Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981avest..15...11z&link_type=abstract
(Astronomicheskii Vestnik, vol. 15, Jan.-Mar. 1981, p. 11-16.) Solar System Research, vol. 15, no. 1, July 1981, p. 8-12. Trans
Astronomy and Astrophysics
Astronomy
2
Planetary Cores, Planetary Mantles, Shear Stress, Silicates, Stress Distribution, Venus Surface, Equatorial Regions, Gravitational Fields
Scientific paper
The shearing stresses in the silicate mantle of Venus are calculated. The maximum shearing stresses, of about 13.6 bar, act in the equatorial plane at the liquid core boundary. These stresses rapidly diminish with distance from the mantle-core boundary, and in the upper mantle of the planet they are about 1-3 bar. Stresses in the planet's polar planes are approximately half of what they are in the equatorial plane. In view of the low level of stresses in the Venusian interior, the conclusion is drawn that the planet's interior deeper than its lithosphere is aseismic. An estimate is made of Venus' rotation paleoperiod (16.9 +0.3, -0.4 days), which shows that at some earlier time the planet rotated considerably faster. Also, shearing stresses in the silicate mantle of Mars are calculated.
Zasurskii Ia. I.
Zharkov Vladimir Naumovich
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