Constraints on the lithospheric structure of Venus from mechanical models and tectonic surface features

Details Constraints on the lithospheric structure of Venus from mechanical models and tectonic surface features Constraints on the lithospheric structure of Venus from mechanical models and tectonic surface features

Mar 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987jgr....92..541z&link_type=abstract

(Lunar and Planetary Institute, NASA, AAS, et al., Lunar and Planetary Science Conference, 17th, Houston, TX, Mar. 17-21, 1986)

Physics

104

Deformation, Lithosphere, Radar Imagery, Tectonics, Venus Surface, Compression Loads, Constraints, Planetary Mantles, Planetary Mapping, Tensile Stress, Topography

Scientific paper

The evidence for the extensional or compressional origins of some prominent Venusian surface features disclosed by radar images is discussed. Using simple models, the hypothesis that the observed length scales (10-20 km and 100-300 km) of deformations are controlled by dominant wavelengths arising from unstable compression or extension of the Venus lithosphere is tested. The results show that the existence of tectonic features that exhibit both length scales can be explained if, at the time of deformation, the lithosphere consisted of a crust that was relatively strong near the surface and weak at its base, and an upper mantle that was stronger than or nearly comparable in strength to the upper crust.

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