The origin of grooved terrain on Ganymede - Insights from Galileo high-resolution imaging

Details The origin of grooved terrain on Ganymede - Insights from Galileo high-resolution imaging The origin of grooved terrain on Ganymede - Insights from Galileo high-resolution imaging

Mar 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997lpi....28.1063p&link_type=abstract

Conference Paper, 28th Annual Lunar and Planetary Science Conference, p. 063.

Mathematics

Logic

1

Ganymede, Planetary Evolution, Terrain Analysis, Satellite Surfaces, Galileo Spacecraft, Satellite Imagery, Grooves, High Resolution, Geological Faults

Scientific paper

The first two orbits of the Galileo spacecraft through the Jovian system saw two close encounters with Ganymede. Imaging of Ganymede's bright grooved terrain is a primary objective of the SSI instrument in order to elucidate the nature, origin, and evolution of grooved terrain and its constituent structures. Galileo images are in agreement with the basic elements of the Voyager-based view in which grooved terrain formation is dominated by extensional tectonism, likely in combination with icy volcanism, but Galileo images reveal remarkable new insights into the process of grooved terrain formation, including: the prevalence of small-scale structures interpreted as domino-style tilt blocks, and an inferred change in tectonic style from horst-and-graben to domino-style through time; the ability for tectonism alone (in the absence of icy volcanism) to 'resurface' lanes of bright terrain; the importance of a shear component in grooved terrain formation; and the presence of integrated patterns of contemporaneous deformation.

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