Seismic Imaging of Thickened Lithosphere Resulting From Plume Pulsing Beneath Iceland
Ocean plates conductively cool and subside with seafloor age. Plate thickening with age is also predicted, and hot spots may cause thinning. However, both are debated and depend on the way the plate is defined. Determining the thickness of the plates along with the process that governs it has proven...
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ftpubmed:oai:pubmedcentral.nih.gov:6108382 2023-05-15T16:47:24+02:00 Seismic Imaging of Thickened Lithosphere Resulting From Plume Pulsing Beneath Iceland Rychert, Catherine A. Harmon, Nicholas Armitage, John J. 2018-06-22 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6108382/ https://doi.org/10.1029/2018GC007501 en eng John Wiley and Sons Inc. http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6108382/ http://dx.doi.org/10.1029/2018GC007501 © 2018. The Authors. This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. CC-BY Research Articles Text 2018 ftpubmed https://doi.org/10.1029/2018GC007501 2018-09-02T00:50:09Z Ocean plates conductively cool and subside with seafloor age. Plate thickening with age is also predicted, and hot spots may cause thinning. However, both are debated and depend on the way the plate is defined. Determining the thickness of the plates along with the process that governs it has proven challenging. We use S‐to‐P (Sp) receiver functions to image a strong, persistent LAB beneath Iceland where the mid‐Atlantic Ridge interacts with a plume with hypothesized pulsating thermal anomaly. The plate is thickest, up to 84 ± 6 km, beneath lithosphere formed during times of hypothesized hotter plume temperatures and as thin as 61 ± 6 km beneath regions formed during colder intervals. We performed geodynamic modeling to show that these plate thicknesses are inconsistent with a thermal lithosphere. Instead, periods of increased plume temperatures likely increased the melting depth, causing deeper depletion and dehydration, and creating a thicker plate. This suggests plate thickness is dictated by the conditions of plate formation. Text Iceland PubMed Central (PMC) Mid-Atlantic Ridge Geochemistry, Geophysics, Geosystems 19 6 1789 1799 |
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Research Articles |
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Research Articles Rychert, Catherine A. Harmon, Nicholas Armitage, John J. Seismic Imaging of Thickened Lithosphere Resulting From Plume Pulsing Beneath Iceland |
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Research Articles |
description |
Ocean plates conductively cool and subside with seafloor age. Plate thickening with age is also predicted, and hot spots may cause thinning. However, both are debated and depend on the way the plate is defined. Determining the thickness of the plates along with the process that governs it has proven challenging. We use S‐to‐P (Sp) receiver functions to image a strong, persistent LAB beneath Iceland where the mid‐Atlantic Ridge interacts with a plume with hypothesized pulsating thermal anomaly. The plate is thickest, up to 84 ± 6 km, beneath lithosphere formed during times of hypothesized hotter plume temperatures and as thin as 61 ± 6 km beneath regions formed during colder intervals. We performed geodynamic modeling to show that these plate thicknesses are inconsistent with a thermal lithosphere. Instead, periods of increased plume temperatures likely increased the melting depth, causing deeper depletion and dehydration, and creating a thicker plate. This suggests plate thickness is dictated by the conditions of plate formation. |
format |
Text |
author |
Rychert, Catherine A. Harmon, Nicholas Armitage, John J. |
author_facet |
Rychert, Catherine A. Harmon, Nicholas Armitage, John J. |
author_sort |
Rychert, Catherine A. |
title |
Seismic Imaging of Thickened Lithosphere Resulting From Plume Pulsing Beneath Iceland |
title_short |
Seismic Imaging of Thickened Lithosphere Resulting From Plume Pulsing Beneath Iceland |
title_full |
Seismic Imaging of Thickened Lithosphere Resulting From Plume Pulsing Beneath Iceland |
title_fullStr |
Seismic Imaging of Thickened Lithosphere Resulting From Plume Pulsing Beneath Iceland |
title_full_unstemmed |
Seismic Imaging of Thickened Lithosphere Resulting From Plume Pulsing Beneath Iceland |
title_sort |
seismic imaging of thickened lithosphere resulting from plume pulsing beneath iceland |
publisher |
John Wiley and Sons Inc. |
publishDate |
2018 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6108382/ https://doi.org/10.1029/2018GC007501 |
geographic |
Mid-Atlantic Ridge |
geographic_facet |
Mid-Atlantic Ridge |
genre |
Iceland |
genre_facet |
Iceland |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6108382/ http://dx.doi.org/10.1029/2018GC007501 |
op_rights |
© 2018. The Authors. This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1029/2018GC007501 |
container_title |
Geochemistry, Geophysics, Geosystems |
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19 |
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6 |
container_start_page |
1789 |
op_container_end_page |
1799 |
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1766037486614609920 |