Insights into the dynamics of mantle plumes from uranium-series geochemistry
The long-standing paradigm that hotspot volcanoes such as Hawaii or Iceland represent the surface expression of mantle plumes - hot, buoyant upwelling regions beneath the Earth's lithosphere - has recently been the focus of controversy. Whether mantle plumes exist or not is pivotal for our unde...
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ftmacquarieunicr:oai:https://researchers.mq.edu.au:publications/5af3deb3-10e8-46a1-ad2a-b95589bbe9f5 2023-05-15T16:46:48+02:00 Insights into the dynamics of mantle plumes from uranium-series geochemistry Bourdon, Bernard Ribe, Neil M. Stracke, Andreas Saal, Alberto E. Turner, Simon P. 2006-12-07 https://researchers.mq.edu.au/en/publications/5af3deb3-10e8-46a1-ad2a-b95589bbe9f5 https://doi.org/10.1038/nature05341 http://www.scopus.com/inward/record.url?scp=33845672965&partnerID=8YFLogxK eng eng info:eu-repo/semantics/restrictedAccess Bourdon , B , Ribe , N M , Stracke , A , Saal , A E & Turner , S P 2006 , ' Insights into the dynamics of mantle plumes from uranium-series geochemistry ' , Nature , vol. 444 , no. 7120 , pp. 713-717 . https://doi.org/10.1038/nature05341 article 2006 ftmacquarieunicr https://doi.org/10.1038/nature05341 2022-11-06T06:38:16Z The long-standing paradigm that hotspot volcanoes such as Hawaii or Iceland represent the surface expression of mantle plumes - hot, buoyant upwelling regions beneath the Earth's lithosphere - has recently been the focus of controversy. Whether mantle plumes exist or not is pivotal for our understanding of the thermal, dynamic and compositional evolution of the Earth's mantle. Here we show that uranium-series disequilibria measured in hotspot lavas indicate that hotspots are indeed associated with hot and buoyant upwellings and that weaker (low buoyancy flux) hotspots such as Iceland and the Azores are characterized by lower excess temperatures than stronger hotspots such as Hawaii. This direct link between buoyancy flux and mantle temperature is evidence for the existence of mantle plumes. Article in Journal/Newspaper Iceland Macquarie University Research Portal Nature 444 7120 713 717 |
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Macquarie University Research Portal |
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ftmacquarieunicr |
language |
English |
description |
The long-standing paradigm that hotspot volcanoes such as Hawaii or Iceland represent the surface expression of mantle plumes - hot, buoyant upwelling regions beneath the Earth's lithosphere - has recently been the focus of controversy. Whether mantle plumes exist or not is pivotal for our understanding of the thermal, dynamic and compositional evolution of the Earth's mantle. Here we show that uranium-series disequilibria measured in hotspot lavas indicate that hotspots are indeed associated with hot and buoyant upwellings and that weaker (low buoyancy flux) hotspots such as Iceland and the Azores are characterized by lower excess temperatures than stronger hotspots such as Hawaii. This direct link between buoyancy flux and mantle temperature is evidence for the existence of mantle plumes. |
format |
Article in Journal/Newspaper |
author |
Bourdon, Bernard Ribe, Neil M. Stracke, Andreas Saal, Alberto E. Turner, Simon P. |
spellingShingle |
Bourdon, Bernard Ribe, Neil M. Stracke, Andreas Saal, Alberto E. Turner, Simon P. Insights into the dynamics of mantle plumes from uranium-series geochemistry |
author_facet |
Bourdon, Bernard Ribe, Neil M. Stracke, Andreas Saal, Alberto E. Turner, Simon P. |
author_sort |
Bourdon, Bernard |
title |
Insights into the dynamics of mantle plumes from uranium-series geochemistry |
title_short |
Insights into the dynamics of mantle plumes from uranium-series geochemistry |
title_full |
Insights into the dynamics of mantle plumes from uranium-series geochemistry |
title_fullStr |
Insights into the dynamics of mantle plumes from uranium-series geochemistry |
title_full_unstemmed |
Insights into the dynamics of mantle plumes from uranium-series geochemistry |
title_sort |
insights into the dynamics of mantle plumes from uranium-series geochemistry |
publishDate |
2006 |
url |
https://researchers.mq.edu.au/en/publications/5af3deb3-10e8-46a1-ad2a-b95589bbe9f5 https://doi.org/10.1038/nature05341 http://www.scopus.com/inward/record.url?scp=33845672965&partnerID=8YFLogxK |
genre |
Iceland |
genre_facet |
Iceland |
op_source |
Bourdon , B , Ribe , N M , Stracke , A , Saal , A E & Turner , S P 2006 , ' Insights into the dynamics of mantle plumes from uranium-series geochemistry ' , Nature , vol. 444 , no. 7120 , pp. 713-717 . https://doi.org/10.1038/nature05341 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1038/nature05341 |
container_title |
Nature |
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444 |
container_issue |
7120 |
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713 |
op_container_end_page |
717 |
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1766036895490375680 |