The high-pressure phase relation of the MgSO4-H2O system and its implication for the internal structure of Ganymede

Details The high-pressure phase relation of the MgSO4-H2O system and its implication for the internal structure of Ganymede The high-pressure phase relation of the MgSO4-H2O system and its implication for the internal structure of Ganymede

Jan 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011icar..211..648n&link_type=abstract

Icarus, Volume 211, Issue 1, p. 648-654.

Computer Science

Scientific paper

We have determined the phase relation of the MgSO4-H2O binary system using an externally heated diamond anvil cell in the compositional range of 0-30 wt.% MgSO4, and under temperature and pressure conditions from 298 to 500 K and up to 4.5 GPa. Using our experimental results, we were able to estimate the composition of the ice mantle of the large icy satellites of Jupiter, such as Ganymede.In our experiments, we identified the following phases in the MgSO4-H2O system up to 4 GPa at 298 K: Ices VI and VII, magnesium heptahydrate, MgSO4·7H2O, and a liquid phase. The present phase relations suggest that there may be a deep internal ocean down to a depth about 800 km in the interior of Ganymede.

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