Astronomy and Astrophysics – Astronomy
Scientific paper
May 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990icar...85..191h&link_type=abstract
Icarus (ISSN 0019-1035), vol. 85, May 1990, p. 191-204.
Astronomy and Astrophysics
Astronomy
25
Icy Satellites, Lithosphere, Satellite Atmospheres, Satellite Surfaces, Astronomical Models, Planetary Geology, Tectonics, Planets, Satellites, Icy Bodies, Lithosphere, Extension, Compression, Stability, Mechanical Processes, Asthenosphere, Grooves, Formation, Origin, Ganymede, Enceladus, Miranda, Parameters, Topography, Strain, Terrain, Temperature, Ice, Emplacement, Thickness, Hypotheses, Models, Timescale, Deformation, Diagrams, Calculations, Jupiter, Uranus, Saturn, Surface, Features
Scientific paper
The plausibility of invoking a lithospheric instability mechanism to account for the grooved terrains on Ganymede, Encedalus, and Miranda is presently evaluated in light of the combination of a simple mechanical model of planetary lithospheres and asthenospheres with recent experimental data for the brittle and ductile deformation of ice. For Ganymede, high surface gravity and warm temperatures render the achievement of an instability sufficiently great for the observed topographic relief virtually impossible; an instability of sufficient strength, however, may be able to develop on such smaller, colder bodies as Encedalus and Miranda.
Herrick D. L.
Stevenson Jacob D.
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