Accretion, loss, and fractionation of martian water

Details Accretion, loss, and fractionation of martian water Accretion, loss, and fractionation of martian water

Jan 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004icar..167..225d&link_type=abstract

Icarus, Volume 167, Issue 1, p. 225-227.

Physics

6

Solar System, Interior, Atmosphere

Scientific paper

A recently published model for accretion of water by Mars from asteroids and comets beyond 2.5 AU calls for Mars to have accreted 6-27% of Earth's ocean (equivalent to 600-2700 meters depth on Mars' surface) with a D/H ratio 1.2-1.6 times Standard Mean Ocean Water. This model is shown to provide enough outgassed water to account for the subsequent evolution of D/H because of loss of hydrogen and the D/H ratio in water of hydration found in martian meteoric minerals, but enhanced rate loss of hydrogen from early Mars is necessary to permit adequate fractionation to occur during the lifetime of the planet.

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