Early outgassing of Mars supported by differential water solubility of iodine and xenon

Details Early outgassing of Mars supported by differential water solubility of iodine and xenon Early outgassing of Mars supported by differential water solubility of iodine and xenon

Aug 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991natur.352..697m&link_type=abstract

Nature (ISSN 0028-0836), vol. 352, Aug. 22, 1991, p. 697-699. Research supported by NASA.

Computer Science

18

Iodine Isotopes, Mars Atmosphere, Outgassing, Solubility, Xenon Isotopes, Basalt, Chassignites, Nakhlites, Rare Gases, Shergottites

Scientific paper

The Martian atmosphere has a high X-129/Xe-132 ratio compared to the Martian mantle. As Xe-129 is the daughter product of the extinct nuclide I-129, a means of fractionating iodine from xenon early in Martian history appears necessary to account for the X-129/Xe-132 ratios of its known reservoirs. A model is presented here to account for the Marian xenon data which relies on the very different solubilities of xenon and iodine in water to fractionate them after outgassing. Atmospheric xenon is lost by impact erosion during heavy bombardment, followed by release of Xe-129 produced from I-129 decay in the crust.

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