Other
Scientific paper
Jan 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982natur.295..290p&link_type=abstract
Nature, vol. 295, Jan. 28, 1982, p. 290-293.
Other
58
Ganymede, Planetary Structure, Satellite Surfaces, Tectonics, Terrain Analysis, Ice, Lithosphere, Photogeology, Silicates, Voyager Project, Crust, Patterns, Origin, Relaxation, Experiments, Graben, Cracks, Ice, Deformation, Fragmentation, Stress, Evolution, Craters, Cores, Grooves, Satellites, Ganymede, Tectonism, Surface, Terrain, Geology, Thickness, Formation, Rifts, Silicates, Photographs, Diagrams, Models, Features, Viscosity, Lithosphere, Interiors, Polymorphism, Temperatures, Jupiter, Volume, Thermal
Scientific paper
Evidence of tectonic activity has been found on the Jupiter moon Ganymede, which is the largest solar system icy object known. The transition of dense ice polymorphs in the deep interior of large icy bodies to either less dense polymorphs or liquid water at shallow depths, as internal differentiation and formation of a silicate core occurs, could increase Ganymede's surface area by as much as 7%. If the tectonic evolution of Ganymede is to be described by a progressive fragmentation of an initially uniform lithosphere in response to planetary expansion, the stress transmitted across different areas of bright terrain must differ significantly. Alternatively, lithospheric thickness variations or such other mechanisms as tidal distortion or convection stresses beneath the lithosphere may have been important.
Allison M. L.
Head James W.
Parmentier Marc E.
Squyres Steve W.
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