Factors controlling the Cenozoic sequence development in the eastern parts of the North Sea
The causal relationship between the Cenozoic sequence development in the southern North Sea Basin and sea-level changes, climatic fluctuations and tectonic events is unravelled by relating variations in the relative sea level and base level, based on interpretations of seismic surveys, to published...
Published in: | Journal of the Geological Society |
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1999
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ftuniaarhuspubl:oai:pure.atira.dk:publications/ba164599-f8f7-49b6-8e6c-8997f52e9c12 2024-04-14T08:11:27+00:00 Factors controlling the Cenozoic sequence development in the eastern parts of the North Sea Clausen, O. R. Gregersen, U. Michelsen, O. Sørensen, J. C. 1999-07-01 https://pure.au.dk/portal/en/publications/ba164599-f8f7-49b6-8e6c-8997f52e9c12 https://doi.org/10.1144/gsjgs.156.4.0809 http://www.scopus.com/inward/record.url?scp=0032729217&partnerID=8YFLogxK eng eng https://pure.au.dk/portal/en/publications/ba164599-f8f7-49b6-8e6c-8997f52e9c12 info:eu-repo/semantics/restrictedAccess Clausen , O R , Gregersen , U , Michelsen , O & Sørensen , J C 1999 , ' Factors controlling the Cenozoic sequence development in the eastern parts of the North Sea ' , Journal of the Geological Society , vol. 156 , no. 4 , pp. 809-816 . https://doi.org/10.1144/gsjgs.156.4.0809 Cenozoic Deposition Eustasy Glaciotectonics North Sea article 1999 ftuniaarhuspubl https://doi.org/10.1144/gsjgs.156.4.0809 2024-03-21T15:27:12Z The causal relationship between the Cenozoic sequence development in the southern North Sea Basin and sea-level changes, climatic fluctuations and tectonic events is unravelled by relating variations in the relative sea level and base level, based on interpretations of seismic surveys, to published δ 18 O variations and eustatic changes. The latter curve is based on the Earth's orbital forcing, and here informally termed as the GSI curve. The analysis shows that the Cenozoic sequence development in the southeastern North Sea was influenced by climatically and tectonically induced sea-level changes. The major Cenozoic sequence stratigraphic boundaries (lower order) are highly influenced by tectonic events, e.g. uplift of Fennoscandia and increased subsidence rates in the basin centre. Reactivation of Mesozoic fault zones controlled the deposition of minor sand bodies transported to the centre of the basin during the Late Palaeocene by mass flows. The location of an Oligocene mound structure, which constitutes part of a sequence, is controlled by the overall palaeotopography of the basin and local fault-related depressions. Correlation between (i) the ages of our sequences and the δ 18 O variations in the Oligocene succession, and (ii) the GSI curve and the base-level fluctuations of the late Miocene and younger sequences, show that the generation of the higher order sequence boundaries were driven by glacio-eustatic sea-level changes. A climatic control of the sequence formation due to glacio-eustatic sea level changes is therefore suggested for the Oligocene and Pliocene sequences, and probably also for the Upper Miocene sequences. Article in Journal/Newspaper Fennoscandia Aarhus University: Research Journal of the Geological Society 156 4 809 816 |
institution |
Open Polar |
collection |
Aarhus University: Research |
op_collection_id |
ftuniaarhuspubl |
language |
English |
topic |
Cenozoic Deposition Eustasy Glaciotectonics North Sea |
spellingShingle |
Cenozoic Deposition Eustasy Glaciotectonics North Sea Clausen, O. R. Gregersen, U. Michelsen, O. Sørensen, J. C. Factors controlling the Cenozoic sequence development in the eastern parts of the North Sea |
topic_facet |
Cenozoic Deposition Eustasy Glaciotectonics North Sea |
description |
The causal relationship between the Cenozoic sequence development in the southern North Sea Basin and sea-level changes, climatic fluctuations and tectonic events is unravelled by relating variations in the relative sea level and base level, based on interpretations of seismic surveys, to published δ 18 O variations and eustatic changes. The latter curve is based on the Earth's orbital forcing, and here informally termed as the GSI curve. The analysis shows that the Cenozoic sequence development in the southeastern North Sea was influenced by climatically and tectonically induced sea-level changes. The major Cenozoic sequence stratigraphic boundaries (lower order) are highly influenced by tectonic events, e.g. uplift of Fennoscandia and increased subsidence rates in the basin centre. Reactivation of Mesozoic fault zones controlled the deposition of minor sand bodies transported to the centre of the basin during the Late Palaeocene by mass flows. The location of an Oligocene mound structure, which constitutes part of a sequence, is controlled by the overall palaeotopography of the basin and local fault-related depressions. Correlation between (i) the ages of our sequences and the δ 18 O variations in the Oligocene succession, and (ii) the GSI curve and the base-level fluctuations of the late Miocene and younger sequences, show that the generation of the higher order sequence boundaries were driven by glacio-eustatic sea-level changes. A climatic control of the sequence formation due to glacio-eustatic sea level changes is therefore suggested for the Oligocene and Pliocene sequences, and probably also for the Upper Miocene sequences. |
format |
Article in Journal/Newspaper |
author |
Clausen, O. R. Gregersen, U. Michelsen, O. Sørensen, J. C. |
author_facet |
Clausen, O. R. Gregersen, U. Michelsen, O. Sørensen, J. C. |
author_sort |
Clausen, O. R. |
title |
Factors controlling the Cenozoic sequence development in the eastern parts of the North Sea |
title_short |
Factors controlling the Cenozoic sequence development in the eastern parts of the North Sea |
title_full |
Factors controlling the Cenozoic sequence development in the eastern parts of the North Sea |
title_fullStr |
Factors controlling the Cenozoic sequence development in the eastern parts of the North Sea |
title_full_unstemmed |
Factors controlling the Cenozoic sequence development in the eastern parts of the North Sea |
title_sort |
factors controlling the cenozoic sequence development in the eastern parts of the north sea |
publishDate |
1999 |
url |
https://pure.au.dk/portal/en/publications/ba164599-f8f7-49b6-8e6c-8997f52e9c12 https://doi.org/10.1144/gsjgs.156.4.0809 http://www.scopus.com/inward/record.url?scp=0032729217&partnerID=8YFLogxK |
genre |
Fennoscandia |
genre_facet |
Fennoscandia |
op_source |
Clausen , O R , Gregersen , U , Michelsen , O & Sørensen , J C 1999 , ' Factors controlling the Cenozoic sequence development in the eastern parts of the North Sea ' , Journal of the Geological Society , vol. 156 , no. 4 , pp. 809-816 . https://doi.org/10.1144/gsjgs.156.4.0809 |
op_relation |
https://pure.au.dk/portal/en/publications/ba164599-f8f7-49b6-8e6c-8997f52e9c12 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1144/gsjgs.156.4.0809 |
container_title |
Journal of the Geological Society |
container_volume |
156 |
container_issue |
4 |
container_start_page |
809 |
op_container_end_page |
816 |
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1796309148811395072 |