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The Distribution of Bright and Dark Material on Ganymede in Relationship to Surface Elevation and Slopes

Oberst, J. and Schreiner, B. and Giese, B. and Neukum, G. and Head, J.W. and Pappalardo, R.T. and Helfenstein, P. (1999) The Distribution of Bright and Dark Material on Ganymede in Relationship to Surface Elevation and Slopes. Icarus, 140, pp. 283-293.

Full text not available from this repository.

Abstract

The unique high-resolution digital terrain data set available for Ganymede's Uruk Sulcus area is analyzed by quantitative image analysis techniques to identify relationships between surface brightness, elevation and slopes. Broad and narrow ridges and grooves of the Uruk Sulcus terrain model are found to be aligned with bright and dark lineament patterns visible in images. These prominent lineametns represent areas covered by bright and dark albedo material, not effects of photometric shading. There is a strong correlation between material locations and elevation: bright material is found topographic highs, whereas dark material is located in depressions; the relative abundance of the dark material increases with lower elevation. In Galileo Regio, we find that bright material is also located in slopes facing north. We suggest that the bright material in Uruk Sulcus and Galileo Regio was emplaced or exposed during or after formation of the terrain in its present location, whereas the dark material was eroded and redistributed down-slope. Effects of net solar illumination may play a role in the peculiar azimuthal distribution of bright and dark material on slopes.

Document Type:Article
Additional Information: LIDO-Berichtsjahr=1999,
Title:The Distribution of Bright and Dark Material on Ganymede in Relationship to Surface Elevation and Slopes
Authors:
AuthorsInstitution or Email of Authors
Oberst, J.UNSPECIFIED
Schreiner, B.UNSPECIFIED
Giese, B.UNSPECIFIED
Neukum, G.UNSPECIFIED
Head, J.W.Department of Geological Sciences, Brown University, Providence, RI, USA
Pappalardo, R.T.Department of Geological Sciences, Brown University, Providence, RI, USA
Helfenstein, P.Department of Astronomy, Cornell University, Ithaca, NY, USA
Date:1999
Journal or Publication Title:Icarus
Refereed publication:Yes
In ISI Web of Science:Yes
Volume:140
Page Range:pp. 283-293
Status:Published
Keywords:satellites of Jupiter, surfaces, Ganymede
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W EW - Erforschung des Weltraums
DLR - Research area:Space
DLR - Program:W EW - Erforschung des Weltraums
DLR - Research theme (Project):UNSPECIFIED
Location: Berlin-Adlershof
Institutes and Institutions:Institut für Weltraumsensorik und Planetenerkundung
Deposited By: Susanne Pieth
Deposited On:16 Sep 2005
Last Modified:14 Jan 2010 18:29

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