Geological Survey of Denmark and Greenland Bulletin 12 - 2007

Bulletin

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

Poul Schiøler, Jan Andsbjerg, Ole R. Clausen, Gregers Dam, Karen Dybkjær, Lars Hamberg, Claus Heilmann-Clausen, Erik P. Johannessen, Lars E. Kristensen, Iain Prince and Jan A. Rasmussen

In the mid-1990s, hydrocarbon exploration in the Danish sector of the North Sea shifted from Mesozoic targets to the lower Cenozoic, particularly in the so-called 'Siri Canyon', an erosional feature incised into the top of the Chalk on the eastern flank of the Central Graben. Intensive drilling activity in subsequent years has provided a wealth of new information concerning the nature of the Cenozoic sedimentary succession in this region and has also illustrated the need for a refined, up-dated lithostratigraphic framework.

This bulletin presents the lithostratigraphy of the marine siliciclastic Palaeogene – Lower Neogene succession of the Danish North Sea. Existing groups (three) and formations (seven) defined elsewhere in the North Sea region are adopted and supplied with reference wells; eleven new members are defined from the Danish North Sea succession.

Abstract

Schiøler, P., Andsbjerg, J., Clausen, O.R., Dam, G., Dybkjær, K., Hamberg, L., Heilmann-Clausen, C., Johannessen, E.P., Kristensen, L.E., Prince, I. & Rasmussen, J.A. 2007: Lithostratigraphy of the Palaeogene – Lower Neogene succession of the Danish North Sea. Geological Survey of Denmark and Greenland Bulletin 12, 77 pp. + 5 plates.

As a result of a lithological, sedimentological and biostratigraphic study of well sections from the Danish sector of the North Sea, including some recently drilled exploration wells on the Ringkøbing–Fyn High, the lithostratigraphic framework for the siliciclastic Palaeogene to Lower Neogene sediments of the Danish sector of the North Sea is revised. The sediment package from the top of the Chalk Group to the base of the Nordland Group is subdivided into seven formations containing eleven new members. The existing Våle, Lista, Sele, Fur, Balder, Horda and Lark Formations of previously published lithostratigraphic schemes are adequate for a subdivision of the Danish sector at formation level. Bor is a new sandstone member of the Våle Formation. The Lista Formation is subdivided into three new mudstone members: Vile, Ve and Bue, and three new sandstone members: Tyr, Idun and Rind. Kolga is a new sandstone member of the Sele Formation. Hefring is a new sandstone member of the Horda Formation. Freja and Dufa are two new sandstone members of the Lark Formation. Danish reference sections are established for the formations, and the descriptions of their lithology, biostratigraphy, age and palaeoenvironmental setting are updated.

Authors’ addresses

P.S.*, J.A., K.D. & L.E.K.
Geological Survey of Denmark and Greenland
Øster Voldgade 10, DK-1350 Copenhagen K, Denmark.
* Present address:
GNS Science
1 Fairway Drive
Avalon, P.O. Box 30368, Lower Hutt, New Zealand.
Mail: p.schioler@gns.cri.nz

O.R.C. & C.H.-C.
Department of Earth Sciences, University of Aarhus
Høegh-Guldbergs-gade 2, DK-8000 Århus C, Denmark.

G.D. & L.H.
DONG Energy
Agern Allé 24–26, DK-2970 Hørsholm, Denmark.

I.P. & E.P.J.
Statoil Norway
Forusbeen 50, N-4035 Stavanger, Norway.

J.A.R.
Geological Museum, University of Copenhagen
Øster Voldgade 5–7, DK-1350 Copenhagen K, Denmark.

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