Stirring in three-dimensional mantle convection models and implications for geochemistry: Passive tracers
Numerical three-dimensional spherical models of stirring of passive tracers in a convective mantle incorporating plate tectonics, taking account of faster mantle overturning in the past and scaling the model to the Earth, show that the mean ages of MORB and OIB samples obtained from the models are ∼1.7 Ga for a 4.5 Ga Earth, close to the observed apparent lead isotopic age of ∼1.8 Ga. Only ∼3% of the mantle remains unprocessed. The processing time, which is the time for a mass equivalent to...[Show more]
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|Source:||Geochemistry, Geophysics, Geosystems. G3|
|01_Huang_Stirring_in_three-dimensional_2007.pdf||697.89 kB||Adobe PDF||Request a copy|
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