Geoid, topography, and convection-driven crustal deformation on Venus

Details Geoid, topography, and convection-driven crustal deformation on Venus Geoid, topography, and convection-driven crustal deformation on Venus

Mar 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993lpi....24.1307s&link_type=abstract

In Lunar and Planetary Inst., Twenty-Fourth Lunar and Planetary Science Conference. Part 3: N-Z p 1307-1308 (SEE N94-20636 05-91

Computer Science

Crustal Fractures, Geoids, Gravitational Fields, Lithosphere, Planetary Crusts, Tectonics, Topography, Venus (Planet), Venus Surface, Altimetry, Correlation, Finite Element Method, Gravitation, High Resolution, Thermal Boundary Layer

Scientific paper

High-resolution Magellan images and altimetry of Venus reveal a wide range of styles and scales of surface deformation that cannot readily be explained within the classical terrestrial plate tectonic paradigm. The high correlation of long-wavelength topography and gravity and the large apparent depths of compensation suggest that Venus lacks an upper-mantle low-viscosity zone. A key difference between Earth and Venus may be the degree of coupling between the convecting mantle and the overlying lithosphere. Mantle flow should then have recognizable signatures in the relationships between the observed surface topography, crustal deformation, and the gravity field. Therefore, comparison of model results with observational data can help to constrain such parameters as crustal and thermal boundary layer thicknesses as well as the character of mantle flow below different Venusian features. We explore in this paper the effects of this coupling by means of a finite element modelling technique.

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