Tectonic framework of grooved terrain on Ganymede

Details Tectonic framework of grooved terrain on Ganymede Tectonic framework of grooved terrain on Ganymede

Aug 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986icar...67..237b&link_type=abstract

Icarus (ISSN 0019-1035), vol. 67, Aug. 1986, p. 237-250.

Other

10

Ganymede, Satellite Surfaces, Tectonics, Terrain Analysis, Grooves, Planetary Craters, Planetary Mapping, Spatial Distribution, Troughs

Scientific paper

The Ganymede surface is distinct in that predominant surface features are grooves that all but obliterate the impact craters common to other objects in the solar system. The orientations of all grooves detected on the Ganymede surface with Voyager imagery were examined to find any regional or global patterns. The analysis was performed by plotting azimuthal frequency diagrams for the groove orientations. The database drew on images of 7200 grooves and 2600 prominent structures covering 35 percent of the Ganymede surface. Predominant NE-SW and NW-SE orientations of the grooves fit in with a global tectonic framework of great circles inclined 35-40 deg to the equatorial plane. The stress pattern could have been caused by rising and falling convection plumes. The limited amount of the surface imaged, however, will constrain models of the underlying tectonic evolution until the Galileo probe acquires more data.

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