Reconciling dynamic and seismic models of Earth's lower mantle: The dominant role of thermal heterogeneity
Two large low-shear-velocity provinces (LLSVPs) in the deep mantle beneath Africa and the Pacific are generally interpreted as hot but chemically dense 'piles', which have remained isolated from mantle circulation for several hundred million years. This interpretation largely hinges on four seismic observations: (i) their shear wave velocity anomalies are considered too large for purely thermal structures; (ii) shear wave velocity gradients at their edges are sharp; (iii) their shear to...[Show more]
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|Source:||Earth and Planetary Science Letters|
|01_Davies_Reconciling_dynamic_and_2012.pdf||2.37 MB||Adobe PDF||Request a copy|
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