A geometric analysis of surface deformation - Implications for the tectonic evolution of Ganymede

Details A geometric analysis of surface deformation - Implications for the tectonic evolution of Ganymede A geometric analysis of surface deformation - Implications for the tectonic evolution of Ganymede

Oct 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984icar...60..200z&link_type=abstract

Icarus (ISSN 0019-1035), vol. 60, Oct. 1984, p. 200-210.

Physics

15

Ganymede, Planetary Surfaces, Tectonics, Craters, Morphology, Planetary Evolution, Shear Properties, Strain Distribution, Terrain Analysis, Jupiter, Satellites, Ganymede, Geometry, Analysis, Surface, Deformation, Tectonism, Evolution, Furrows, Shape, Impact Features, Craters, Motion, Hypotheses, Galileo Regio, Marius Regio, Uruk Sulcus, Deformation, Lithosphere, Extension, Formation

Scientific paper

The identification of various types of surface deformation of Ganymede by a geometric study of the furrow system and an analysis of circularity of impact craters is addressed. The hypothesis that the furrow system was initially concentric and that the present configuration of the furrows provides a measure of lateral motion of dark terrain is tested by determining the present centers of the furrow system in several dark terrain blocks and observing the amount of deformation in bright terrain regions which separate these blocks. An upper scale limit is placed on the amount of extension associated with bright terrain formation by using the deviation from circularity of impact craters to calculate the strain field around wedge-shaped regions of bright terrain. Penetrative deformation in Ganymede's lithosphere is identified by examining the circularity of impact craters in dark terrain.

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