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Stirring geochemistry in mantle convection models with stiff plates and slabs

Davies, Geoffrey


Numerical models of mantle convection are presented that readily yield midocean ridge basalt (MORB) and oceanic island basalt (OIB) ages equaling or exceeding the apparent ~1.8-Ga lead isotopic ages of trace-element heterogeneities in the mantle. These models feature high-viscosity surface plates and subducting lithosphere, and higher viscosities in the lower mantle. The formation and subduction of oceanic crust are simulated by means of tracers that represent a basaltic component. The models...[Show more]

CollectionsANU Research Publications
Date published: 2002
Type: Journal article
Source: Geochimica et Cosmochimica Acta
DOI: 10.1016/S0016-7037(02)00915-8


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