Dissociation temperatures of methane hydrates at high pressure: Implications for the differentiation of Titan's interior

Details Dissociation temperatures of methane hydrates at high pressure: Implications for the differentiation of Titan's interior Dissociation temperatures of methane hydrates at high pressure: Implications for the differentiation of Titan's interior

Oct 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011epsc.conf..494b&link_type=abstract

EPSC-DPS Joint Meeting 2011, held 2-7 October 2011 in Nantes, France. http://meetings.copernicus.org/epsc-dps2011, p.494

Physics

Scientific paper

The origin of Titan's atmospheric methane has long been debated. Its continuous destruction by photochemical processes in the upper atmosphere suggests that it is renewed by internal outgassing in order to maintain its abundance to the observed value. However, the reservoir localization in the interior as well as the timing and mechanism of outgassing remain unconstrained. Gravity measurements performed by the Cassini Radio Science Experiment [3] indicate that Titan's interior is only moderately differentiated, suggesting that some internal regions may have remained undifferentiated and relatively cold during most of Titan's evolution. This is also supported by accretion models, which show that the deepest part of Titan's interior is undifferentiated at the end of the accretion stage e.g. [Monteux et al., this meeting] of the interior. In order to determine the stability of methane in undifferentiated layers of Titan and its potential effect of its dissociation on the differentiation process, we conduct high pressure experiments in a Diamond Anvil Cell on synthesized samples of methane clathrates.

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