Mathematics – Probability
Scientific paper
Apr 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988icar...74...98l&link_type=abstract
(Conference on the Origin and Evolution of Planetary and Satellite Atmospheres, Tucson, AZ, Mar. 10-14, 1987) Icarus (ISSN 0019-
Mathematics
Probability
7
Atmospheric Composition, Lunar Composition, Planetary Evolution, Terrestrial Planets, Water, Astronomical Models, Geochemistry, Geochronology, Primitive Earth Atmosphere, Tectonics, Planets, Terrestrial Planets, Water, Moon, Earth, Venus, Mars, Models, Hypotheses, Comparisons, Hydrosphere, Thermal Properties, Convection, Mantle, Plate Tectonics, Melting, Carbon Dioxide
Scientific paper
Current thermal models for the terrestrial planets, with the exception of Mercury, point to the probability of a partial melting zone's presence in the mantles of both Venus and Mars, but not in that of the earth; this is attested by the fact that plate tectonics is not apparent on Mars and Venus. In addition, the CO2-dominated atmospheres of Venus and Mars may indicate that a large-scale hydrosphere has never (or only very briefly) existed on these planets. Most of the free H2O above the water line of Venus and Mars is probably still trapped inside mantle melts.
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