Numerical modelling of Cenozoic stress patterns in the Mid Norwegian Margin and the northern Sea
Numerical modeling of Cenozoic stress patterns in the northern North Sea and the mid-Norwegian margin is presented, and the sense of potential slip along major fault planes belonging to the two areas is restored. We assume that the main regional source of stresses is the Atlantic ridge push as demon...
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2001
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ftvuamstcris:oai:research.vu.nl:publications/930be9a4-c64f-456e-bada-5e817c4addec 2024-09-15T18:10:10+00:00 Numerical modelling of Cenozoic stress patterns in the Mid Norwegian Margin and the northern Sea Pascal, C. Gabrielsen, R.H. 2001 application/pdf https://research.vu.nl/en/publications/930be9a4-c64f-456e-bada-5e817c4addec https://doi.org/10.1029/2001TC900007 https://research.vu.nl/ws/files/1776254/141734.pdf eng eng https://research.vu.nl/en/publications/930be9a4-c64f-456e-bada-5e817c4addec info:eu-repo/semantics/openAccess Pascal , C & Gabrielsen , R H 2001 , ' Numerical modelling of Cenozoic stress patterns in the Mid Norwegian Margin and the northern Sea ' , Tectonics , vol. 20 , no. 4 , pp. 585-599 . https://doi.org/10.1029/2001TC900007 /dk/atira/pure/sustainabledevelopmentgoals/life_below_water name=SDG 14 - Life Below Water article 2001 ftvuamstcris https://doi.org/10.1029/2001TC900007 2024-06-26T23:47:29Z Numerical modeling of Cenozoic stress patterns in the northern North Sea and the mid-Norwegian margin is presented, and the sense of potential slip along major fault planes belonging to the two areas is restored. We assume that the main regional source of stresses is the Atlantic ridge push as demonstrated by previous studies. Furthermore, we also assume a nearly consistent NW-SE strike for the far-field stress from continental breakup between Greenland and Norway (earliest Eocene) to present day. First, we applied the commercial two-dimensional distinct element method (UDEC) to simulate Cenozoic stress and displacement patterns in the study area. Variations in rheology and major fault zones were introduced into the model. The Møore-Trøondelag Fault Complex and its inferred continuation into the Shetland Platform forms the major mechanical discontinuity in the model. Second, we used the SORTAN method, developed at the University of Paris VI, to predict the sense of potential slip along major fault planes. The input for the SORTAN model was constrained by the geometry of the selected fault planes and local principal stress directions extracted from the UDEC modeling. Our results show that the Møore-Trøondelag Fault Complex and its inferred continuation into the Shetland Platform act as a weak fault zone. This fault zone divides the study area into two different stress provinces: the continental margin and the northern North Sea. This result agrees well with the observed differences in Cenozoic structural evolution of the two areas. Compressive structures are observed along the continental margin, whereas relative tectonic quiescence characterizes the northern North Sea during the Tertiary. The restored stress patterns in the northern North Sea and the mid-Norwegian margin also agree well with the observed present-day stress configuration. Our analysis demonstrates a method to reconstruct the sense of slip on major fault planes by combining two complementary numerical tools (UDEC and SORTAN). As a result, it is ... Article in Journal/Newspaper Greenland Vrije Universiteit Amsterdam (VU): Research Portal Tectonics 20 4 585 599 |
institution |
Open Polar |
collection |
Vrije Universiteit Amsterdam (VU): Research Portal |
op_collection_id |
ftvuamstcris |
language |
English |
topic |
/dk/atira/pure/sustainabledevelopmentgoals/life_below_water name=SDG 14 - Life Below Water |
spellingShingle |
/dk/atira/pure/sustainabledevelopmentgoals/life_below_water name=SDG 14 - Life Below Water Pascal, C. Gabrielsen, R.H. Numerical modelling of Cenozoic stress patterns in the Mid Norwegian Margin and the northern Sea |
topic_facet |
/dk/atira/pure/sustainabledevelopmentgoals/life_below_water name=SDG 14 - Life Below Water |
description |
Numerical modeling of Cenozoic stress patterns in the northern North Sea and the mid-Norwegian margin is presented, and the sense of potential slip along major fault planes belonging to the two areas is restored. We assume that the main regional source of stresses is the Atlantic ridge push as demonstrated by previous studies. Furthermore, we also assume a nearly consistent NW-SE strike for the far-field stress from continental breakup between Greenland and Norway (earliest Eocene) to present day. First, we applied the commercial two-dimensional distinct element method (UDEC) to simulate Cenozoic stress and displacement patterns in the study area. Variations in rheology and major fault zones were introduced into the model. The Møore-Trøondelag Fault Complex and its inferred continuation into the Shetland Platform forms the major mechanical discontinuity in the model. Second, we used the SORTAN method, developed at the University of Paris VI, to predict the sense of potential slip along major fault planes. The input for the SORTAN model was constrained by the geometry of the selected fault planes and local principal stress directions extracted from the UDEC modeling. Our results show that the Møore-Trøondelag Fault Complex and its inferred continuation into the Shetland Platform act as a weak fault zone. This fault zone divides the study area into two different stress provinces: the continental margin and the northern North Sea. This result agrees well with the observed differences in Cenozoic structural evolution of the two areas. Compressive structures are observed along the continental margin, whereas relative tectonic quiescence characterizes the northern North Sea during the Tertiary. The restored stress patterns in the northern North Sea and the mid-Norwegian margin also agree well with the observed present-day stress configuration. Our analysis demonstrates a method to reconstruct the sense of slip on major fault planes by combining two complementary numerical tools (UDEC and SORTAN). As a result, it is ... |
format |
Article in Journal/Newspaper |
author |
Pascal, C. Gabrielsen, R.H. |
author_facet |
Pascal, C. Gabrielsen, R.H. |
author_sort |
Pascal, C. |
title |
Numerical modelling of Cenozoic stress patterns in the Mid Norwegian Margin and the northern Sea |
title_short |
Numerical modelling of Cenozoic stress patterns in the Mid Norwegian Margin and the northern Sea |
title_full |
Numerical modelling of Cenozoic stress patterns in the Mid Norwegian Margin and the northern Sea |
title_fullStr |
Numerical modelling of Cenozoic stress patterns in the Mid Norwegian Margin and the northern Sea |
title_full_unstemmed |
Numerical modelling of Cenozoic stress patterns in the Mid Norwegian Margin and the northern Sea |
title_sort |
numerical modelling of cenozoic stress patterns in the mid norwegian margin and the northern sea |
publishDate |
2001 |
url |
https://research.vu.nl/en/publications/930be9a4-c64f-456e-bada-5e817c4addec https://doi.org/10.1029/2001TC900007 https://research.vu.nl/ws/files/1776254/141734.pdf |
genre |
Greenland |
genre_facet |
Greenland |
op_source |
Pascal , C & Gabrielsen , R H 2001 , ' Numerical modelling of Cenozoic stress patterns in the Mid Norwegian Margin and the northern Sea ' , Tectonics , vol. 20 , no. 4 , pp. 585-599 . https://doi.org/10.1029/2001TC900007 |
op_relation |
https://research.vu.nl/en/publications/930be9a4-c64f-456e-bada-5e817c4addec |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1029/2001TC900007 |
container_title |
Tectonics |
container_volume |
20 |
container_issue |
4 |
container_start_page |
585 |
op_container_end_page |
599 |
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1810447777777319936 |