A geochemical model of the troposphere and crust of Venus based on new data

Details A geochemical model of the troposphere and crust of Venus based on new data A geochemical model of the troposphere and crust of Venus based on new data

Dec 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979geokh.....1747k&link_type=abstract

Geokhimiia, Dec. 1979, p. 1747-1758. In Russian.

Computer Science

Atmospheric Models, Geochemistry, Planetary Composition, Planetary Crusts, Troposphere, Venus Atmosphere, Mineralogy, Photochemical Reactions, Pioneer Venus 2 Spacecraft, Venera Satellites, Venus Surface

Scientific paper

A model of the geochemistry of the Venus troposphere and crust based on Venera 11 and 12 and Pioneer Venus measurements of atmospheric composition is proposed. The contradictory results concerning the nature of the atmosphere obtained by Venera 12 and Pioneer Venus are explained in terms of convective cells in the subcloud layer leading to the upward flow of reducing gases derived from the crust, which was measured by Venera 12, and the downward flow of oxidizing gases produced by photochemical reactions in the atmosphere, measured by Pioneer Venus. A consideration of thermodynamic and kinetic factors leads to the conclusion that the atmosphere extending from the cloud base to an altitude of several hundred meters is not in equilibrium, and thermodynamic calculations for a 16-component troposphere-basalt system open with respect to H2O, CO2, CO, SO2, HCl and HF predict the volatile-bearing minerals to consist of pyrite, anhydrite, marialite and phlogopite.

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