Mantle convection is buoyancy-driven motion in a rocky planetary mantle. Heating and cooling create density differences; chemical and mineral-phase differences can also affect buoyancy. Although the mantle is mostly solid, deformation by material creep permits slow flow over geological time.
A simple model balances viscous resistance with buoyancy and transports heat by both flow and thermal conduction. Its Rayleigh number compares those effects. Temperature-dependent mantle viscosity and the strength of the lithosphere help determine whether the surface moves as plates or remains a stagnant lid. Seismic structure, surface deformation and heat flux constrain different parts of this model.
Mantle convection is the process by which heat from the Earth's interior causes the movement of the semi-fluid mantle layer, which lies between the Earth's crust and the outer core. This process is a key mechanism in plate tectonics, influencing the movement of tectonic plates on the Earth's surface. Here’s how mantle convection works: 1. **Heat Production**: The Earth's interior generates heat through radioactive decay and residual heat from the planet’s formation.
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