Seamounts and oceanic igneous features in the NE Atlantic: A link between plate motions and mantle dynamics
A new regional compilation of seamount-like oceanic igneous features (SOIFs) in the NE Atlantic points to three distinct oceanic areas of abundant seamount clusters. Seamounts on oceanic crust dated 54-50 Ma are formed on smooth oceanic basement, which resulted from high spreading rates and magmatic...
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ftqueensland:oai:eprints.qut.edu.au:231562 2024-02-04T10:00:52+01:00 Seamounts and oceanic igneous features in the NE Atlantic: A link between plate motions and mantle dynamics Gaina, Carmen Blischke, Anett Geissler, Wolfram H. Kimbell, Geoffrey S. Erlendsson, O. Gmundur 2017 application/pdf https://eprints.qut.edu.au/231562/ unknown Geological Society of London https://eprints.qut.edu.au/231562/1/419.full.pdf doi:10.1144/SP447.6 Gaina, Carmen, Blischke, Anett, Geissler, Wolfram H., Kimbell, Geoffrey S., & Erlendsson, O. Gmundur (2017) Seamounts and oceanic igneous features in the NE Atlantic: A link between plate motions and mantle dynamics. Geological Society Special Publication, 447(1), pp. 419-442. https://eprints.qut.edu.au/231562/ free_to_read http://creativecommons.org/licenses/by/4.0/ 2017 The Author(s). This work is covered by copyright. Unless the document is being made available under a Creative Commons Licence, you must assume that re-use is limited to personal use and that permission from the copyright owner must be obtained for all other uses. If the document is available under a Creative Commons License (or other specified license) then refer to the Licence for details of permitted re-use. It is a condition of access that users recognise and abide by the legal requirements associated with these rights. If you believe that this work infringes copyright please provide details by email to qut.copyright@qut.edu.au Geological Society Special Publication Contribution to Journal 2017 ftqueensland https://doi.org/10.1144/SP447.6 2024-01-09T00:07:43Z A new regional compilation of seamount-like oceanic igneous features (SOIFs) in the NE Atlantic points to three distinct oceanic areas of abundant seamount clusters. Seamounts on oceanic crust dated 54-50 Ma are formed on smooth oceanic basement, which resulted from high spreading rates and magmatic productivity enhanced by higher than usual mantle plume activity. Late Eocene-Early Miocene SOIF clusters are located close to newly formed tectonic features on rough oceanic crust in the Irminger, Iceland and Norway basins, reflecting an unstable tectonic regime prone to local readjustments of mid-ocean ridge and fracture zone segments accompanied by extra igneous activity. A SOIF population observed on Mid-Miocene-Present rough oceanic basement in the Greenland and Lofoten basins, and on conjugate Kolbeinsey Ridge flanks, coincides with an increase in spreading rate and magmatic productivity. We suggest that both tectonic/ kinematic and magmatic triggers produced Mid-Miocene-Present SOIFs, but the Early Miocene westwards ridge relocation may have played a role in delaying SOIF formation south of the Jan Mayen Fracture Zone. We conclude that Iceland plume episodic activity combined with regional changes in relative plate motion led to local mid-ocean ridge readjustments, which enhanced the likelihood of seamount formation. Article in Journal/Newspaper Greenland Iceland Jan Mayen Kolbeinsey Lofoten Queensland University of Technology: QUT ePrints Lofoten Greenland Norway Jan Mayen Kolbeinsey ENVELOPE(-18.687,-18.687,67.149,67.149) Kolbeinsey Ridge ENVELOPE(-16.917,-16.917,68.833,68.833) Jan Mayen Fracture Zone ENVELOPE(-8.000,-8.000,71.200,71.200) Geological Society, London, Special Publications 447 1 419 442 |
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Open Polar |
collection |
Queensland University of Technology: QUT ePrints |
op_collection_id |
ftqueensland |
language |
unknown |
description |
A new regional compilation of seamount-like oceanic igneous features (SOIFs) in the NE Atlantic points to three distinct oceanic areas of abundant seamount clusters. Seamounts on oceanic crust dated 54-50 Ma are formed on smooth oceanic basement, which resulted from high spreading rates and magmatic productivity enhanced by higher than usual mantle plume activity. Late Eocene-Early Miocene SOIF clusters are located close to newly formed tectonic features on rough oceanic crust in the Irminger, Iceland and Norway basins, reflecting an unstable tectonic regime prone to local readjustments of mid-ocean ridge and fracture zone segments accompanied by extra igneous activity. A SOIF population observed on Mid-Miocene-Present rough oceanic basement in the Greenland and Lofoten basins, and on conjugate Kolbeinsey Ridge flanks, coincides with an increase in spreading rate and magmatic productivity. We suggest that both tectonic/ kinematic and magmatic triggers produced Mid-Miocene-Present SOIFs, but the Early Miocene westwards ridge relocation may have played a role in delaying SOIF formation south of the Jan Mayen Fracture Zone. We conclude that Iceland plume episodic activity combined with regional changes in relative plate motion led to local mid-ocean ridge readjustments, which enhanced the likelihood of seamount formation. |
format |
Article in Journal/Newspaper |
author |
Gaina, Carmen Blischke, Anett Geissler, Wolfram H. Kimbell, Geoffrey S. Erlendsson, O. Gmundur |
spellingShingle |
Gaina, Carmen Blischke, Anett Geissler, Wolfram H. Kimbell, Geoffrey S. Erlendsson, O. Gmundur Seamounts and oceanic igneous features in the NE Atlantic: A link between plate motions and mantle dynamics |
author_facet |
Gaina, Carmen Blischke, Anett Geissler, Wolfram H. Kimbell, Geoffrey S. Erlendsson, O. Gmundur |
author_sort |
Gaina, Carmen |
title |
Seamounts and oceanic igneous features in the NE Atlantic: A link between plate motions and mantle dynamics |
title_short |
Seamounts and oceanic igneous features in the NE Atlantic: A link between plate motions and mantle dynamics |
title_full |
Seamounts and oceanic igneous features in the NE Atlantic: A link between plate motions and mantle dynamics |
title_fullStr |
Seamounts and oceanic igneous features in the NE Atlantic: A link between plate motions and mantle dynamics |
title_full_unstemmed |
Seamounts and oceanic igneous features in the NE Atlantic: A link between plate motions and mantle dynamics |
title_sort |
seamounts and oceanic igneous features in the ne atlantic: a link between plate motions and mantle dynamics |
publisher |
Geological Society of London |
publishDate |
2017 |
url |
https://eprints.qut.edu.au/231562/ |
long_lat |
ENVELOPE(-18.687,-18.687,67.149,67.149) ENVELOPE(-16.917,-16.917,68.833,68.833) ENVELOPE(-8.000,-8.000,71.200,71.200) |
geographic |
Lofoten Greenland Norway Jan Mayen Kolbeinsey Kolbeinsey Ridge Jan Mayen Fracture Zone |
geographic_facet |
Lofoten Greenland Norway Jan Mayen Kolbeinsey Kolbeinsey Ridge Jan Mayen Fracture Zone |
genre |
Greenland Iceland Jan Mayen Kolbeinsey Lofoten |
genre_facet |
Greenland Iceland Jan Mayen Kolbeinsey Lofoten |
op_source |
Geological Society Special Publication |
op_relation |
https://eprints.qut.edu.au/231562/1/419.full.pdf doi:10.1144/SP447.6 Gaina, Carmen, Blischke, Anett, Geissler, Wolfram H., Kimbell, Geoffrey S., & Erlendsson, O. Gmundur (2017) Seamounts and oceanic igneous features in the NE Atlantic: A link between plate motions and mantle dynamics. Geological Society Special Publication, 447(1), pp. 419-442. https://eprints.qut.edu.au/231562/ |
op_rights |
free_to_read http://creativecommons.org/licenses/by/4.0/ 2017 The Author(s). This work is covered by copyright. Unless the document is being made available under a Creative Commons Licence, you must assume that re-use is limited to personal use and that permission from the copyright owner must be obtained for all other uses. If the document is available under a Creative Commons License (or other specified license) then refer to the Licence for details of permitted re-use. It is a condition of access that users recognise and abide by the legal requirements associated with these rights. If you believe that this work infringes copyright please provide details by email to qut.copyright@qut.edu.au |
op_doi |
https://doi.org/10.1144/SP447.6 |
container_title |
Geological Society, London, Special Publications |
container_volume |
447 |
container_issue |
1 |
container_start_page |
419 |
op_container_end_page |
442 |
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1789966385014636544 |