Results of morphometric analysis of the Tesserae surface of Venus according to Venera-15 and -16 data

Details Results of morphometric analysis of the Tesserae surface of Venus according to Venera-15 and -16 data Results of morphometric analysis of the Tesserae surface of Venus according to Venera-15 and -16 data

Apr 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991rpsct...4...40i&link_type=abstract

In its JPRS Report: Science and Technology. USSR: Space p 40 (SEE N91-26162 18-12) Transl. into ENGLISH from Astronomicheskiy Ve

Astronomy and Astrophysics

Astronomy

Estimating, Morphology, Satellite Imagery, Topography, Venera Satellites, Venus Surface, Basalt, Buoyancy, Deformation, Distance, Feldspars, Spacing, Thickness

Scientific paper

Tesserae occupy nine million square kilometers of the surface of Venus. Tesserae are raised above the surrounding surface and are crossed by systems of intersecting and parallel ridges and linear depressions. Ridges are peaked and depressions are V-shaped. Tesserae regions can be differentiated by the distances between their ridges, the spacing. The purpose of this article is to determine the spacing of various tesserae regions and to determine the patterns of the distribution of the spacing. The distance between ridges was found to vary from 2 to 38 km, with an average of 6 to 11 km. The global dependence between the area of the tesserae and their average height is calculated. A two-layer model of tesserae structure is presented, and calculations are done to determine the thickness of the upper deformed layer, which is estimated to be 1-2 to 3-7 km thick or 0.5-1 to 1-2 km thick, depending on the model used. It may be defined by the topography of the tesserae. Topography may be supported by upwelling matter or by buoyancy. Buoyance is assumed, and values are determined for different tesserae regions (Fortuna, Tellura, and Laima) and composition (basalt, feldspar).

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