Evolution of Labrador Sea–Baffin Bay : plate or plume processes?
Breakup between Greenland and Canada resulted in oceanic spreading in the Labrador Sea and Baffin Bay. These ocean basins are connected through the Davis Strait, a bathymetric high comprising primarily continental lithosphere, and the focus of the West Greenland Tertiary volcanic province. It has be...
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Geological Association of Canada
2017
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Online Access: | http://dro.dur.ac.uk/23284/ http://dro.dur.ac.uk/23284/1/23284.pdf https://doi.org/10.12789/geocanj.2017.44.120 https://journals.lib.unb.ca/index.php/GC/article/view/25636 |
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ftunivdurham:oai:dro.dur.ac.uk.OAI2:23284 2023-05-15T15:34:58+02:00 Evolution of Labrador Sea–Baffin Bay : plate or plume processes? Peace, Alexander L. Foulger, Gillian R. Schiffer, Christian McCaffrey, Ken J.W. 2017-10-06 application/pdf http://dro.dur.ac.uk/23284/ http://dro.dur.ac.uk/23284/1/23284.pdf https://doi.org/10.12789/geocanj.2017.44.120 https://journals.lib.unb.ca/index.php/GC/article/view/25636 unknown Geological Association of Canada dro:23284 issn:1911-4850 doi:10.12789/geocanj.2017.44.120 http://dro.dur.ac.uk/23284/ https://journals.lib.unb.ca/index.php/GC/article/view/25636 http://dro.dur.ac.uk/23284/1/23284.pdf Geoscience Canada, 2017, Vol.44(3), pp.91-102 [Peer Reviewed Journal] Article PeerReviewed 2017 ftunivdurham https://doi.org/10.12789/geocanj.2017.44.120 2020-05-28T22:36:05Z Breakup between Greenland and Canada resulted in oceanic spreading in the Labrador Sea and Baffin Bay. These ocean basins are connected through the Davis Strait, a bathymetric high comprising primarily continental lithosphere, and the focus of the West Greenland Tertiary volcanic province. It has been suggested that a mantle plume facilitated this breakup and generated the associated magmatism. Plume-driven breakup predicts that the earliest, most extensive rifting, magmatism and initial seafloor spreading starts in the same locality, where the postulated plume impinged. Observations from the Labrador Sea–Baffin Bay area do not accord with these predictions. Thus, the plume hypothesis is not confirmed at this locality unless major ad hoc variants are accepted. A model that fits the observations better involves a thick continental lithospheric keel of orogenic origin beneath the Davis Strait that blocked the northward-propagating Labrador Sea rift resulting in locally enhanced magmatism. The Davis Strait lithosphere was thicker and more resilient to rifting because the adjacent Paleoproterozoic Nagssugtoqidian and Torngat orogenic belts contain structures unfavourably orientated with respect to the extensional stress field at the time. Article in Journal/Newspaper Baffin Bay Baffin Bay Baffin Davis Strait Greenland Labrador Sea Durham University: Durham Research Online Baffin Bay Canada Greenland Geoscience Canada 44 3 91 102 |
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Durham University: Durham Research Online |
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ftunivdurham |
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unknown |
description |
Breakup between Greenland and Canada resulted in oceanic spreading in the Labrador Sea and Baffin Bay. These ocean basins are connected through the Davis Strait, a bathymetric high comprising primarily continental lithosphere, and the focus of the West Greenland Tertiary volcanic province. It has been suggested that a mantle plume facilitated this breakup and generated the associated magmatism. Plume-driven breakup predicts that the earliest, most extensive rifting, magmatism and initial seafloor spreading starts in the same locality, where the postulated plume impinged. Observations from the Labrador Sea–Baffin Bay area do not accord with these predictions. Thus, the plume hypothesis is not confirmed at this locality unless major ad hoc variants are accepted. A model that fits the observations better involves a thick continental lithospheric keel of orogenic origin beneath the Davis Strait that blocked the northward-propagating Labrador Sea rift resulting in locally enhanced magmatism. The Davis Strait lithosphere was thicker and more resilient to rifting because the adjacent Paleoproterozoic Nagssugtoqidian and Torngat orogenic belts contain structures unfavourably orientated with respect to the extensional stress field at the time. |
format |
Article in Journal/Newspaper |
author |
Peace, Alexander L. Foulger, Gillian R. Schiffer, Christian McCaffrey, Ken J.W. |
spellingShingle |
Peace, Alexander L. Foulger, Gillian R. Schiffer, Christian McCaffrey, Ken J.W. Evolution of Labrador Sea–Baffin Bay : plate or plume processes? |
author_facet |
Peace, Alexander L. Foulger, Gillian R. Schiffer, Christian McCaffrey, Ken J.W. |
author_sort |
Peace, Alexander L. |
title |
Evolution of Labrador Sea–Baffin Bay : plate or plume processes? |
title_short |
Evolution of Labrador Sea–Baffin Bay : plate or plume processes? |
title_full |
Evolution of Labrador Sea–Baffin Bay : plate or plume processes? |
title_fullStr |
Evolution of Labrador Sea–Baffin Bay : plate or plume processes? |
title_full_unstemmed |
Evolution of Labrador Sea–Baffin Bay : plate or plume processes? |
title_sort |
evolution of labrador sea–baffin bay : plate or plume processes? |
publisher |
Geological Association of Canada |
publishDate |
2017 |
url |
http://dro.dur.ac.uk/23284/ http://dro.dur.ac.uk/23284/1/23284.pdf https://doi.org/10.12789/geocanj.2017.44.120 https://journals.lib.unb.ca/index.php/GC/article/view/25636 |
geographic |
Baffin Bay Canada Greenland |
geographic_facet |
Baffin Bay Canada Greenland |
genre |
Baffin Bay Baffin Bay Baffin Davis Strait Greenland Labrador Sea |
genre_facet |
Baffin Bay Baffin Bay Baffin Davis Strait Greenland Labrador Sea |
op_source |
Geoscience Canada, 2017, Vol.44(3), pp.91-102 [Peer Reviewed Journal] |
op_relation |
dro:23284 issn:1911-4850 doi:10.12789/geocanj.2017.44.120 http://dro.dur.ac.uk/23284/ https://journals.lib.unb.ca/index.php/GC/article/view/25636 http://dro.dur.ac.uk/23284/1/23284.pdf |
op_doi |
https://doi.org/10.12789/geocanj.2017.44.120 |
container_title |
Geoscience Canada |
container_volume |
44 |
container_issue |
3 |
container_start_page |
91 |
op_container_end_page |
102 |
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1766365223578501120 |