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Hotspot trails in the South Atlantic controlled by plume and plate tectonic processes

O'Connor, John; Jokat, Wilfried; le Roex, Anton; Class, Cornelia; Wijbrans, Jan; Kebling, Stephanie; Kuiper, Klaudia; Nebel, Oliver

Description

The origin of hotspot trails is controversial. Explanations range from deep mantle plumes rising from the core-mantle boundary (CMB) to shallow plate cracking. However, these mechanisms cannot explain uniquely the scattered hotspot trails distributed across a 2,000-km-wide swell in the sea floor of the southeast Atlantic Ocean. This swell projects down to one of the two largest and deepest distinct regions at the CMB, the Africa Low Shear Wave Velocity Province. Here we use 40 Ar/ 39 Ar...[Show more]

CollectionsANU Research Publications
Date published: 2012
Type: Journal article
URI: http://hdl.handle.net/1885/67112
Source: Nature Geoscience
DOI: 10.1038/ngeo1583

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