Transient mantle layering and the episodic behaviour of Venus due to the 'basalt barrier' mechanism
Numerical models of mantle convection that include the 'basalt barrier' mechanism are explored for Venus. The 'basalt barrier' mechanism is due to the positive buoyancy of subducted basaltic crust between the mantle depths of 660 and 750. km. The inclusion of this mechanism in models of Earth's evolution has been shown to cause episodic mantle layering early in Earth history and we explore whether it can also operate on Venus. The models presented here include a moderately mobile lithosphere,...[Show more]
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