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Stirring in three-dimensional mantle convection models and implications for geochemistry: 2. Heavy tracers

Huang, Jinshui; Davies, Geoffrey

Description

Three-dimensional, spherical models of subduction and stirring of oceanic crust, taking account of the excess density of subducted oceanic crust in the mantle, confirm the main results from previous twodimensional models. Thus we find that the excess density of subducted crust significantly increases the ages of ocean island basalt (OIB) samples, assumed to come from the bottom 100 km of the mantle, but has little influence on the age of mid-ocean ridge basalt (MORB) samples from the top of the...[Show more]

CollectionsANU Research Publications
Date published: 2007
Type: Journal article
URI: http://hdl.handle.net/1885/19442
Source: Geochemistry, Geophysics, Geosystems. G3
DOI: 10.1029/2007GC001621

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