Physics
Scientific paper
Dec 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001agufm.p12b0502f&link_type=abstract
American Geophysical Union, Fall Meeting 2001, abstract #P12B-0502
Physics
6055 Surfaces And Interiors, 6062 Satellites, 6218 Jovian Satellites
Scientific paper
Various explanations for the observed surface morphologies of Ganymede have been proposed, including icy volcanism, tectonics and tidal stress. Schenk et. al. (Nature, 410, 57-60, 2001) have suggested that icy volcanism was responsible for the formation of the bright terrain, whose mean elevation is 100 m to 1000 m below that of the heavily cratered dark terrain. Whilst various models have been proposed to account for these features, such investigations have not rigorously modelled the mantle properties that would enable icy volcanism to occur. In this paper, we employ a genetic algorithm to explore a range of mantle parameters to find those that will allow icy volcanism to occur on Ganymede. The thermal evolution of the satellite was calculated for various sets of mantle parameters and with the convection criteria formulated via a parameterised scheme. This method relates the core heat flux to the mantle thermal gradient through the use of a temperature-dependent viscosity law. This work is supported by the Australian Research Council. >http://www.maths.monash.edu.au/ ~justin/agu2001/
Freeman J. C.
Prentice A. J.
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