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Dark material on Vesta from the infall of carbonaceous volatile-rich material

McCord, T. B. and Li, J.-Y and Combe, J.-P. and McSween, H.Y. and Jaumann, Ralf and Reddy , V. and Tosi, F. and Williams, D.A. and Blewett, D.T. and Turrini, D. and Palomba, E. and Pieters, C.M. and de Sanctis, M.C. and Ammannito, E. and Capria, M.T. and Le Corre, L. and Longobardo, A. and Nathues, A. and Mittlefehldt, D.W. and Schröder, S.E. and Hiesinger, H. and Beck, A.W. and Capaccioni, F. and Carsenty, U. and Keller, H.U. and Denevi, B.W and Sunshine, J.M. and Raymond, C.A. and Russell, C.T. (2012) Dark material on Vesta from the infall of carbonaceous volatile-rich material. Nature, 491, pp. 83-86. Nature Publishing Group. DOI: 10.1038/nature11561

Full text not available from this repository.

Abstract

Localized dark and bright materials, often with extremely different albedos, were recently found on Vesta’s surface1, 2. The range of albedos is among the largest observed on Solar System rocky bodies. These dark materials, often associated with craters, appear in ejecta and crater walls, and their pyroxene absorption strengths are correlated with material brightness. It was tentatively suggested that the dark material on Vesta could be either exogenic, from carbon-rich, low-velocity impactors, or endogenic, from freshly exposed mafic material or impact melt, created or exposed by impacts. Here we report Vesta spectra and images and use them to derive and interpret the properties of the ‘pure’ dark and bright materials. We argue that the dark material is mainly from infall of hydrated carbonaceous material (like that found in a major class of meteorites and some comet surfaces3, 4, 5), whereas the bright material is the uncontaminated indigenous Vesta basaltic soil. Dark material from low-albedo impactors is diffused over time through the Vestan regolith by impact mixing, creating broader, diffuse darker regions and finally Vesta’s background surface material. This is consistent with howardite–eucrite–diogenite meteorites coming from Vesta.

Item URL in elib:https://elib.dlr.de/79617/
Document Type:Article
Title:Dark material on Vesta from the infall of carbonaceous volatile-rich material
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
McCord, T. B.Bear Fight Institute, 22 Fiddler’s Road, Box 667, Winthrop, Washington 98862, USAUNSPECIFIED
Li, J.-YPlanetary Science Institute, Tucson, Arizona 85719, USAUNSPECIFIED
Combe, J.-P.Bear Fight Institute, 22 Fiddler’s Road, Box 667, Winthrop, Washington 98862, USAUNSPECIFIED
McSween, H.Y.University of Tennessee, Knoxville, Tennessee 37996, USAUNSPECIFIED
Jaumann, Ralfralf.jaumann (at) dlr.deUNSPECIFIED
Reddy , V.Max Planck Institute for Solar System Research, Max-Planck-Strasse 2, 37191 Katlenburg, GermanyUNSPECIFIED
Tosi, F.Istituto Nazionale di Astrofisica (IASF), Via Fosso del Cavaliere 100, Rome 00133, ItalyUNSPECIFIED
Williams, D.A.ASU, Tempe, Arizona 85287, USAUNSPECIFIED
Blewett, D.T.Johns Hopkins University Applied Physics Laboratory, Laurel, Maryland 20723, USAUNSPECIFIED
Turrini, D.Istituto Nazionale di Astrofisica (IASF), Via Fosso del Cavaliere 100, Rome 00133, ItalyUNSPECIFIED
Palomba, E.Istituto Nazionale di Astrofisica (IASF), Via Fosso del Cavaliere 100, Rome 00133, ItalyUNSPECIFIED
Pieters, C.M.Brown University, Providence, Rhode Island 02912, USAUNSPECIFIED
de Sanctis, M.C.Istituto Nazionale di Astrofisica (IASF), Via Fosso del Cavaliere 100, Rome 00133, ItalyUNSPECIFIED
Ammannito, E.Istituto Nazionale di Astrofisica (IASF), Via Fosso del Cavaliere 100, Rome 00133, ItalyUNSPECIFIED
Capria, M.T.Istituto Nazionale di Astrofisica (IASF), Via Fosso del Cavaliere 100, Rome 00133, ItalyUNSPECIFIED
Le Corre, L.Max Planck Institute for Solar System Research, Max-Planck-Strasse 2, 37191 Katlenburg, GermanyUNSPECIFIED
Longobardo, A.Istituto Nazionale di Astrofisica (IASF), Via Fosso del Cavaliere 100, Rome 00133, ItalyUNSPECIFIED
Nathues, A.Max Planck Institute for Solar System Research, Max-Planck-Strasse 2, 37191 Katlenburg, GermanyUNSPECIFIED
Mittlefehldt, D.W.Astromaterials Research Office, NASA Johnson Space Center, Houston, Texas 77058, USAUNSPECIFIED
Schröder, S.E.Max Planck Institute for Solar System Research, Max-Planck-Strasse 2, 37191 Katlenburg, GermanyUNSPECIFIED
Hiesinger, H.Institut für Planetologie, Westfälische Wilhelms-Universität Münster, Schlossplatz 2, 48149 Munster, GermanyUNSPECIFIED
Beck, A.W.Department of Mineral Sciences, Smithsonian National Museum of Natural History, Washington DC 20024, USAUNSPECIFIED
Capaccioni, F.Istituto Nazionale di Astrofisica (IASF), Via Fosso del Cavaliere 100, Rome 00133, ItalyUNSPECIFIED
Carsenty, U.uri.carsenty (at) dlr.deUNSPECIFIED
Keller, H.U.Institut für Geophysik und extraterrestrische Physik, Mendelssohnstrasse 3, 38106 Braunschweig, GermanyUNSPECIFIED
Denevi, B.WJohns Hopkins University Applied Physics Laboratory, Laurel, Maryland 20723, USAUNSPECIFIED
Sunshine, J.M.Department of Astronomy, University of Maryland, College Park, Maryland 20742, USAUNSPECIFIED
Raymond, C.A.California Institute of Technology, Jet Propulsion Laboratory, Pasadena, California 91109, USAUNSPECIFIED
Russell, C.T.University of California, Los Angeles, California 90095, USAUNSPECIFIED
Date:November 2012
Journal or Publication Title:Nature
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:491
DOI :10.1038/nature11561
Page Range:pp. 83-86
Publisher:Nature Publishing Group
Status:Published
Keywords:Vesta, dark material
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:14 Dec 2012 09:26
Last Modified:08 Mar 2018 18:47

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