Subsidence of topography on Io

Details Subsidence of topography on Io Subsidence of topography on Io

May 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987icar...70..348w&link_type=abstract

Icarus (ISSN 0019-1035), vol. 70, May 1987, p. 348-353.

Physics

15

Io, Planetary Geology, Satellite Surfaces, Subsidence, Topography, Dissipation, Lithosphere, Orography, Rheology, Jupiter, Satellites, Io, Topography, Surface, Features, Subsidence, Mantle, Thermal Effects, Erosion, Crust, Thickness, Calculations, Magma Ocean, Viscosity, Interior, Models, Geometry, Volcanism

Scientific paper

The underlying roots of Io's topographic features are softened and eroded by contact with the hot mantle, resulting in a subsidence which is analogous to the progress of a butter pat on a frying pan. This process would be offset by crustal thickening due to continuing volcanism if the rate for this phenomenon were more than the observed 1 cm/year or less. Because the crustal thinning would occur at about 50 cm/year if the material underneath were a pure magma ocean, Io cannot have a global magna ocean, and interior viscosities greater than about 10 to the 10th P are implied.

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