Upper Cainozoic stratigraphy in the central North Sea (Ekofisk and Sleipner fields)

Eidvin, Tor; Riis, Fridtjof; Rundberg, Yngve

doi:10.1080/002919699433843

Cited by 37 publications

(37 citation statements)

References 29 publications

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“…2), a zonation of benthic foraminiferal assemblages has been established by Doppert (1980). Other foraminiferal zonations have been compiled for the North Sea Cenozoic by King (1983King ( , 1989, Gradstein & Backström (1996) and Eidvin et al (1999). For the Pliocene and Pleistocene, these zonations are mainly based on benthic foraminifers.…”

Section: Bmentioning

confidence: 99%

Integrated chronostratigraphy of the Pliocene-Pleistocene interval and its relation to the regional stratigraphical stages in the southern North Sea region

Kuhlmann

Langereis

Munsterman³

et al. 2006

Netherlands Journal of Geosciences

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Time-stratigraphic interpretations of Late Pliocene to Early Pleistocene sediments from onshore locations and from marginal marine settings of the North Sea Basin often refer to the subdivision of the Dutch and British ’Quaternary’ regional stratigraphic stages. Since age control for these stages and their stage boundaries are based on relative dating methods, in this study pollen, dinoflagellate cysts and foraminiferal assemblages were investigated to correlate the regional stratigraphic stages independently to the global chronostratigraphy and the paleomagnetic timescale. The data were obtained from eight boreholes located in the depocentre setting of the Late Pliocene North Sea Basin comprising a 1000 m thick sedimentary succession. The British Gedgravian and Waltonian stages, the Dutch Reuverian to Brunssumian as well as published foraminiferal zones (NSB 14, FB and the lower part of the FA2 zone) fall within the Zanclean and Piacenzian. The lower boundaries of the Pre-Ludhamian and Pretiglian stages and of the NSB 14 to 15 zones are close to the paleomagnetic Gauss-Matuyama boundary. The Pre-Ludhamian, Ludhamian, Thurnian and the Pretiglian, Tiglian A and Tiglian B stages presumably cover the marine isotope stages 103 to 95. It is proposed that the Ludhamian, Thurnian and the Tiglian A were short lasting, warm, periods during which sea level highstand facilitated sedimentary deposition at the marginal areas of the North Sea Basin. The lower boundary of the paleomagnetic Olduvai subchron is situated in the Tiglian Cl-4b stage while the TC4c stage is found within the Olduvai subchron. Foraminiferal NSB 15 and NSB 16 zone as well as the upper part of the FA2 and FA1 zone fall within the Gelasian and cover the Matuyama chron as well as the lower part of the Olduvai subchron. Comparison with formerly dated North Sea sediments shows a good agreement between foraminiferal zonations on a broader scale but significant differences in absolute ages occur. Strontium isotope values indicate approximately 1 Ma younger ages as expected from our chronostratigraphic model. This discrepancy is explained by the dominance of freshwater from river discharge contributing high amounts of eroded material to the basin, leading to an increase of the 87Sr/86Sr ratio in the shelf-sea water.

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Section: Bmentioning

confidence: 99%

Integrated chronostratigraphy of the Pliocene-Pleistocene interval and its relation to the regional stratigraphical stages in the southern North Sea region

Kuhlmann

Langereis

Munsterman³

et al. 2006

Netherlands Journal of Geosciences

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“…' Attempts at mapping into the UK sector from the Norwegian sector by Ottesen et al (2014) identified the base Quaternary as equivalent to the base-NAUST at 2.7 Ma. This method correlated the two through the locally extensive unconformity at the top of the Upper Miocene to Lower Pliocene Utsira Formation, but this relationship assumes that middle to late Pliocene deposits are absent, which is not the case (Eidvin et al 1999). Towards the southern half of the basin the Quaternary is preceded by an extensive Pliocene wedge (Cameron et al 1992;Rasmussen et al 2005;Thöle et al 2014;Harding 2015; Table 1).…”

Section: Chronostratigraphic Calibrationmentioning

confidence: 99%

The early Quaternary North Sea Basin

Lamb

Harding

Huuse

et al. 2017

JGS

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The onset of the Quaternary (2.58 Ma) corresponds to significant paleo-environmental events, such as the intensification and southward extension of Northern Hemisphere glaciation. In the North Sea Basin a significant late Cenozoic succession has been identified as a high-resolution archive of paleo-environmental changes during the Pliocene and Pleistocene. However, the identification of the base of the Quaternary has been a long-standing issue owing to lack of stratigraphic calibration. This study incorporates continuous, regional 3D seismic data with high-quality chronostratigraphic markers to map the base-Quaternary surface at high resolution across the entire North Sea. Depth conversion, backstripping, seismic geomorphology and sedimentation rate calculations are integrated to analyse the paleogeographical evolution of the North Sea Basin and its infill of c. 83 × 10 3 km 3 of northward prograding marine to deltaic sediments. The basin is 600 km long from SSE to NNW and largely localized above residual topography of the Mesozoic graben system. During the earliest Quaternary (2.58 -2.35 Ma) paleo-water depths were c. 300 ± 50 m and solid sedimentation rates (calculated from 0% porosity) c. 32 km 3 ka −1 . The base-Quaternary provides an important marker for further studies of the changing environment of the Quaternary of NW Europe as well as resource and shallow geohazard analysis.Supplementary material: A base Quaternary two-way travel time structure map is available at https://doi.org/10.6084/m9. figshare.c.3900343

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“…The Nordland Group overlies the Hordaland Group and comprises the basal, dominantly sandy Utsira Sand, and overlying dominantly argillaceous units (unnamed). It is locally over 1500 m thick with strata ranging in age from late Middle Miocene through Holocene (Eidvin et al, 1999;Isaksen & Tonstad, 1989).…”

Section: Geological Backgroundmentioning

confidence: 98%

“…The upper part of the Utsira Sand has been variously dated as Late Miocene (Gregersen, Michelsen, & Sørensen, 1997, fig. 3;Isaksen & Tonstad, 1989), Early Pliocene (Eidvin & Rundberg, 2001;Piasecki, Gregersen, & Johanessen, 2002), or early Late Pliocene (Eidvin, Jansen, Rundberg, Brekke, & Grogan, 2000;Eidvin, Riis, & Rundberg, 1999;Eidvin, Rundberg, & Smelror, 2002). The base of the Nordland Group mudstones has been dated as Late Miocene (Gregersen et al, 1997, fig. 3) or early Late Pliocene (Eidvin et al, 1999).…”

Section: Introductionmentioning

confidence: 96%

Palynological and foraminiferal biostratigraphy of (Upper Pliocene) Nordland Group mudstones at Sleipner, northern North Sea

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Eidvin³

et al. 2004

Marine and Petroleum Geology

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Upper Cainozoic stratigraphy in the central North Sea (Ekofisk and Sleipner fields)

Cited by 37 publications

References 29 publications

Integrated chronostratigraphy of the Pliocene-Pleistocene interval and its relation to the regional stratigraphical stages in the southern North Sea region

Integrated chronostratigraphy of the Pliocene-Pleistocene interval and its relation to the regional stratigraphical stages in the southern North Sea region

The early Quaternary North Sea Basin

Palynological and foraminiferal biostratigraphy of (Upper Pliocene) Nordland Group mudstones at Sleipner, northern North Sea

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