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Geologic map of the northern hemisphere of Vesta based on Dawn Framing Camera (FC) images

Ruesch, O. and Hiesinger, H. and Blewett, D. and Williams, D.A. and Buczkowski, D.L. and Scully, J.E.C. and Yingst, R. Aileen and Roatsch, Thomas and Preusker, Frank and Jaumann, R. and Russell, C.T. and Raymond, C.A. (2014) Geologic map of the northern hemisphere of Vesta based on Dawn Framing Camera (FC) images. Icarus, 244, 41 - 59. Elsevier. DOI: 10.1016/j.icarus.2014.01.035 ISSN 0019-1035

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Official URL: http://www.sciencedirect.com/science/article/pii/S0019103514000669

Abstract

Abstract The Dawn Framing Camera (FC) has imaged the northern hemisphere of the Asteroid (4) Vesta at high spatial resolution and coverage. This study represents the first investigation of the overall geology of the northern hemisphere (22–90°N, quadrangles Av-1, 2, 3, 4 and 5) using these unique Dawn mission observations. We have compiled a morphologic map and performed crater size–frequency distribution (CSFD) measurements to date the geologic units. The hemisphere is characterized by a heavily cratered surface with a few highly subdued basins up to ∼200 km in diameter. The most widespread unit is a plateau (cratered highland unit), similar to, although of lower elevation than the equatorial Vestalia Terra plateau. Large-scale troughs and ridges have regionally affected the surface. Between ∼180°E and ∼270°E, these tectonic features are well developed and related to the south pole Veneneia impact (Saturnalia Fossae trough unit), elsewhere on the hemisphere they are rare and subdued (Saturnalia Fossae cratered unit). In these pre-Rheasilvia units we observed an unexpectedly high frequency of impact craters up to ∼10 km in diameter, whose formation could in part be related to the Rheasilvia basin-forming event. The Rheasilvia impact has potentially affected the northern hemisphere also with S–N small-scale lineations, but without covering it with an ejecta blanket. Post-Rheasilvia impact craters are small (<60 km in diameter) and show a wide range of degradation states due to impact gardening and mass wasting processes. Where fresh, they display an ejecta blanket, bright rays and slope movements on walls. In places, crater rims have dark material ejecta and some crater floors are covered by ponded material interpreted as impact melt.

Item URL in elib:https://elib.dlr.de/93900/
Document Type:Article
Additional Information:Special Issue: The Geology of Vesta
Title:Geologic map of the northern hemisphere of Vesta based on Dawn Framing Camera (FC) images
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Ruesch, O.Planetologie, Westfälische Wilhelms-Universität, Wilhelm-Klemm-Str. 10, 48149 Münster, GermanyUNSPECIFIED
Hiesinger, H.Westfälische Wilhelms-Universität MünsterUNSPECIFIED
Blewett, D.Johns Hopkins University Applied Physics Laboratory 11100 Johns Hopkins Rd. Laurel, MD 20723-6099, USAUNSPECIFIED
Williams, D.A.Arizona State UniversityUNSPECIFIED
Buczkowski, D.L.Johns Hopkins University Applied Physics Laboratory 11100 Johns Hopkins Rd. Laurel, MD 20723-6099, USAUNSPECIFIED
Scully, J.E.C.Institute of Geophysics, University of California, Los Angeles, Los Angeles, CA 90095UNSPECIFIED
Yingst, R. AileenPlanetary Science Institute, Tucson, AZ, United States.UNSPECIFIED
Roatsch, Thomasthomas.roatsch (at) dlr.deUNSPECIFIED
Preusker, Frankfrank.preusker (at) dlr.deUNSPECIFIED
Jaumann, R.ralf.jaumann (at) dlr.deUNSPECIFIED
Russell, C.T.Institute of Geophysics, University of California, Los Angeles, Los Angeles, CA 90095UNSPECIFIED
Raymond, C.A.Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109-8099, USAUNSPECIFIED
Date:2014
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:244
DOI :10.1016/j.icarus.2014.01.035
Page Range:41 - 59
Publisher:Elsevier
ISSN:0019-1035
Status:Published
Keywords:Asteroid Vesta; Asteroids, surfaces; 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: Krohn, Dr.rer.nat Katrin
Deposited On:07 Jan 2015 10:03
Last Modified:06 Sep 2019 15:26

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