Composite biostratigraphy of the Hauterivian-Ryazanian interval in the Iris-1 (5604/30b1) well, Danish sector, North Sea

Karen Dybkjær; David Jutson

Composite biostratigraphy of the Hauterivian-Ryazanian interval in the Iris-1 (5604/30b1) well, Danish sector, North Sea

Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › peer-review

1 Citation (Scopus)

Abstract

The Iris-1 well located in the Iris Basin, a subbasin of the Danish Central Graben, is one of the few wells in this area to have been drilled in a basinal setting. The well penetrated a thick interval of claystones and sandy claystones of Ryazanian to Hauterivian age (nannofossil zones BC1-BC11 of BOWN et al. 1998). The interval investigated represents the upper part of the Farsund Formation and the lower part of the Åsgard Formation. An integrated biostratigraphic study (nannofossils, palynology and microfauna) has been undertaken on the interval to produce a composite biostratigraphy which has affinities to schemes from both England and northern Germany. Based on the biostratigraphic results a lower section of Ryazanian to Early Valanginian age was identified. This is succeeded by an upper section of Early to Late Hauterivian age. Condensed or missing sections in the Late Valanginian have been documented from a range of settings in the North Sea region. Recognition of this unconformity in such a basinal setting in the Danish Central Graben supports the regional significance of this event.

Original language	English
Title of host publication	Proceedings of the 8th International Nannoplankton Association Conference, Bremen, Sept. 11-15, 2000
Editors	Gerard Versteegh, Helmut Willems
Publisher	Senckenberg Nature Research Society
Pages	1-10
Number of pages	10
ISBN (Print)	9783510613618, 3510613619
Publication status	Published - 29 Dec 2003
Event	8th International Nannoplankton Association Conference - Bremen, Germany Duration: 11 Sept 2000 → 15 Sept 2000 Conference number: 8

Publication series

Series	Courier Forschungsinstitut Senckenberg
Number	244
ISSN	0341-4116

Conference

Conference	8th International Nannoplankton Association Conference
Country/Territory	Germany
City	Bremen
Period	11/09/00 → 15/09/00

Keywords

Calcareous nannofossils
Foraminifera
Lower Cretaceous
North Sea
Palynology
Radiolaria

Programme Area

Programme Area 3: Energy Resources

Cite this

Dybkjær, Karen ; Jutson, David. / Composite biostratigraphy of the Hauterivian-Ryazanian interval in the Iris-1 (5604/30b1) well, Danish sector, North Sea. Proceedings of the 8th International Nannoplankton Association Conference, Bremen, Sept. 11-15, 2000. editor / Gerard Versteegh ; Helmut Willems. Senckenberg Nature Research Society, 2003. pp. 1-10 (Courier Forschungsinstitut Senckenberg; No. 244).

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title = "Composite biostratigraphy of the Hauterivian-Ryazanian interval in the Iris-1 (5604/30b1) well, Danish sector, North Sea",

abstract = "The Iris-1 well located in the Iris Basin, a subbasin of the Danish Central Graben, is one of the few wells in this area to have been drilled in a basinal setting. The well penetrated a thick interval of claystones and sandy claystones of Ryazanian to Hauterivian age (nannofossil zones BC1-BC11 of BOWN et al. 1998). The interval investigated represents the upper part of the Farsund Formation and the lower part of the {\AA}sgard Formation. An integrated biostratigraphic study (nannofossils, palynology and microfauna) has been undertaken on the interval to produce a composite biostratigraphy which has affinities to schemes from both England and northern Germany. Based on the biostratigraphic results a lower section of Ryazanian to Early Valanginian age was identified. This is succeeded by an upper section of Early to Late Hauterivian age. Condensed or missing sections in the Late Valanginian have been documented from a range of settings in the North Sea region. Recognition of this unconformity in such a basinal setting in the Danish Central Graben supports the regional significance of this event.",

keywords = "Calcareous nannofossils, Foraminifera, Lower Cretaceous, North Sea, Palynology, Radiolaria",

author = "Karen Dybkj{\ae}r and David Jutson",

year = "2003",

month = dec,

day = "29",

language = "English",

isbn = "9783510613618",

series = "Courier Forschungsinstitut Senckenberg",

publisher = "Senckenberg Nature Research Society",

number = "244",

pages = "1--10",

editor = "Gerard Versteegh and Helmut Willems",

booktitle = "Proceedings of the 8th International Nannoplankton Association Conference, Bremen, Sept. 11-15, 2000",

note = "8th International Nannoplankton Association Conference ; Conference date: 11-09-2000 Through 15-09-2000",

}

Dybkjær, K & Jutson, D 2003, Composite biostratigraphy of the Hauterivian-Ryazanian interval in the Iris-1 (5604/30b1) well, Danish sector, North Sea. in G Versteegh & H Willems (eds), Proceedings of the 8th International Nannoplankton Association Conference, Bremen, Sept. 11-15, 2000. Senckenberg Nature Research Society, Courier Forschungsinstitut Senckenberg, no. 244, pp. 1-10, 8th International Nannoplankton Association Conference, Bremen, Bremen, Germany, 11/09/00.

Composite biostratigraphy of the Hauterivian-Ryazanian interval in the Iris-1 (5604/30b1) well, Danish sector, North Sea. / Dybkjær, Karen; Jutson, David.
Proceedings of the 8th International Nannoplankton Association Conference, Bremen, Sept. 11-15, 2000. ed. / Gerard Versteegh; Helmut Willems. Senckenberg Nature Research Society, 2003. p. 1-10 (Courier Forschungsinstitut Senckenberg; No. 244).

Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › peer-review

TY - GEN

T1 - Composite biostratigraphy of the Hauterivian-Ryazanian interval in the Iris-1 (5604/30b1) well, Danish sector, North Sea

AU - Dybkjær, Karen

AU - Jutson, David

N1 - Conference code: 8

PY - 2003/12/29

Y1 - 2003/12/29

N2 - The Iris-1 well located in the Iris Basin, a subbasin of the Danish Central Graben, is one of the few wells in this area to have been drilled in a basinal setting. The well penetrated a thick interval of claystones and sandy claystones of Ryazanian to Hauterivian age (nannofossil zones BC1-BC11 of BOWN et al. 1998). The interval investigated represents the upper part of the Farsund Formation and the lower part of the Åsgard Formation. An integrated biostratigraphic study (nannofossils, palynology and microfauna) has been undertaken on the interval to produce a composite biostratigraphy which has affinities to schemes from both England and northern Germany. Based on the biostratigraphic results a lower section of Ryazanian to Early Valanginian age was identified. This is succeeded by an upper section of Early to Late Hauterivian age. Condensed or missing sections in the Late Valanginian have been documented from a range of settings in the North Sea region. Recognition of this unconformity in such a basinal setting in the Danish Central Graben supports the regional significance of this event.

AB - The Iris-1 well located in the Iris Basin, a subbasin of the Danish Central Graben, is one of the few wells in this area to have been drilled in a basinal setting. The well penetrated a thick interval of claystones and sandy claystones of Ryazanian to Hauterivian age (nannofossil zones BC1-BC11 of BOWN et al. 1998). The interval investigated represents the upper part of the Farsund Formation and the lower part of the Åsgard Formation. An integrated biostratigraphic study (nannofossils, palynology and microfauna) has been undertaken on the interval to produce a composite biostratigraphy which has affinities to schemes from both England and northern Germany. Based on the biostratigraphic results a lower section of Ryazanian to Early Valanginian age was identified. This is succeeded by an upper section of Early to Late Hauterivian age. Condensed or missing sections in the Late Valanginian have been documented from a range of settings in the North Sea region. Recognition of this unconformity in such a basinal setting in the Danish Central Graben supports the regional significance of this event.

KW - Calcareous nannofossils

KW - Foraminifera

KW - Lower Cretaceous

KW - North Sea

KW - Palynology

KW - Radiolaria

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M3 - Conference article in proceedings

SN - 9783510613618

SN - 3510613619

T3 - Courier Forschungsinstitut Senckenberg

SP - 1

EP - 10

BT - Proceedings of the 8th International Nannoplankton Association Conference, Bremen, Sept. 11-15, 2000

A2 - Versteegh, Gerard

A2 - Willems, Helmut

PB - Senckenberg Nature Research Society

T2 - 8th International Nannoplankton Association Conference

Y2 - 11 September 2000 through 15 September 2000

ER -

Dybkjær K, Jutson D. Composite biostratigraphy of the Hauterivian-Ryazanian interval in the Iris-1 (5604/30b1) well, Danish sector, North Sea. In Versteegh G, Willems H, editors, Proceedings of the 8th International Nannoplankton Association Conference, Bremen, Sept. 11-15, 2000. Senckenberg Nature Research Society. 2003. p. 1-10. (Courier Forschungsinstitut Senckenberg; No. 244).

Composite biostratigraphy of the Hauterivian-Ryazanian interval in the Iris-1 (5604/30b1) well, Danish sector, North Sea

Abstract

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Conference

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