Internal processes affecting surfaces of low-density satellites - Ganymede and Callisto

Details Internal processes affecting surfaces of low-density satellites - Ganymede and Callisto Internal processes affecting surfaces of low-density satellites - Ganymede and Callisto

Oct 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979jgr....84.6263p&link_type=abstract

Journal of Geophysical Research, vol. 84, Oct. 10, 1979, p. 6263-6276.

Mathematics

Logic

8

Callisto, Galilean Satellites, Ganymede, Geology, Planetary Evolution, Planetary Surfaces, Albedo, Cratering, Icy Satellites, Lithosphere, Silicates, Surface Temperature, Jupiter, Satellites, Ganymede, Callisto, Surface, Density, Interiors, Silicates, Diagrams, Characteristics, Viscosity, Chemistry, Evolution, Thermal Effects, Stress, Ice, Lithospheres, Temperatures, Pressure, Volcanism, Features, Rheology, Geology, History, Topography, Magmas, Wavelengths, Deformation, Water, Geometry, Albedo, Models

Scientific paper

Possible significant physical processes on low-density (icy) satellites, particularly Ganymede and Callisto, are outlined, and the relations of these interior processes to the formation and evolution of satellite surfaces are discussed. A variety of mechanisms is shown to lead to interior melting in early satellite history and a configuration characterized by a predominantly water ice lithosphere overlying a mantle containing liquid water. Physical processes capable of affecting the lithosphere of an ice-silicate body and thus creating observable surface features are assessed, including tectonic stresses from tidal deformation and volume changes, gravitational effects on density differences and water volcanism. The residence time of surface features on icy bodies produced by the outlined processes and by impact cratering is considered, and a tentative outline of the geologic history of Ganymede and Callisto is presented. Observations from Voyager and Galileo are expected to provide evidence on the evolution and geologic history of low-density satellites.

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