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. During the break-up of the North Atlantic the plate tectonic configuration was characterized by sequential dextral shear, extension, and eventually contraction and inversion. This generated a complex zone of def...
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Copernicus Publications
2023
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ftdoajarticles:oai:doaj.org/article:aa0ec6bc6d5b46299bfd7865bf2c924f 2023-10-01T03:55:00+02:00 Analogue experiments on releasing and restraining bends and their application to the study of the Barents Shear Margin R. H. Gabrielsen P. A. Giannenas D. Sokoutis E. Willingshofer M. Hassaan J. I. Faleide 2023-08-01T00:00:00Z https://doi.org/10.5194/se-14-961-2023 https://doaj.org/article/aa0ec6bc6d5b46299bfd7865bf2c924f EN eng Copernicus Publications https://se.copernicus.org/articles/14/961/2023/se-14-961-2023.pdf https://doaj.org/toc/1869-9510 https://doaj.org/toc/1869-9529 doi:10.5194/se-14-961-2023 1869-9510 1869-9529 https://doaj.org/article/aa0ec6bc6d5b46299bfd7865bf2c924f Solid Earth, Vol 14, Pp 961-983 (2023) Geology QE1-996.5 Stratigraphy QE640-699 article 2023 ftdoajarticles https://doi.org/10.5194/se-14-961-2023 2023-09-03T00:50:20Z The Barents Shear Margin separates the Svalbard and Barents Sea from the North Atlantic. During the break-up of the North Atlantic the plate tectonic configuration was characterized by sequential dextral shear, extension, and eventually contraction and inversion. This generated a complex zone of deformation that contains several structural families of overlapping and reactivated structures. A series of crustal-scale analogue experiments, utilizing a scaled and stratified sand–silicon polymer sequence, was used in the study of the structural evolution of the shear margin. The most significant observations for interpreting the structural configuration of the Barents Shear Margin are the following. Prominent early-stage positive structural elements (e.g. folds, push-ups) interacted with younger (e.g. inversion) structures and contributed to a hybrid final structural pattern. Several structural features that were initiated during the early (dextral shear) stage became overprinted and obliterated in the subsequent stages. All master faults, pull-apart basins, and extensional shear duplexes initiated during the shear stage quickly became linked in the extension stage, generating a connected basin system along the entire shear margin at the stage of maximum extension. The fold pattern was generated during the terminal stage (contraction–inversion became dominant in the basin areas) and was characterized by fold axes striking parallel to the basin margins. These folds, however, strongly affected the shallow intra-basin layers. 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. Article in Journal/Newspaper Barents Sea North Atlantic Svalbard Directory of Open Access Journals: DOAJ Articles Barents Sea Svalbard Solid Earth 14 9 961 983 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Geology QE1-996.5 Stratigraphy QE640-699 |
spellingShingle |
Geology QE1-996.5 Stratigraphy QE640-699 R. H. Gabrielsen P. A. Giannenas D. Sokoutis E. Willingshofer M. Hassaan J. I. Faleide Analogue experiments on releasing and restraining bends and their application to the study of the Barents Shear Margin |
topic_facet |
Geology QE1-996.5 Stratigraphy QE640-699 |
description |
The Barents Shear Margin separates the Svalbard and Barents Sea from the North Atlantic. During the break-up of the North Atlantic the plate tectonic configuration was characterized by sequential dextral shear, extension, and eventually contraction and inversion. This generated a complex zone of deformation that contains several structural families of overlapping and reactivated structures. A series of crustal-scale analogue experiments, utilizing a scaled and stratified sand–silicon polymer sequence, was used in the study of the structural evolution of the shear margin. The most significant observations for interpreting the structural configuration of the Barents Shear Margin are the following. Prominent early-stage positive structural elements (e.g. folds, push-ups) interacted with younger (e.g. inversion) structures and contributed to a hybrid final structural pattern. Several structural features that were initiated during the early (dextral shear) stage became overprinted and obliterated in the subsequent stages. All master faults, pull-apart basins, and extensional shear duplexes initiated during the shear stage quickly became linked in the extension stage, generating a connected basin system along the entire shear margin at the stage of maximum extension. The fold pattern was generated during the terminal stage (contraction–inversion became dominant in the basin areas) and was characterized by fold axes striking parallel to the basin margins. These folds, however, strongly affected the shallow intra-basin layers. 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. |
format |
Article in Journal/Newspaper |
author |
R. H. Gabrielsen P. A. Giannenas D. Sokoutis E. Willingshofer M. Hassaan J. I. Faleide |
author_facet |
R. H. Gabrielsen P. A. Giannenas D. Sokoutis E. Willingshofer M. Hassaan J. I. Faleide |
author_sort |
R. H. Gabrielsen |
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/se-14-961-2023 https://doaj.org/article/aa0ec6bc6d5b46299bfd7865bf2c924f |
geographic |
Barents Sea Svalbard |
geographic_facet |
Barents Sea Svalbard |
genre |
Barents Sea North Atlantic Svalbard |
genre_facet |
Barents Sea North Atlantic Svalbard |
op_source |
Solid Earth, Vol 14, Pp 961-983 (2023) |
op_relation |
https://se.copernicus.org/articles/14/961/2023/se-14-961-2023.pdf https://doaj.org/toc/1869-9510 https://doaj.org/toc/1869-9529 doi:10.5194/se-14-961-2023 1869-9510 1869-9529 https://doaj.org/article/aa0ec6bc6d5b46299bfd7865bf2c924f |
op_doi |
https://doi.org/10.5194/se-14-961-2023 |
container_title |
Solid Earth |
container_volume |
14 |
container_issue |
9 |
container_start_page |
961 |
op_container_end_page |
983 |
_version_ |
1778523074238349312 |