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Stagnant lid convection in the mid-sized icy satellites of Saturn

Multhaup, Kai and Spohn, Tilman (2007) Stagnant lid convection in the mid-sized icy satellites of Saturn. Icarus, 186 (2), pp. 420-435. DOI: 10.1016/j.icarus.2006.09.001.

Full text not available from this repository.

Abstract

Thermal history models for the mid-sized saturnian satellites Mimas, Tethys, Dione, Iapetus, and Rhea have been calculated assuming stagnant lid convection in undifferentiated satellites and varying parameter values over broad ranges. Of all five satellites under consideration, only Dione, Rhea and Iapetus do show significant internal activities related to convective overturn for extended periods of time. The interiors of Mimas and Tethys do not convect or do so only for brief periods of time early in their thermal histories. Although we use lower densities than previous models, our calculations suggest higher interior temperatures but also thicker rigid shells above the convecting regions. Temperatures in the stagnant lid will allow melting of ammonia-dihydrate. Dione, Rhea and Iapetus may differentiate early and form early oceans, Iapetus only if ammonia is present. Mimas and Tethys with ammonia may differentiate if they accreted in an optically thick nebula with ambient temperatures around 250 K. Our models suggest that the outer shells of the satellites are largely primordial in composition even if the satellites differentiated. In these cases the deep interior may be layered with a pure ice shell underlain by an ammonia dihydrate layer and a rock core.

Document Type:Article
Title:Stagnant lid convection in the mid-sized icy satellites of Saturn
Authors:
AuthorsInstitution or Email of Authors
Multhaup, KaiInstitut für Planetologie, Westfälische Wilhelms-Universität, Münster, Germany
Spohn, TilmanUNSPECIFIED
Date:2007
Journal or Publication Title:Icarus
Refereed publication:Yes
In ISI Web of Science:Yes
Volume:186
DOI:10.1016/j.icarus.2006.09.001
Page Range:pp. 420-435
Status:Published
Keywords:Icy Satellites, Saturn, Thermal Evolution, Convection, Stagnant-lid
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W EW - Erforschung des Weltraums
DLR - Research area:Space
DLR - Program:W EW - Erforschung des Weltraums
DLR - Research theme (Project):W - Vorhaben Vergleichende Planetologie (old)
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Planetary Physics
Institute of Planetary Research
Deposited By: Judit Jänchen
Deposited On:26 Jul 2007
Last Modified:27 Apr 2009 14:08

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