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Large-scale troughs on Vesta: A signature of planetary tectonics

Buczkowski, D.L. and Wyrick, D. Y. and Iyer, K. A. and Kahn, E. G. and Scully, J. and Nathues, A. and Gaskell, R.W. and Roatsch, T. and Preusker, Frank and Schenk, P.M. and Le Corre, L. and Reddy, V. and Yingst, R. Aileen and Mest, S. and Williams, David and Garry, W.B. and Barnouin, O.S. and Jaumann, R. and Raymond, C.A. and Russell, C.T. (2012) Large-scale troughs on Vesta: A signature of planetary tectonics. American Geophysical Union, 3.-5. Dezember 2012, San Francisco, Ca, USA.

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Abstract

Abstract Images of Vesta taken by the Dawn spacecraft reveal large-scale linear structural features on the surface of the asteroid. We evaluate the morphology of the Vesta structures to determine what processes caused them to form and what implications this has for the history of Vesta as a planetary body. The dimensions and shape of these features suggest that they are graben similar to those observed on terrestrial planets, not fractures or grooves such as are found on smaller asteroids. As graben, their vertical displacement versus length relationship could be evaluated to describe and interpret the evolution of the component faults. Linear structures are commonly observed on smaller asteroids and their formation has been tied to impact events. While the orientation of the large-scale Vesta structures does imply that their formation is related to the impact events that formed the Rheasilvia and Veneneia basins, their size and morphology is greatly different from impact-formed fractures on the smaller bodies. This is consistent with new analyses that suggest that Vesta is fully differentiated, with a mantle and core. We suggest that impact into a differentiated asteroid such as Vesta could result in graben, while grooves and fractures would form on undifferentiated asteroids.

Item URL in elib:https://elib.dlr.de/80298/
Document Type:Conference or Workshop Item (Paper)
Title:Large-scale troughs on Vesta: A signature of planetary tectonics
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Buczkowski, D.L.Johns Hopkins University Applied Physics Laboratory 11100 Johns Hopkins Rd. Laurel, MD 20723-6099, USAUNSPECIFIED
Wyrick, D. Y.SWRI, San AntonioUNSPECIFIED
Iyer, K. A.JHU-APLUNSPECIFIED
Kahn, E. G.JHU-APLUNSPECIFIED
Scully, J.UCLA, Institute of Geophysics, Los Angeles, CA 90095-1567, USAUNSPECIFIED
Nathues, A.Max-Planck Institute for Solar System Research, Katlenburg-Lindau, GermanyUNSPECIFIED
Gaskell, R.W.Planetary Science Institute, Tucson, AZ, USAUNSPECIFIED
Roatsch, T.thomas.roatsch (at) dlr.deUNSPECIFIED
Preusker, Frankfrank.preusker (at) dlr.deUNSPECIFIED
Schenk, P.M.Lunar and Planetary Institute, Houston, Texas, USAUNSPECIFIED
Le Corre, L.Max Planck Institute for Solar System Research, Max-Planck-Str. 2, Katlenburg-Lindau, 37191, GermanyUNSPECIFIED
Reddy, V.Department of Space Studies, University of North Dakota, Grand Forks, ND 58202, USAUNSPECIFIED
Yingst, R. AileenPlanetary Science Institute, Tucson, AZ, United States.UNSPECIFIED
Mest, S.Planetary Science Institute, 1700 E. Ft. Lowell, Suite 106, Tucson, AZ, 85719, USAUNSPECIFIED
Williams, DavidArizona State UniversityUNSPECIFIED
Garry, W.B.Planetary Science Institute, Tucson, AZ, USAUNSPECIFIED
Barnouin, O.S.Johns Hopkins University Applied Physics Laboratory, Laurel, MD 20723UNSPECIFIED
Jaumann, R.ralf.jaumann (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
Date:September 2012
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:Vesta
Event Title:American Geophysical Union
Event Location:San Francisco, Ca, USA
Event Type:international Conference
Event Dates:3.-5. Dezember 2012
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
Deposited By: Aydin, Zeynep
Deposited On:09 Jan 2013 10:57
Last Modified:01 Dec 2018 19:48

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