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Pb-isotopic evidence for rapid trench-parallel mantle flow beneath Vanuatu

Heyworth, Z; Knesel, Kurt Michael; Turner, Simon; Arculus, Richard

Description

Abstract: Recent geophysical and geochemical studies suggest that some subduction zones have a significant component of trench-parallel flow that is difficult to reconcile with conventional 2D corner-flow models. Mapping of different mantle Pb-isotopic signatures provides an opportunity to assess the role of along-strike flow beneath the Vanuatu region. Young back-arc spreading centres in the southern segment of the subduction zone have high 208Pb/ 204Pb for a given 206Pb/ 204Pb, similar to the...[Show more]

CollectionsANU Research Publications
Date published: 2011
Type: Journal article
URI: http://hdl.handle.net/1885/65802
Source: Journal of the Geological Society
DOI: 10.1144/0016-76492010-054

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