A new stratigraphic framework for the Miocene – Lower Pliocene deposits offshore Scandinavia: A multiscale approach
Here, we present an updated stratigraphic subdivision of the Oligocene to Pleistocene succession (880–610 m) in the newly proposed type well for the Molo Formation, the industrial 6407/9‐5 well, located on the continental shelf in the eastern Norwegian Sea. Furthermore, new data from the Danish Nort...
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crwiley:10.1002/gj.3982 2024-09-15T18:26:50+00:00 A new stratigraphic framework for the Miocene – Lower Pliocene deposits offshore Scandinavia: A multiscale approach Dybkjær, Karen Rasmussen, Erik Skovbjerg Eidvin, Tor Grøsfjeld, Kari Riis, Fridtjof Piasecki, Stefan Śliwińska, Kasia K. 2020 http://dx.doi.org/10.1002/gj.3982 https://onlinelibrary.wiley.com/doi/pdf/10.1002/gj.3982 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/gj.3982 en eng Wiley http://creativecommons.org/licenses/by/4.0/ Geological Journal volume 56, issue 3, page 1699-1725 ISSN 0072-1050 1099-1034 journal-article 2020 crwiley https://doi.org/10.1002/gj.3982 2024-08-27T04:31:22Z Here, we present an updated stratigraphic subdivision of the Oligocene to Pleistocene succession (880–610 m) in the newly proposed type well for the Molo Formation, the industrial 6407/9‐5 well, located on the continental shelf in the eastern Norwegian Sea. Furthermore, new data from the Danish North Sea wells Nora‐1, Vagn‐2, and Tove‐1 are presented. The studied succession in the 6407/9‐5 well is composed of five sedimentary units separated by hiati. The dating of these five units is based on correlation to the stratigraphically more complete Neogene succession in the (Danish) central North Sea area. In this study, a robust stratigraphic framework of these five units, based on a combination of dinoflagellate cysts (dinocyst) stratigraphy and seismic data, is established. The Oligocene succession is referred to the NSO zonation of Van Simaeys et al., Review of Palaeobotany and Palynology , 2005, 134, 105–128, while the Miocene–Pliocene succession is referred to the dinocyst zonation of Dybkjær and Piasecki, Review of Palaeobotany and Palynology , 2010, 161, 1–29. In well 6407/9‐5 the two lowermost units, located below the Molo Formation, comprise a Rupelian (Lower Oligocene) succession up to 803 m, and an Aquitanian/Burdigalian (Lower Miocene) succession from 803 to 787 m, respectively. Both of these units are referred to the Brygge Formation. The Molo Formation is separated from the underlying Brygge Formation by an unconformity. Furthermore, and in contrast to previous studies, our study shows that the Molo Formation (787–703 m) has an unconformity within it. The lower part of the formation (787–724 m) is dated to late Tortonian (Late Miocene), and referred to the Hystrichosphaeropsis obscura dinocyst Zone. The upper part (724–703 m) is dated to Zanclean (Early Pliocene), and referred to the Melitasphaeridium choanophorum dinocyst Zone. The uppermost unit studied (703–670 m) in the well is referred to the Gelasian (Lower Pleistocene) and is included in the Naust Formation. The regional correlation of this ... Article in Journal/Newspaper Norwegian Sea Wiley Online Library Geological Journal 56 3 1699 1725 |
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English |
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Here, we present an updated stratigraphic subdivision of the Oligocene to Pleistocene succession (880–610 m) in the newly proposed type well for the Molo Formation, the industrial 6407/9‐5 well, located on the continental shelf in the eastern Norwegian Sea. Furthermore, new data from the Danish North Sea wells Nora‐1, Vagn‐2, and Tove‐1 are presented. The studied succession in the 6407/9‐5 well is composed of five sedimentary units separated by hiati. The dating of these five units is based on correlation to the stratigraphically more complete Neogene succession in the (Danish) central North Sea area. In this study, a robust stratigraphic framework of these five units, based on a combination of dinoflagellate cysts (dinocyst) stratigraphy and seismic data, is established. The Oligocene succession is referred to the NSO zonation of Van Simaeys et al., Review of Palaeobotany and Palynology , 2005, 134, 105–128, while the Miocene–Pliocene succession is referred to the dinocyst zonation of Dybkjær and Piasecki, Review of Palaeobotany and Palynology , 2010, 161, 1–29. In well 6407/9‐5 the two lowermost units, located below the Molo Formation, comprise a Rupelian (Lower Oligocene) succession up to 803 m, and an Aquitanian/Burdigalian (Lower Miocene) succession from 803 to 787 m, respectively. Both of these units are referred to the Brygge Formation. The Molo Formation is separated from the underlying Brygge Formation by an unconformity. Furthermore, and in contrast to previous studies, our study shows that the Molo Formation (787–703 m) has an unconformity within it. The lower part of the formation (787–724 m) is dated to late Tortonian (Late Miocene), and referred to the Hystrichosphaeropsis obscura dinocyst Zone. The upper part (724–703 m) is dated to Zanclean (Early Pliocene), and referred to the Melitasphaeridium choanophorum dinocyst Zone. The uppermost unit studied (703–670 m) in the well is referred to the Gelasian (Lower Pleistocene) and is included in the Naust Formation. The regional correlation of this ... |
format |
Article in Journal/Newspaper |
author |
Dybkjær, Karen Rasmussen, Erik Skovbjerg Eidvin, Tor Grøsfjeld, Kari Riis, Fridtjof Piasecki, Stefan Śliwińska, Kasia K. |
spellingShingle |
Dybkjær, Karen Rasmussen, Erik Skovbjerg Eidvin, Tor Grøsfjeld, Kari Riis, Fridtjof Piasecki, Stefan Śliwińska, Kasia K. A new stratigraphic framework for the Miocene – Lower Pliocene deposits offshore Scandinavia: A multiscale approach |
author_facet |
Dybkjær, Karen Rasmussen, Erik Skovbjerg Eidvin, Tor Grøsfjeld, Kari Riis, Fridtjof Piasecki, Stefan Śliwińska, Kasia K. |
author_sort |
Dybkjær, Karen |
title |
A new stratigraphic framework for the Miocene – Lower Pliocene deposits offshore Scandinavia: A multiscale approach |
title_short |
A new stratigraphic framework for the Miocene – Lower Pliocene deposits offshore Scandinavia: A multiscale approach |
title_full |
A new stratigraphic framework for the Miocene – Lower Pliocene deposits offshore Scandinavia: A multiscale approach |
title_fullStr |
A new stratigraphic framework for the Miocene – Lower Pliocene deposits offshore Scandinavia: A multiscale approach |
title_full_unstemmed |
A new stratigraphic framework for the Miocene – Lower Pliocene deposits offshore Scandinavia: A multiscale approach |
title_sort |
new stratigraphic framework for the miocene – lower pliocene deposits offshore scandinavia: a multiscale approach |
publisher |
Wiley |
publishDate |
2020 |
url |
http://dx.doi.org/10.1002/gj.3982 https://onlinelibrary.wiley.com/doi/pdf/10.1002/gj.3982 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/gj.3982 |
genre |
Norwegian Sea |
genre_facet |
Norwegian Sea |
op_source |
Geological Journal volume 56, issue 3, page 1699-1725 ISSN 0072-1050 1099-1034 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1002/gj.3982 |
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Geological Journal |
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56 |
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3 |
container_start_page |
1699 |
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1725 |
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1810467478420062208 |