dc.contributor.author
Crown, David A.
dc.contributor.author
Sizemore, Hanna G.
dc.contributor.author
Yingst, R. Aileen
dc.contributor.author
Mest, Scott C.
dc.contributor.author
Platz, Thomas
dc.contributor.author
Berman, Daniel C.
dc.contributor.author
Schmedemann, Nico
dc.contributor.author
Buczkowski, Debra L.
dc.contributor.author
Williams, David A.
dc.contributor.author
Roatsch, Thomas
dc.date.accessioned
2019-05-23T11:21:36Z
dc.date.available
2019-05-23T11:21:36Z
dc.identifier.uri
https://refubium.fu-berlin.de/handle/fub188/24626
dc.identifier.uri
http://dx.doi.org/10.17169/refubium-2389
dc.description.abstract
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.
en
dc.rights.uri
https://creativecommons.org/licenses/by/4.0/
dc.subject
geologic mapping
en
dc.subject
Yalode Quadrangles
en
dc.subject.ddc
500 Naturwissenschaften und Mathematik::550 Geowissenschaften, Geologie::550 Geowissenschaften
dc.title
Geologic mapping of the Urvara and Yalode Quadrangles of Ceres
dc.type
Wissenschaftlicher Artikel
dcterms.bibliographicCitation.doi
10.1016/j.icarus.2017.08.004
dcterms.bibliographicCitation.journaltitle
Icarus
dcterms.bibliographicCitation.pagestart
167
dcterms.bibliographicCitation.pageend
190
dcterms.bibliographicCitation.volume
316
dcterms.bibliographicCitation.url
https://doi.org/10.1016/j.icarus.2017.08.004
refubium.affiliation
Geowissenschaften
refubium.resourceType.isindependentpub
no
dcterms.accessRights.openaire
open access