Mantle convection drives plate tectonics, redistributes heat, cycles chemical species, and generates dynamic topography at the Earth’s surface. Constraining spatio-temporal changes in the thermochemical structure of the mantle will help to refine our understanding of these interlinked phenomena. This signi...
c, The RMSE of the modelled vs observed polar motion series for different combinations of processes (B-SL: barystatic and sea-level; GIA-MC: GIA and mantle convection; CD: core dynamics; and EQ seismic). The red dashed line indicates the mean error of the observed polar motion. The ...
AI generated definition based on:Earth-Science Reviews,2015 Discover other topics Chapters and Articles You might find these chapters and articles relevant to this topic. Energetics of the Solid Earth: Implications for the Structure of Mantle Convection ...
Plate tectonicswere even less efficient in subducting thicker crust when the mantle was hotter than in the example. This implies that convection within the partially molten mush carried heat to the surface. The next section considers this epoch. ...
Abstract Chapter 8 begins with a discussion of plate tectonics. Then the study of convection in the Earth’s mantle is introduced by the consideration of Rayleigh–Bénard convection with constant viscosity. Linear and nonlinear stability are discussed, and the formation of planforms, and then the...
The viscosity stratification has a strong influence on the thermal evolution of a compressible Earth’s mantle with time-dependent internal heating. The differential equations for infinite Prandtl-number convection are solved using a three-dimensional...
mantle convectiongeodynamicsocean island basaltsgeochemistryIn order to link the geochemical signature of hot spot basalts to Earth's deep interior, it is first necessary to understand how plumes sample different regions of the mantle. Here, we investigate the relative amounts of deep and shallow ...
the later degassing occurs. The outgassing lag for increasing planetary mass is due to the larger internal pressure which produces a higher mantle viscosity. The rheology variation reduces the vigor of mantle convection so that outgassing starts later compared to planets with lower mass (Fig.2). ...
mantle convectionmantle plumesocean island basaltsIn order to link the geochemical signature of hot spot basalts to Earth's deep interior, it is first necessary to understand how plumes sample different regions of the mantle. Here, we investigate the relative amounts of deep and shallow mantle ...
theoretical arguments have to be adopted. One such argument is to employ a numerical model of the Earth's thermal evolution and predict the CMB heat flow through time. Models can be either relatively simple parameterized convection calculations (e.g.,Nimmo et al., 2004) or more sophisticated ...