institut für SonnensystemforschungUNSPECIFIED
Berman, D.Planetary Science Institute, 1700 E. Ft. Lowell, Suite 106, Tucson, AZ, 85719, USAUNSPECIFIED
Schmedemann, N.Freie Universitaet Berlin, Inst. of Geosciences, Planetology and Remote Sensing, Malteserstr. 74, 12249 Berlin, GermanyUNSPECIFIED
Buczkowski, D.L.Johns Hopkins University Applied Physics Laboratory 11100 Johns Hopkins Rd. Laurel, MD 20723-6099, USAUNSPECIFIED
Williams, D.A.Arizona State UniversityUNSPECIFIED
Roatsch, ThomasThomas.Roatsch (at) dlr.deUNSPECIFIED
Preusker, Frankfrank.preusker (at) dlr.deUNSPECIFIED
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
Journal or Publication Title:Icarus
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:Yes
DOI :10.1016/j.icarus.2017.08.004
Page Range:pp. 167-190
Keywords:Ceres geological processes, mapping
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Exploration
DLR - Research area:Raumfahrt
DLR - Program:R EW - Space Exploration
DLR - Research theme (Project):R - Project 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:18 Dec 2018 10:04
Last Modified:06 Sep 2019 15:26

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