Carbon-rich interiors of Ganymede and Titan: application of a kinetic model of carbonaceous organic matter transformation
Résumé
Compostion models of icy bodies require the incorporation of important volume of carbonaceous organic matter (COM) in their rocky cores to account for their density and moment of inertia [1] , as measured by the Cassini and Galileo missions. In these models, the effects of temperature and pressure on COM were either simplified or neglected due to the lack of experimental data. To address this, we conducted experiments to constrain the evolution of COM composition and density at elevated temperatures and pressures within the range of icy moons core conditions (up to ~7 GPa and 1300 K in Ganymede's core). Type III kerogens were used as analogs for COM to quantify this transformation.
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