Coupling of thermal evolution and despinning of early Iapetus

Robuchon, G.; Choblet, G.; Tobie, G.; Čadek, O.; Sotin, C.; Grasset, O.

doi:10.1016/j.icarus.2009.12.002

Cited by 37 publications

(61 citation statements)

References 64 publications

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“…Let us note also, that our hypothesis does not require any special reological properties of the interior of Iapetus (compare e.g. Robuchon et al, 2010).…”

Section: The Model Of the Overturnmentioning

confidence: 89%

“…It is analogous to thermal convection when initial pattern consists of small downward currents (e.g. Robuchon et al, 2010).…”

Section: The Model Of the Overturnmentioning

confidence: 99%

“…doi:10.5047/eps.2012.12.008 vanced model of Robuchon et al (2010) further reduces the range of possible time of accretion and indicates that special Burgess rheology is necessary.…”

Section: Introductionmentioning

confidence: 99%

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Remarks on the Iapetus’ bulge and ridge

Czechowski

Leliwa-Kopystyński

2013

Earth Planet Sp

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Iapetus is a medium sized icy satellite of Saturn. It has two spectacular features: the equatorial ridge (ER) and the abnormally large flattening. The flattening is usually explained in terms of large non-hydrostatic fossil equatorial bulge (EB) supported by a thick lithosphere. Here we show, building on the principle of isostasy, that EB and ER could be a result of low density roots underlying the lithosphere below the equator. The low density matter formed the layer over the core of the satellite. Such situation was unstable. The instability led to origin of axially symmetric plumes that formed equatorial bulge and equatorial ridge. So, we explain both: EB and ER in the frame of one hypothesis.

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“…Let us note also, that our hypothesis does not require any special reological properties of the interior of Iapetus (compare e.g. Robuchon et al, 2010).…”

Section: The Model Of the Overturnmentioning

confidence: 89%

“…It is analogous to thermal convection when initial pattern consists of small downward currents (e.g. Robuchon et al, 2010).…”

Section: The Model Of the Overturnmentioning

confidence: 99%

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Remarks on the Iapetus’ bulge and ridge

Czechowski

Leliwa-Kopystyński

2013

Earth Planet Sp

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“…As described above, despite its convenience, the Maxwell model fails to account for planetary material anelasticity, which may be the main attenuation mechanism expressed at the forcing frequencies relevant to satellite tides. A few studies have also attempted to compare the dissipation obtained from various models: Maxwell body, Caputo model, SAS, and Burgers model (e.g., Wieczerkowski and Wolf 1998;Hussmann and Spohn 2004;Robuchon et al 2010). However, the latter models fail to describe the full range of viscoelastic behavior.…”

Section: Historical Approach To Tidal Dissipation Modeling In Planetamentioning

confidence: 99%

“…Such a possibility was demonstrated in the case of Iapetus with the application of a Four-Element model (Burgers) to account for the transient properties of the material (Robuchon et al 2010). However, that study fully decoupled transient and steady-state creep, which is inconsistent with experimental observations and theoretical considerations.…”

Section: Impact Of Anelasticity On the Tidal Response Of Icy Satellitesmentioning

confidence: 99%

Planetary Ices Attenuation Properties

McCarthy

Castillo‐Rogez

2012

Astrophysics and Space Science Library

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Lifting the cover of the cauldron: Convection in hot planets

Ricard

Labrosse

Dubuffet

2014

Geochem Geophys Geosyst

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Convection models of planetary mantles do not usually include a specific treatment of nearsurface dynamics. In all situations where surface dynamics is faster than internal dynamics, the lateral transport of material at the surface forbids the construction of a topography that could balance the internal convective stresses. This is the case if intense erosion erases the topography highs and fills in the depressions or if magma is transported through the lithosphere and spreads at the surface at large distances. In these cases, the usual boundary condition of numerical simulations, that the vertical velocity cancels at the surface should be replaced by a condition where the vertical flux on top of the convective mantle equilibrates that allowed by the surface dynamics. We show that this new boundary condition leads to the direct transport of heat to the surface and changes the internal convection that evolves toward a heat-pipe pattern. We discuss the transition between this extreme situation where heat is transported to the surface to the usual situation where heat diffuses through the lithosphere. This mechanism is much more efficient to cool a planet and might be the major cooling mechanism of young planets. Even the modest effect of material transport by erosion on Earth is not without effect on mantle convection and should affect the heat flow budget of our planet.

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Coupling of thermal evolution and despinning of early Iapetus

Cited by 37 publications

References 64 publications

Remarks on the Iapetus’ bulge and ridge

Remarks on the Iapetus’ bulge and ridge

Planetary Ices Attenuation Properties

Lifting the cover of the cauldron: Convection in hot planets

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