Analogue experiments on releasing and restraining bends and their application to the study of the Barents Shear Margin
The Barents Shear Margin separates the Svalbard and Barents Sea from the North Atlantic. It includes one northern (Hornsund Fault Zone) and a southern (Senja Fracture Zone) margin segment in which structuring was dominated by dextral shear. These segments are separated by the Vestbakken Volcanic Pro...
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Copernicus Publications
2023
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Online Access: | https://doi.org/10.5194/egusphere-2023-10 https://noa.gwlb.de/receive/cop_mods_00064396 https://egusphere.copernicus.org/preprints/egusphere-2023-10/egusphere-2023-10.pdf |
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00064396 2023-05-15T15:39:09+02:00 Analogue experiments on releasing and restraining bends and their application to the study of the Barents Shear Margin Gabrielsen, Roy Helge Giennenas, Panagiotis Athanasios Sokoutis, Dimitrios Willingshofer, Ernst Hassaan, Muhammad Faleide, Jan Inge 2023-01 electronic https://doi.org/10.5194/egusphere-2023-10 https://noa.gwlb.de/receive/cop_mods_00064396 https://egusphere.copernicus.org/preprints/egusphere-2023-10/egusphere-2023-10.pdf eng eng Copernicus Publications https://doi.org/10.5194/egusphere-2023-10 https://noa.gwlb.de/receive/cop_mods_00064396 https://egusphere.copernicus.org/preprints/egusphere-2023-10/egusphere-2023-10.pdf https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/restrictedAccess CC-BY article Verlagsveröffentlichung article Text doc-type:article 2023 ftnonlinearchiv https://doi.org/10.5194/egusphere-2023-10 2023-01-16T00:13:40Z The Barents Shear Margin separates the Svalbard and Barents Sea from the North Atlantic. It includes one northern (Hornsund Fault Zone) and a southern (Senja Fracture Zone) margin segment in which structuring was dominated by dextral shear. These segments are separated by the Vestbakken Volcanic Province that rests in a releasing bend position between the two. During the break-up of the North Atlantic the plate tectonic configuration was characterized by sequential dextral shear, extension, contraction and inversion. This generated a complex zone of deformation that contain several structural families of over-lapping and reactivated structures Although the convolute structural pattern associated with the Barents Shear Margin has been noted, it has not yet been explained in this framework. A series of crustal-scale analogue experiments, utilizing a scaled stratified sand-silicon polymer sequence, serve to study the structural evolution of the shear margin in response to shear deformation along a pre-defined boundary representing the geometry of the Barents Shear Margin and variations in kinematic boundary conditions of subsequent deformation events, i.e. direction of extension and inversion. The observations that are of particular significance for interpretating the structural configuration of the Barents Shear Margin are: 1) The experiments reproduced the geometry and positions of the major basins and relations between structural elements (fault and fold systems) as observed along and adjacent to the Barents Shear Margin. This supports the present structural model for the shear margin. 2) Several of the structural features that were initiated during the early (dextral shear) stage became overprinted and obliterated in the subsequent stages. 3) Prominent early-stage positive structural elements (e.g. folds, push-ups) interacted with younger (e.g. inversion) structures and contributed to a complex final structural pattern. 4) All master faults, pull-part basins and extensional shear duplexes initiated during the ... Article in Journal/Newspaper Barents Sea Hornsund North Atlantic Svalbard Niedersächsisches Online-Archiv NOA Barents Sea Hornsund ENVELOPE(15.865,15.865,76.979,76.979) Senja ENVELOPE(16.803,16.803,69.081,69.081) Svalbard Vestbakken ENVELOPE(16.250,16.250,74.417,74.417) |
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Open Polar |
collection |
Niedersächsisches Online-Archiv NOA |
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ftnonlinearchiv |
language |
English |
topic |
article Verlagsveröffentlichung |
spellingShingle |
article Verlagsveröffentlichung Gabrielsen, Roy Helge Giennenas, Panagiotis Athanasios Sokoutis, Dimitrios Willingshofer, Ernst Hassaan, Muhammad Faleide, Jan Inge Analogue experiments on releasing and restraining bends and their application to the study of the Barents Shear Margin |
topic_facet |
article Verlagsveröffentlichung |
description |
The Barents Shear Margin separates the Svalbard and Barents Sea from the North Atlantic. It includes one northern (Hornsund Fault Zone) and a southern (Senja Fracture Zone) margin segment in which structuring was dominated by dextral shear. These segments are separated by the Vestbakken Volcanic Province that rests in a releasing bend position between the two. During the break-up of the North Atlantic the plate tectonic configuration was characterized by sequential dextral shear, extension, contraction and inversion. This generated a complex zone of deformation that contain several structural families of over-lapping and reactivated structures Although the convolute structural pattern associated with the Barents Shear Margin has been noted, it has not yet been explained in this framework. A series of crustal-scale analogue experiments, utilizing a scaled stratified sand-silicon polymer sequence, serve to study the structural evolution of the shear margin in response to shear deformation along a pre-defined boundary representing the geometry of the Barents Shear Margin and variations in kinematic boundary conditions of subsequent deformation events, i.e. direction of extension and inversion. The observations that are of particular significance for interpretating the structural configuration of the Barents Shear Margin are: 1) The experiments reproduced the geometry and positions of the major basins and relations between structural elements (fault and fold systems) as observed along and adjacent to the Barents Shear Margin. This supports the present structural model for the shear margin. 2) Several of the structural features that were initiated during the early (dextral shear) stage became overprinted and obliterated in the subsequent stages. 3) Prominent early-stage positive structural elements (e.g. folds, push-ups) interacted with younger (e.g. inversion) structures and contributed to a complex final structural pattern. 4) All master faults, pull-part basins and extensional shear duplexes initiated during the ... |
format |
Article in Journal/Newspaper |
author |
Gabrielsen, Roy Helge Giennenas, Panagiotis Athanasios Sokoutis, Dimitrios Willingshofer, Ernst Hassaan, Muhammad Faleide, Jan Inge |
author_facet |
Gabrielsen, Roy Helge Giennenas, Panagiotis Athanasios Sokoutis, Dimitrios Willingshofer, Ernst Hassaan, Muhammad Faleide, Jan Inge |
author_sort |
Gabrielsen, Roy Helge |
title |
Analogue experiments on releasing and restraining bends and their application to the study of the Barents Shear Margin |
title_short |
Analogue experiments on releasing and restraining bends and their application to the study of the Barents Shear Margin |
title_full |
Analogue experiments on releasing and restraining bends and their application to the study of the Barents Shear Margin |
title_fullStr |
Analogue experiments on releasing and restraining bends and their application to the study of the Barents Shear Margin |
title_full_unstemmed |
Analogue experiments on releasing and restraining bends and their application to the study of the Barents Shear Margin |
title_sort |
analogue experiments on releasing and restraining bends and their application to the study of the barents shear margin |
publisher |
Copernicus Publications |
publishDate |
2023 |
url |
https://doi.org/10.5194/egusphere-2023-10 https://noa.gwlb.de/receive/cop_mods_00064396 https://egusphere.copernicus.org/preprints/egusphere-2023-10/egusphere-2023-10.pdf |
long_lat |
ENVELOPE(15.865,15.865,76.979,76.979) ENVELOPE(16.803,16.803,69.081,69.081) ENVELOPE(16.250,16.250,74.417,74.417) |
geographic |
Barents Sea Hornsund Senja Svalbard Vestbakken |
geographic_facet |
Barents Sea Hornsund Senja Svalbard Vestbakken |
genre |
Barents Sea Hornsund North Atlantic Svalbard |
genre_facet |
Barents Sea Hornsund North Atlantic Svalbard |
op_relation |
https://doi.org/10.5194/egusphere-2023-10 https://noa.gwlb.de/receive/cop_mods_00064396 https://egusphere.copernicus.org/preprints/egusphere-2023-10/egusphere-2023-10.pdf |
op_rights |
https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/restrictedAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.5194/egusphere-2023-10 |
_version_ |
1766370614777479168 |