Earth and Mars - Water inventories as clues to accretional histories

Details Earth and Mars - Water inventories as clues to accretional histories Earth and Mars - Water inventories as clues to accretional histories

Jul 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992icar...98...61c&link_type=abstract

Icarus (ISSN 0019-1035), vol. 98, no. 1, July 1992, p. 61-71.

Mathematics

Logic

44

Earth (Planet), Mars (Planet), Planetary Composition, Planetary Evolution, Water, Earth Mantle, Geochronology, Geology, Planetary Mantles

Scientific paper

The earth mantle's content of several times more water than the Martian mantle, even after allowing for plate tectonics, is presently attributable to two possible causes. In the first scenario, the earth's development of a steam atmosphere melted the earth's surface after accretion and allowed impact-devolatilized water at the surface to dissolve into the earth's interior. On Mars, the surface may not have melted, and the devolatilized water would then have been incapable of dissolving into the surface. In the second and more likely scenario, Mars' late, volatile-rich surface veneer was not folded into the interior like the earth's, but instead remained as a water-rich veneer; this is consistent with the current understanding of Mars' geologic history.

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