caa a22 4500 477047378 CHVBK 20180405111334.0 cr unu---uuuuu 170330e19960901xx s 000 0 eng 10.1007/BF00874733 doi (NATIONALLICENCE)springer-10.1007/BF00874733 Weinstein Stuart Department of Geology and Geophysics, SOEST, University of Hawaii, 96822, Honolulu, HI, USA aut Thermal convection in a cylindrical annulus with a non-Newtonian outer surface [Elektronische Daten] [Stuart Weinstein] This study presents the results of numerical simulations of a model for lithospheremantle coupling in a terrestrial type planet. To first order, a geologically active terrestrial type planet may consist of a metallic core, silicate mantle and lithosphere, with the lithosphere being rheologically different from the mantle. Therefore we have developed a numerical model consisting of a thin non-Newtonian fluid hoop that is dynamically coupled to a thick Newtonian fluid cylindrical annulus. Thus the rheological dichotomy between mantle and lithosphere is built into the model. Time-dependent calculations show the existence of at least two regimes of behaviors. In one regime, the behavior of the hoop switches between periods characterized by low or high speeds, in response to changes in convective vigor and planform. This regime may apply to the planet Venus where the available evidence indicates that prior to 500 myr ago, the planet was resurfaced on a time scale of <100 myr. Since that time, large-scale tectonic activity on Venus has been sharply curtailed. In the other regime, which is more like plate tectonics on Earth, the hoop speeds rise and fall on short time scales. Birkhäuser Verlag, 1996 Cylindrical annulus nationallicence thermal convection nationallicence radiogenic isotopes nationallicence fluid hoop nationallicence surface deformation nationallicence pure and applied geophysics Birkhäuser-Verlag 146/3-4(1996-09-01), 551-572 0033-4553 146:3-4<551 1996 146 24 https://doi.org/10.1007/BF00874733 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00874733 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Weinstein Stuart Department of Geology and Geophysics, SOEST, University of Hawaii, 96822, Honolulu, HI, USA aut NATIONALLICENCE 773 0- pure and applied geophysics Birkhäuser-Verlag 146/3-4(1996-09-01), 551-572 0033-4553 146:3-4<551 1996 146 24 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer