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Reconciling dynamic and seismic models of Earth's lower mantle: The dominant role of thermal heterogeneity

Davies, Rhodri; Goes, Saskia; Davies, J; Schuberth, B.S.A.; Bunge, Hans-Peter; Ritsema, Gerard J.M.

Description

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]

CollectionsANU Research Publications
Date published: 2012
Type: Journal article
URI: http://hdl.handle.net/1885/65012
Source: Earth and Planetary Science Letters
DOI: 10.1016/j.epsl.2012.08.016

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