Interpreting gravity, geoid and topography for convection with temperature dependent viscosity: Application to surface features on Venus

Details Interpreting gravity, geoid and topography for convection with temperature dependent viscosity: Application to surface features on Venus Interpreting gravity, geoid and topography for convection with temperature dependent viscosity: Application to surface features on Venus

Oct 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995jgr...10021155m&link_type=abstract

Journal of Geophysical Research, Volume 100, Issue E10, p. 21155-21172

Physics

17

Tectonophysics: Dynamics, Convection Currents And Mantle Plumes, Gravity And Tectonics, Planetology: Solid Surface Planets: Interiors, Tectonophysics: Rheology-Mantle

Scientific paper

While Venus and Earth are similar in size, Venus does not appear to have developed the same system of mobile surface plates which dominates convective heat transfer from the interior of Earth. Numerical models with temperature dependence viscosity do not produce plate boundaries and are more closely reminiscent of Venus than Earth. We demonstrate that many puzzzling aspects of surface features on Venus are also found in the analysis of the surface observables in these models. Despite having no strong lithosphere, our calculations exhibit very high geoid/topography ratios and uncompensated short-wavelength topography. Surface heat flux values are not required to be very different from Earth-scaled values, and the mantle remains below the likely solidus. .

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