Scaling of plate-tectonic convection with pseudoplastic rheology

@article{Korenaga2010ScalingOP,
  title={Scaling of plate-tectonic convection with pseudoplastic rheology},
  author={Jun Korenaga},
  journal={arXiv: Geophysics},
  year={2010}
}
  • J. Korenaga
  • Published 27 August 2010
  • Geology, Physics
  • arXiv: Geophysics
The scaling of plate-tectonic convection is investigated by simulating thermal convection with pseudoplastic rheology and strongly temperature-dependent viscosity. The effect of mantle melting is also explored with additional depth-dependent viscosity. Heat-flow scaling can be constructed with only two parameters, the internal Rayleigh number and the lithospheric viscosity contrast, the latter of which is determined entirely by rheological properties. The critical viscosity contrast for the… 

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References

SHOWING 1-10 OF 86 REFERENCES
Scaling of stagnant-lid convection with Arrhenius rheology and the effects of mantle melting
SUMMARY On the basis of numerical modelling and scaling analysis, a few modifications are proposed for the scaling of stagnant-lid convection, in order to make it more applicable to the thermal
The effect of rheological parameters on plate behaviour in a self-consistent model of mantle convection
Abstract In a three-dimensional numerical model of mantle convection we have explored the self-consistent formation and evolution of plates. This was done by investigating the influence of
Mantle convection with a brittle lithosphere: thoughts on the global tectonic styles of the Earth and Venus
SUMMARY Plates are an integral part of the convection system in the fluid mantle, but plate boundaries are the product of brittle faulting and plate motions are strongly influenced by the existence
Generation of plate‐like behavior and mantle heterogeneity from a spherical, viscoplastic convection model
[1] How plate tectonics arises from mantle convection is a question that has only very recently become feasible to address with spherical, viscoplastic computations. We present mainly internally
Thermal cracking and the deep hydration of oceanic lithosphere: A key to the generation of plate tectonics?
[1] The development of transient thermal stress in suboceanic mantle is investigated on the basis of two-dimensional thermoviscoelastic models incorporating composite rheology appropriate for dry
The generation of plate tectonics from mantle convection
Abstract In the last decade, significant progress has been made toward understanding how plate tectonics is generated from mantle dynamics. A primary goal of plate-generation studies has been the
Effect of plate bending on the Urey ratio and the thermal evolution of the mantle
Abstract The bending of tectonic plates as they subduct causes resistance to plate motions and mantle convection. It has been proposed that this effect could keep plate velocities relatively constant
Physics of multiscale convection in Earth's mantle: Evolution of sublithospheric convection
[1] We investigate the physics of multiscale convection in Earth's mantle, characterized by the coexistence of large-scale mantle circulation associated with plate tectonics and small-scale
Thermal convection with non-Newtonian plates
SUMMARY The coupling between plate motions and mantle convection is investigated using a fully dynamic numerical model consisting of a thin non-Newtonian layer which is dynamically coupled to a thick
The interaction of a subducting lithospheric slab with a chemical or phase boundary
We have used a finite element model of time-dependent convection to determine the conditions for penetration of the subducted plate into the lower mantle. A temperature-dependent and non-Newtonian
...
1
2
3
4
5
...