Incorporation of argon, krypton and xenon into clathrates on Mars

Details Incorporation of argon, krypton and xenon into clathrates on Mars Incorporation of argon, krypton and xenon into clathrates on Mars

Sep 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009icar..203...66s&link_type=abstract

Icarus, Volume 203, Issue 1, p. 66-70.

Physics

6

Scientific paper

Calculations of the trapping of heavy noble gases within multiple guest clathrates under Mars-like conditions show that a substantial fraction of the martian Xe, perhaps even the vast majority, could be in clathrates. In addition, the Xe/Kr ratio in the clathrates would probably be much higher than in the atmosphere, so the formation or dissociation of a relatively small amount of clathrate could measurably change the atmospheric ratio. Relatively crude (factor of 2) measurements of the seasonal variability in that ratio by in situ spacecraft would be sensitive to ˜10% of the seasonal atmospheric CO2 variability being a result of clathrates, rather than pure CO2 frost. In addition, sequestration of Xe in clathrates remains a viable mechanism for explaining the variable Xe/Kr ratios seen in different suites of martian meteorites.

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