The tilted Iceland Plume and its effect on the North Atlantic evolution and magmatism
Iceland and the encompassing Northeast Atlantic are characterized by abun- dant volcanism, anomalously high topography and, in many places, anoma- lously thick basaltic crust. This has been attributed to the Iceland Plume, rising from the deep mantle, though its structure and very existence are de-...
Main Authors: | , , , |
---|---|
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
2021
|
Subjects: | |
Online Access: | https://dair.dias.ie/id/eprint/1129/ https://dair.dias.ie/id/eprint/1129/1/Main_text.pdf |
id |
ftdublininstadvs:oai:dair.dias.ie:1129 |
---|---|
record_format |
openpolar |
spelling |
ftdublininstadvs:oai:dair.dias.ie:1129 2023-05-15T16:27:01+02:00 The tilted Iceland Plume and its effect on the North Atlantic evolution and magmatism Celli, Nicolas Luca Lebedev, Sergei Schaeffer, Andrew J. Gaina, Carmen 2021 text https://dair.dias.ie/id/eprint/1129/ https://dair.dias.ie/id/eprint/1129/1/Main_text.pdf en eng https://dair.dias.ie/id/eprint/1129/1/Main_text.pdf Celli, Nicolas Luca and Lebedev, Sergei and Schaeffer, Andrew J. and Gaina, Carmen (2021) The tilted Iceland Plume and its effect on the North Atlantic evolution and magmatism. (Preprint) Article PeerReviewed 2021 ftdublininstadvs 2022-12-15T23:59:50Z Iceland and the encompassing Northeast Atlantic are characterized by abun- dant volcanism, anomalously high topography and, in many places, anoma- lously thick basaltic crust. This has been attributed to the Iceland Plume, rising from the deep mantle, though its structure and very existence are de- bated. Using seismic waveform tomography with massive datasets, we compute a new, detailed model of the crust and upper mantle beneath Iceland and the surrounding North Atlantic region. The model reveals a large, low-velocity anomaly, indicative of high temperatures, at 400-660 kilometers depth beneath eastern Greenland, where seismic receiver functions also indicate an extensive high-temperature region. The anomaly rises upwards and eastwards toward Ice- land, deflecting around the thick lithosphere of Greenland’s cratons, which we also image in detail. We interpret the major low-velocity anomaly as the Ice- land Plume, ascending from under Greenland and captured by the Mid-Atlantic Ridge. The ascent of the plume beneath the western Northeast Atlantic is con- sistent with its thin lithosphere, documented by our tomography, and abundant seamounts. Our results reconcile previously contrasting views on the structure of the Iceland Plume: while the plume is clearly visible in the transition zone beneath Greenland, it is confined to the upper mantle beneath Iceland. Article in Journal/Newspaper Greenland Iceland North Atlantic Northeast Atlantic Dublin Institute for Advanced Studies: DIAS Institutional Repository Greenland Mid-Atlantic Ridge |
institution |
Open Polar |
collection |
Dublin Institute for Advanced Studies: DIAS Institutional Repository |
op_collection_id |
ftdublininstadvs |
language |
English |
description |
Iceland and the encompassing Northeast Atlantic are characterized by abun- dant volcanism, anomalously high topography and, in many places, anoma- lously thick basaltic crust. This has been attributed to the Iceland Plume, rising from the deep mantle, though its structure and very existence are de- bated. Using seismic waveform tomography with massive datasets, we compute a new, detailed model of the crust and upper mantle beneath Iceland and the surrounding North Atlantic region. The model reveals a large, low-velocity anomaly, indicative of high temperatures, at 400-660 kilometers depth beneath eastern Greenland, where seismic receiver functions also indicate an extensive high-temperature region. The anomaly rises upwards and eastwards toward Ice- land, deflecting around the thick lithosphere of Greenland’s cratons, which we also image in detail. We interpret the major low-velocity anomaly as the Ice- land Plume, ascending from under Greenland and captured by the Mid-Atlantic Ridge. The ascent of the plume beneath the western Northeast Atlantic is con- sistent with its thin lithosphere, documented by our tomography, and abundant seamounts. Our results reconcile previously contrasting views on the structure of the Iceland Plume: while the plume is clearly visible in the transition zone beneath Greenland, it is confined to the upper mantle beneath Iceland. |
format |
Article in Journal/Newspaper |
author |
Celli, Nicolas Luca Lebedev, Sergei Schaeffer, Andrew J. Gaina, Carmen |
spellingShingle |
Celli, Nicolas Luca Lebedev, Sergei Schaeffer, Andrew J. Gaina, Carmen The tilted Iceland Plume and its effect on the North Atlantic evolution and magmatism |
author_facet |
Celli, Nicolas Luca Lebedev, Sergei Schaeffer, Andrew J. Gaina, Carmen |
author_sort |
Celli, Nicolas Luca |
title |
The tilted Iceland Plume and its effect on the North Atlantic evolution and magmatism |
title_short |
The tilted Iceland Plume and its effect on the North Atlantic evolution and magmatism |
title_full |
The tilted Iceland Plume and its effect on the North Atlantic evolution and magmatism |
title_fullStr |
The tilted Iceland Plume and its effect on the North Atlantic evolution and magmatism |
title_full_unstemmed |
The tilted Iceland Plume and its effect on the North Atlantic evolution and magmatism |
title_sort |
tilted iceland plume and its effect on the north atlantic evolution and magmatism |
publishDate |
2021 |
url |
https://dair.dias.ie/id/eprint/1129/ https://dair.dias.ie/id/eprint/1129/1/Main_text.pdf |
geographic |
Greenland Mid-Atlantic Ridge |
geographic_facet |
Greenland Mid-Atlantic Ridge |
genre |
Greenland Iceland North Atlantic Northeast Atlantic |
genre_facet |
Greenland Iceland North Atlantic Northeast Atlantic |
op_relation |
https://dair.dias.ie/id/eprint/1129/1/Main_text.pdf Celli, Nicolas Luca and Lebedev, Sergei and Schaeffer, Andrew J. and Gaina, Carmen (2021) The tilted Iceland Plume and its effect on the North Atlantic evolution and magmatism. (Preprint) |
_version_ |
1766016057213976576 |