Lithostratigraphy of the Palaeogene – Lower Neogene succession of the Danish North Sea

Schiøler, Poul; Andsbjerg, Jan; Clausen, Ole Rønø; Dam, Gregers; Dybkjær, Karen; Hamberg, Lars; Heilmann‐Clausen, Claus; Johannessen, Erik P.; Kristensen, L. E.; Prince, Iain; Rasmussen, Jan Audun

doi:10.34194/geusb.v12.5249

Cited by 53 publications

(65 citation statements)

References 43 publications

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“…The lower boundary of PAL 1 corresponds to the top of the chalk deposits dated at the Danian–Selandian boundary, ca . 61 Ma (Schiøler et al ., ) (Fig. ).…”

Section: Results and Interpretation Of Unitsmentioning

confidence: 93%

“…D anish onshore lithostratigraphy adapted from Schiøler et al . () and Rasmussen et al . () and Rasmussen .…”

Section: Database and Methodsmentioning

confidence: 87%

“…Unconformities of similar age are observed in studies from the northern, central and eastern North Sea (Rundberg & Smalley, ; Jordt et al ., ; Michelsen et al ., ; Huuse & Clausen, ). We trace these unconformities throughout the North Sea from the reference lines provided by GEUS, dated using the most recent revised stratigraphy of the North Sea, where chronostratigraphic control is based on palynology and rubidium‐strontium dating (Eidvin & Rundberg, ; Rasmussen et al ., ; Schiøler et al ., ). Well logs from the Norwegian Petroleum Directorate (NPD) were used to verify our interpretation of the depth to key boundaries (Fig.…”

Section: Database and Methodsmentioning

confidence: 97%

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A synthesis of Cenozoic sedimentation in the North Sea

Anell

Thybo

Rasmussen³

2011

Basin Research

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The North Sea Basin contains an almost complete record of Cenozoic sedimentation, separated by clear regional unconformities. The changes in sediment characteristics, rate and source, and expression of the unconformities reflect the tectonic, eustatic and climatic changes that the North Sea and its margins have undergone. While the North Sea has been mapped locally, we present the first regional mapping of the Cenozoic sedimentary strata. Our study provides a new regional sub-division of the main seismic units in the North Sea together with maps of depocentres, influx direction and source areas. Our study provides a regional synthesis of sedimentation based on a comprehensive interpretation of a regionally covering reflection seismic data set. We relate observations of sediment characteristics and unconformities to the geological evolution. The timing, regional expression and stratigraphic characteristics of many unconformities indicate that they were generated by eustatic sea-level fall, often in conjunction with other processes. Early Cenozoic unconformities, however, relate to tectonism associated with the opening of the North Atlantic. From observation on a regional scale, we infer that the sediment influx into the North Sea during the Cenozoic is more complex than previously suggested clockwise rotation from early northwestern to late southern sources. The Shetland Platform supplied sediment continuously, although at varying rates, until the latest Cenozoic. Sedimentation around Norway changed from early Cenozoic influx from the southwestern margin, to almost exclusively from the southern margin in the Oligocene and from all of southern Norway in the latest Cenozoic. Thick Eocene deposits in the Central Graben are sourced mainly from a western and a likely southern source, indicating that prominent influx from the south did not only occur from the mid-Miocene onwards. We infer a new age for the increased progradational sediment influx in the Pleistocene of 2.5 Ma, coeval with Fennoscandian glaciation.

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“…The lower boundary of PAL 1 corresponds to the top of the chalk deposits dated at the Danian–Selandian boundary, ca . 61 Ma (Schiøler et al ., ) (Fig. ).…”

Section: Results and Interpretation Of Unitsmentioning

confidence: 93%

“…D anish onshore lithostratigraphy adapted from Schiøler et al . () and Rasmussen et al . () and Rasmussen .…”

Section: Database and Methodsmentioning

confidence: 87%

Section: Database and Methodsmentioning

confidence: 97%

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A synthesis of Cenozoic sedimentation in the North Sea

Anell

Thybo

Rasmussen³

2011

Basin Research

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“…(a) The figure shows the position of the mid‐Miocene Unconformity (“ MMU ”; Gołędowski et al ., ); top Unit 6 (Michelsen et al ., ) and the Top Lark (Schiøler et al ., ). The high gamma peaks above the boundary are interpreted as a condensed interval probably including a maximum flooding surface ( MFS ) (Michelsen et al ., ).…”

Section: The Mid‐miocene Unconformitymentioning

confidence: 97%

Reply to comment of E. S. Rasmussen and K. Dybkjær on Patterns of Cenozoic sediment flux from western Scandinavia, by B. Gołędowski, S. B. Nielsen and O. R. Clausen, Basin Research (2012), 24(4), 377–400

2014

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“…However, in the western part of the Danish offshore sector, the Top Hordaland Group is dated to be slightly younger, ca . 13 Ma (Schiøler et al ., ).…”

Section: The ‘Mid‐miocene Unconformity’mentioning

confidence: 97%

Patterns of Cenozoic sediment flux from western Scandinavia: discussion

Rasmussen

Dybkjær

2013

Basin Research

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The recent paper by Gołe z dowski et al. (2012) is a contribution to the ongoing debate regarding the possible processes involved in the geological evolution of the North Sea basin and adjacent hinterlands during the Cenozoic. Their major conclusions state (1) that the prominent seismic feature called the 'mid-Miocene unconformity' (MMU) is a diachroneous surface in the North Sea basin and forms a regional hiatus and (2) that sediment flux from western Scandinavia was primarily controlled by climate and vegetation cover from the Late Eocene and onwards. We believe, however, that regarding the eastern North Sea basin, which was the depocentre for sediments sourced from southwestern Scandinavia, these conclusions are not supported by the geological record. The socalled 'mid-Miocene unconformity' is not a regional hiatus in the Danish and Norwegian sectors of the North Sea basin, but represents a distinct shift from prograding delta/slope systems to deposition of deeper marine hemipelagic mud, and thus provides a distinct seismic marker horizon. However, detailed studies show that there is a continuous sedimentation dominated by glacony-rich mud where a ca. 3 m thick mudlayer spans several millions years and thus are below seismic resolution. Consequently, seismic stratigraphy is not applicable for this condensed section. (1) Warm climate and dense vegetation cover in southern Scandinavia during the mid-Miocene Climatic Optimum were not able to hinder the progradation of a major siliciclastic wedge from Scandinavia into the North Sea basin. (2) The distinct temperature decrease in the Serravallian does not correlate with the aforementioned progradation, but on the contrary, correlate with the culmination of a major flooding event and deposition of a condensed succession of marine glaucony-rich clay. THE MID-MIOCENE UNCONFORMITYThe 'mid-Miocene Unconformity' represents a key surface of the postulated link between climate and basin fill Correspondence: E. S. Rasmussen, Geological Survey of Denmark and Greenland (GEUS),

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Lithostratigraphy of the Palaeogene – Lower Neogene succession of the Danish North Sea

Cited by 53 publications

References 43 publications

A synthesis of Cenozoic sedimentation in the North Sea

A synthesis of Cenozoic sedimentation in the North Sea

Reply to comment of E. S. Rasmussen and K. Dybkjær on Patterns of Cenozoic sediment flux from western Scandinavia, by B. Gołędowski, S. B. Nielsen and O. R. Clausen, Basin Research (2012), 24(4), 377–400

Patterns of Cenozoic sediment flux from western Scandinavia: discussion

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