Effect of bridgmanite-ferropericlase grain size evolution on earth’s average mantle viscosity: implications for mantle convection in early and present-day earth

HIGHLIGHTS

• What: The authors develop self-consistent 2-D spherical half-annulus geodynamic models of Earth`s evolution using the finite volume code StagYY to assess the role of grain size on lower mantle viscosity. The authors explore several models with and without grain size evolution to compare their effects on mantle viscosity. The authors compare the results with different growth parameters in the lower mantle and quantitatively assess their impact on mantle rheology and creep mechanisms, ultimately shedding light onto lower mantle dynamics. The authors examine different radial profiles, such as average temperature, viscosity and deformation mechanism . . .
  

   

  

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