Miocene uplift of the NE Greenland margin linked to plate tectonics:Seismic evidence from the Greenland Fracture Zone, NE Atlantic
Tectonic models predict that following breakup, rift margins undergo only decaying thermalsubsidence during their postrift evolution. However, postbreakup stratigraphy beneath the NE Atlantic shelvesshows evidence of regional-scale unconformities, commonly cited as outer margin responses to inner ma...
Published in: | Tectonics |
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2016
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Online Access: | https://curis.ku.dk/portal/da/publications/miocene-uplift-of-the-ne-greenland-margin-linked-to-plate-tectonics(1a236def-f66a-4156-8c29-dcad8ddf5836).html https://doi.org/10.1002/2015TC004079 |
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ftcopenhagenunip:oai:pure.atira.dk:publications/1a236def-f66a-4156-8c29-dcad8ddf5836 2024-02-27T08:40:07+00:00 Miocene uplift of the NE Greenland margin linked to plate tectonics:Seismic evidence from the Greenland Fracture Zone, NE Atlantic Dossing, Arne Japsen, Peter Watts, Anthony B. Nielsen, Tove Jokat, Wilfried Thybo, Hans Dahl-Jensen, Trine 2016-02 https://curis.ku.dk/portal/da/publications/miocene-uplift-of-the-ne-greenland-margin-linked-to-plate-tectonics(1a236def-f66a-4156-8c29-dcad8ddf5836).html https://doi.org/10.1002/2015TC004079 eng eng info:eu-repo/semantics/closedAccess Dossing , A , Japsen , P , Watts , A B , Nielsen , T , Jokat , W , Thybo , H & Dahl-Jensen , T 2016 , ' Miocene uplift of the NE Greenland margin linked to plate tectonics : Seismic evidence from the Greenland Fracture Zone, NE Atlantic ' , Tectonics , vol. 35 , no. 2 , pp. 257-282 . https://doi.org/10.1002/2015TC004079 margin uplift plate tectonics Atlantic Greenland fracture zone seismic article 2016 ftcopenhagenunip https://doi.org/10.1002/2015TC004079 2024-02-01T00:04:31Z Tectonic models predict that following breakup, rift margins undergo only decaying thermalsubsidence during their postrift evolution. However, postbreakup stratigraphy beneath the NE Atlantic shelvesshows evidence of regional-scale unconformities, commonly cited as outer margin responses to inner marginepisodic uplift, including the formation of coastal mountains. The origin of these events remains enigmatic. Wepresent a seismic reflection study from the Greenland Fracture Zone-East Greenland Ridge (GFZ-EGR) and theNE Greenland shelf. We document a regional intra-Miocene seismic unconformity (IMU), which marks thetermination of synrift deposition in the deep-sea basins and onset of (i) thermomechanical coupling acrossthe GFZ, (ii) basin compression, and (iii) contourite deposition, north of the EGR. The onset of coupling acrossthe GFZ is constrained by results of 2-D flexural backstripping. We explain the thermomechanical couplingand the deposition of contourites by the formation of a continuous plate boundary along the Mohns andKnipovich ridges, leading to an accelerated widening of the Fram Strait. We demonstrate that the IMU event islinked to onset of uplift and massive shelf progradation on the NE Greenland margin. Given an estimatedmiddle to late Miocene (~15–10 Ma) age of the IMU, we speculate that the event is synchronous with uplift ofthe east and west Greenland margins. The correlation between margin uplift and plate motion changes furtherindicates that the uplift was triggered by plate tectonic forces, induced perhaps by a change in the Icelandplume (a hot pulse) and/or by changes in intraplate stresses related to global tectonics. Article in Journal/Newspaper East Greenland Fram Strait Greenland University of Copenhagen: Research East Greenland Ridge ENVELOPE(2.557,2.557,75.182,75.182) Greenland Greenland Fracture Zone ENVELOPE(0.500,0.500,75.500,75.500) Tectonics 35 2 257 282 |
institution |
Open Polar |
collection |
University of Copenhagen: Research |
op_collection_id |
ftcopenhagenunip |
language |
English |
topic |
margin uplift plate tectonics Atlantic Greenland fracture zone seismic |
spellingShingle |
margin uplift plate tectonics Atlantic Greenland fracture zone seismic Dossing, Arne Japsen, Peter Watts, Anthony B. Nielsen, Tove Jokat, Wilfried Thybo, Hans Dahl-Jensen, Trine Miocene uplift of the NE Greenland margin linked to plate tectonics:Seismic evidence from the Greenland Fracture Zone, NE Atlantic |
topic_facet |
margin uplift plate tectonics Atlantic Greenland fracture zone seismic |
description |
Tectonic models predict that following breakup, rift margins undergo only decaying thermalsubsidence during their postrift evolution. However, postbreakup stratigraphy beneath the NE Atlantic shelvesshows evidence of regional-scale unconformities, commonly cited as outer margin responses to inner marginepisodic uplift, including the formation of coastal mountains. The origin of these events remains enigmatic. Wepresent a seismic reflection study from the Greenland Fracture Zone-East Greenland Ridge (GFZ-EGR) and theNE Greenland shelf. We document a regional intra-Miocene seismic unconformity (IMU), which marks thetermination of synrift deposition in the deep-sea basins and onset of (i) thermomechanical coupling acrossthe GFZ, (ii) basin compression, and (iii) contourite deposition, north of the EGR. The onset of coupling acrossthe GFZ is constrained by results of 2-D flexural backstripping. We explain the thermomechanical couplingand the deposition of contourites by the formation of a continuous plate boundary along the Mohns andKnipovich ridges, leading to an accelerated widening of the Fram Strait. We demonstrate that the IMU event islinked to onset of uplift and massive shelf progradation on the NE Greenland margin. Given an estimatedmiddle to late Miocene (~15–10 Ma) age of the IMU, we speculate that the event is synchronous with uplift ofthe east and west Greenland margins. The correlation between margin uplift and plate motion changes furtherindicates that the uplift was triggered by plate tectonic forces, induced perhaps by a change in the Icelandplume (a hot pulse) and/or by changes in intraplate stresses related to global tectonics. |
format |
Article in Journal/Newspaper |
author |
Dossing, Arne Japsen, Peter Watts, Anthony B. Nielsen, Tove Jokat, Wilfried Thybo, Hans Dahl-Jensen, Trine |
author_facet |
Dossing, Arne Japsen, Peter Watts, Anthony B. Nielsen, Tove Jokat, Wilfried Thybo, Hans Dahl-Jensen, Trine |
author_sort |
Dossing, Arne |
title |
Miocene uplift of the NE Greenland margin linked to plate tectonics:Seismic evidence from the Greenland Fracture Zone, NE Atlantic |
title_short |
Miocene uplift of the NE Greenland margin linked to plate tectonics:Seismic evidence from the Greenland Fracture Zone, NE Atlantic |
title_full |
Miocene uplift of the NE Greenland margin linked to plate tectonics:Seismic evidence from the Greenland Fracture Zone, NE Atlantic |
title_fullStr |
Miocene uplift of the NE Greenland margin linked to plate tectonics:Seismic evidence from the Greenland Fracture Zone, NE Atlantic |
title_full_unstemmed |
Miocene uplift of the NE Greenland margin linked to plate tectonics:Seismic evidence from the Greenland Fracture Zone, NE Atlantic |
title_sort |
miocene uplift of the ne greenland margin linked to plate tectonics:seismic evidence from the greenland fracture zone, ne atlantic |
publishDate |
2016 |
url |
https://curis.ku.dk/portal/da/publications/miocene-uplift-of-the-ne-greenland-margin-linked-to-plate-tectonics(1a236def-f66a-4156-8c29-dcad8ddf5836).html https://doi.org/10.1002/2015TC004079 |
long_lat |
ENVELOPE(2.557,2.557,75.182,75.182) ENVELOPE(0.500,0.500,75.500,75.500) |
geographic |
East Greenland Ridge Greenland Greenland Fracture Zone |
geographic_facet |
East Greenland Ridge Greenland Greenland Fracture Zone |
genre |
East Greenland Fram Strait Greenland |
genre_facet |
East Greenland Fram Strait Greenland |
op_source |
Dossing , A , Japsen , P , Watts , A B , Nielsen , T , Jokat , W , Thybo , H & Dahl-Jensen , T 2016 , ' Miocene uplift of the NE Greenland margin linked to plate tectonics : Seismic evidence from the Greenland Fracture Zone, NE Atlantic ' , Tectonics , vol. 35 , no. 2 , pp. 257-282 . https://doi.org/10.1002/2015TC004079 |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1002/2015TC004079 |
container_title |
Tectonics |
container_volume |
35 |
container_issue |
2 |
container_start_page |
257 |
op_container_end_page |
282 |
_version_ |
1792047211311267840 |