How and when plume zonation appeared during the 132 Myr evolution of the Tristan Hotspot
Increasingly, spatial geochemical zonation, present as geographically distinct, subparallel trends, is observed along hotspot tracks, such as Hawaii and the Galapagos. The origin of this zonation is currently unclear. Recently zonation was found along the last ∼70 Myr of the Tristan-Gough hotspot tr...
Autores principales: | , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
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Nature Pub. Group
2015
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4525177/ https://www.ncbi.nlm.nih.gov/pubmed/26213112 http://dx.doi.org/10.1038/ncomms8799 |
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author | Hoernle, Kaj Rohde, Joana Hauff, Folkmar Garbe-Schönberg, Dieter Homrighausen, Stephan Werner, Reinhard Morgan, Jason P. |
author_facet | Hoernle, Kaj Rohde, Joana Hauff, Folkmar Garbe-Schönberg, Dieter Homrighausen, Stephan Werner, Reinhard Morgan, Jason P. |
author_sort | Hoernle, Kaj |
collection | PubMed |
description | Increasingly, spatial geochemical zonation, present as geographically distinct, subparallel trends, is observed along hotspot tracks, such as Hawaii and the Galapagos. The origin of this zonation is currently unclear. Recently zonation was found along the last ∼70 Myr of the Tristan-Gough hotspot track. Here we present new Sr–Nd–Pb–Hf isotope data from the older parts of this hotspot track (Walvis Ridge and Rio Grande Rise) and re-evaluate published data from the Etendeka and Parana flood basalts erupted at the initiation of the hotspot track. We show that only the enriched Gough, but not the less-enriched Tristan, component is present in the earlier (70–132 Ma) history of the hotspot. Here we present a model that can explain the temporal evolution and origin of plume zonation for both the Tristan-Gough and Hawaiian hotspots, two end member types of zoned plumes, through processes taking place in the plume sources at the base of the lower mantle. |
format | Online Article Text |
id | pubmed-4525177 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2015 |
publisher | Nature Pub. Group |
record_format | MEDLINE/PubMed |
spelling | pubmed-45251772015-09-04 How and when plume zonation appeared during the 132 Myr evolution of the Tristan Hotspot Hoernle, Kaj Rohde, Joana Hauff, Folkmar Garbe-Schönberg, Dieter Homrighausen, Stephan Werner, Reinhard Morgan, Jason P. Nat Commun Article Increasingly, spatial geochemical zonation, present as geographically distinct, subparallel trends, is observed along hotspot tracks, such as Hawaii and the Galapagos. The origin of this zonation is currently unclear. Recently zonation was found along the last ∼70 Myr of the Tristan-Gough hotspot track. Here we present new Sr–Nd–Pb–Hf isotope data from the older parts of this hotspot track (Walvis Ridge and Rio Grande Rise) and re-evaluate published data from the Etendeka and Parana flood basalts erupted at the initiation of the hotspot track. We show that only the enriched Gough, but not the less-enriched Tristan, component is present in the earlier (70–132 Ma) history of the hotspot. Here we present a model that can explain the temporal evolution and origin of plume zonation for both the Tristan-Gough and Hawaiian hotspots, two end member types of zoned plumes, through processes taking place in the plume sources at the base of the lower mantle. Nature Pub. Group 2015-07-27 /pmc/articles/PMC4525177/ /pubmed/26213112 http://dx.doi.org/10.1038/ncomms8799 Text en Copyright © 2015, Nature Publishing Group, a division of Macmillan Publishers Limited. All Rights Reserved. http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article's Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ |
spellingShingle | Article Hoernle, Kaj Rohde, Joana Hauff, Folkmar Garbe-Schönberg, Dieter Homrighausen, Stephan Werner, Reinhard Morgan, Jason P. How and when plume zonation appeared during the 132 Myr evolution of the Tristan Hotspot |
title | How and when plume zonation appeared during the 132 Myr evolution of the Tristan Hotspot |
title_full | How and when plume zonation appeared during the 132 Myr evolution of the Tristan Hotspot |
title_fullStr | How and when plume zonation appeared during the 132 Myr evolution of the Tristan Hotspot |
title_full_unstemmed | How and when plume zonation appeared during the 132 Myr evolution of the Tristan Hotspot |
title_short | How and when plume zonation appeared during the 132 Myr evolution of the Tristan Hotspot |
title_sort | how and when plume zonation appeared during the 132 myr evolution of the tristan hotspot |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4525177/ https://www.ncbi.nlm.nih.gov/pubmed/26213112 http://dx.doi.org/10.1038/ncomms8799 |
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