Skip to content

The initiation of segmented buoyancy driven melting during continental breakup

Research output: Contribution to journalArticle

Original languageEnglish
Article number13110
Number of pages9
JournalNature Communications
Volume7
DOIs
DateAccepted/In press - 26 Aug 2016
DatePublished (current) - 18 Oct 2016

Abstract

Melting of the mantle during continental breakup leads to magmatic intrusion and volcanism, yet our understanding of the location and dominant mechanisms of melt generation in rifting environments is impeded by a paucity of direct observations of mantle melting. It is unclear when during the rifting process the segmented nature of magma supply typical of seafloor spreading initiates. We use Rayleigh-wave tomography to construct the first high-resolution absolute 3-dimensional shear-wave velocity model of the upper 250 kilometres beneath the Afar triple junction, imaging the mantle response during progressive continental breakup. Our model suggests melt production is highest and melting depths deepest early during continental breakup. Elevated melt production during continental rifting is likely due to localised thinning and melt focusing when the rift is narrow. Additionally, we interpret segmented zones of melt supply beneath the rift, suggesting that buoyancy driven active upwelling of the mantle initiates early during continental rifting.

    Research areas

  • Seismology, Tectonics

Download statistics

No data available

Documents

Documents

  • Full-text PDF (final published version)

    Rights statement: This is the final published version of the article (version of record). It first appeared online via Nature at http://www.nature.com/articles/ncomms13110. Please refer to any applicable terms of use of the publisher.

    Final published version, 937 KB, PDF document

    Licence: CC BY

DOI

View research connections

Related faculties, schools or groups