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The morphology of Mercury’s Caloris basin as seen in MESSENGER stereo topographic models

Oberst, Jürgen und Preusker, Frank und Phillips, Roger J. und Watters, Thomas R. und Head, James W. und Zuber, Maria T. und Solomon, Sean C. (2010) The morphology of Mercury’s Caloris basin as seen in MESSENGER stereo topographic models. Icarus: International Journal of Solar System Studies, 209 (1), Seiten 230-238. Elsevier. DOI: 10.1016/j.icarus.2010.03.009.

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Offizielle URL: http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6WGF-4YMB68G-1&_user=100058&_coverDate=09%2F30%2F2010&_rdoc=1&_fmt=high&_orig=search&_origin=search&_sort=d&_docanchor=&view=c&_acct=C000007338&_version=1&_urlVersion=0&_userid=100058&md5=49c855537

Kurzfassung

A digital terrain model (1000-m effective spatial resolution) of the Caloris basin, the largest well-characterized impact basin on Mercury, was produced from 208 stereo images obtained by the MESSENGER narrow-angle camera. The basin rim is far from uniform and is characterized by rugged terrain or knobby plains, often disrupted by craters and radial troughs. In some sectors, the rim is represented by a single marked elevation step, where height levels drop from the surroundings toward the basin interior by approximately 2 km. Two concentric rings, with radii of 690 km and 850 km, can be discerned in the topography. Several pre-Caloris basins and craters can be identified from the terrain model, suggesting that rugged pre-impact topography may have contributed to the varying characteristics of the Caloris rim. The basin interior is relatively smooth and shallow, comparable to typical lunar mascon mare basins, supporting the idea that Caloris was partially filled with lava after formation. The model displays long-wavelength undulations in topography across the basin interior, but these undulations cannot readily be related to pre-impact topography, volcanic construction, or post-volcanic uplift. Because errors in the long-wavelength topography of the model cannot be excluded, confirmation of these undulations must await data from MESSENGER’s orbital mission phase.

Dokumentart:Zeitschriftenbeitrag
Titel:The morphology of Mercury’s Caloris basin as seen in MESSENGER stereo topographic models
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Oberst, Jürgenjuergen.oberst@dlr.de
Preusker, Frankfrank.preusker@dlr.de
Phillips, Roger J.Planetary Science Directorate, Southwest Research Institute, Boulder, CO 80302, USA
Watters, Thomas R.Center for Earth and Planetary Studies, National Air and Space Museum, Smithsonian Institution, Washington, DC 20560, USA
Head, James W.Department of Geological Sciences, Brown University, Providence, RI 02912, USA
Zuber, Maria T.Department of Earth, Atmospheric, and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, MA 02139-4307, USA
Solomon, Sean C.Department of Terrestrial Magnetism, Carnegie Institution of Washington, Washington, DC 20015, USA
Datum:September 2010
Erschienen in:Icarus: International Journal of Solar System Studies
Referierte Publikation:Ja
In Open Access:Nein
In SCOPUS:Ja
In ISI Web of Science:Ja
Band:209
DOI :10.1016/j.icarus.2010.03.009
Seitenbereich:Seiten 230-238
Verlag:Elsevier
Status:veröffentlicht
Stichwörter:morphology, Mercury, Caloris basin, MESSENGER, stereo topographic models, NAC
HGF - Forschungsbereich:Verkehr und Weltraum (alt)
HGF - Programm:Weltraum (alt)
HGF - Programmthema:W EW - Erforschung des Weltraums
DLR - Schwerpunkt:Weltraum
DLR - Forschungsgebiet:W EW - Erforschung des Weltraums
DLR - Teilgebiet (Projekt, Vorhaben):W - Vorhaben Planetenforschung (alt)
Standort: Berlin-Adlershof
Institute & Einrichtungen:Institut für Planetenforschung > Planetengeodäsie
Hinterlegt von: Marita Wählisch
Hinterlegt am:10 Jan 2011 09:15
Letzte Änderung:26 Mär 2013 13:25

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