Consequences of a hydrous mantle for Venus tectonics - Predictions for Magellan

Details Consequences of a hydrous mantle for Venus tectonics - Predictions for Magellan Consequences of a hydrous mantle for Venus tectonics - Predictions for Magellan

Aug 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990georl..17.1397w&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 17, Aug. 1990, p. 1397-1400.

Astronomy and Astrophysics

Astronomy

11

Magellan Project (Nasa), Planetary Evolution, Planetary Mantles, Tectonics, Venus Surface, Water, Astronomical Models, Heat Transfer, Lithosphere, Magma, Moon, Planetary Crusts, Radar Imagery

Scientific paper

The consequences of a Venus mantle enriched in water relative to the earth are considered. If the moon-forming impact hypothesis is correct, earth may have lost substantial volatiles. Venus, however, experienced no such impact and is therefore likely to be relatively more water-rich. It is demonstrated that a higher abundance of water in the Venus mantle has the effect of inhibiting the rise of crust-forming melts and volatiles to the surface, which results in a thin stable crust, a dry, stiff upper mantle, and restricted magmatism. Conduction through a shallow thermal lithosphere dominates the removal of heat from the interior, and flow in the mantle is strongly coupled to the surface deformation. Current observations of Venus are consistent with this model. A review of the consequences of this model makes it possible to make predictions for the Magellan radar images.

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