Brent Group: Sequence stratigraphy and regional implications

B. C. Mitchener, D. A. Lawrence, M. A. Partington, M. B J Bowman, J. Gluyas

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

Previous published models for the stratigraphic evolution of the Middle Jurassic (Aalenian - Bathonian) Brent Group and its equivalents rely largely upon lithostratigraphy, with few reliable time lines for correlation across the Northern North Sea basin. To rectify this a new, largely well-based, multi-disciplinary regional study was undertaken, combining detailed biostratigraphic and sedimentological data from more than 450 wells across the whole of the Northern North Sea basin. A basin-wide sequence stratigraphy for the Middle Jurassic has been developed, comprising two tectono-stratigraphic units (J20, Aalenian - Late Bajocian and J30, latest Bajocian - Middle Callovian), subdivided into five sequences: J22 (Aalenian), J24 (Early Bajocian), J26 (Early - Late Bajocian), J32 (latest Bajocian - Late Bathonian) and J34 (latest Bathonian - Middle Callovian). The tectono-stratigraphic units developed in response to large scale (second order) tectonic processes: pre-rift thermal uplift (J20) and the onset of rifting (J30), whilst sequence development was controlled by a combination of changes in basin subsidence, sediment supply and eustatic sea level. A series of palaeogeographic and isopach maps outline the basin evolution and sedimentary response for each sequence. They describe a progressive basinward shift of the J22 and J24 depocentres in response to the thermal uplift; by the end of J26, sediment supply could not keep pace with increased basin subsidence caused by the crustal extension. J32 and J34 represent the first periods where active rifting can be clearly identified in the North Sea basin, with the development of tilted fault block geometries in the East Shetland Basin and Bruce - Beryl Embayment. Continued extension and rifting in these areas led to the development of an overall retrogradational system which extends through to the latest Jurassic. The study provides a model for North Sea basin evolution and a predictive sequence stratigraphic framework within which the local lithostratigraphy can be resolved and basin potential evaluated.

Original languageEnglish
Pages (from-to)45-80
Number of pages36
JournalGeological Society Special Publication
Volume61
DOIs
Publication statusPublished - 1992
Externally publishedYes

Fingerprint

Stratigraphy
Subsidence
sequence stratigraphy
Sediments
Bajocian
Sea level
Tectonics
Aalenian
basin
Bathonian
rifting
Callovian
Geometry
lithostratigraphy
Jurassic
basin evolution
subsidence
uplift
isopach map
beryl

ASJC Scopus subject areas

  • Water Science and Technology
  • Ocean Engineering
  • Geology

Cite this

Brent Group : Sequence stratigraphy and regional implications. / Mitchener, B. C.; Lawrence, D. A.; Partington, M. A.; Bowman, M. B J; Gluyas, J.

In: Geological Society Special Publication, Vol. 61, 1992, p. 45-80.

Research output: Contribution to journalArticle

Mitchener, B. C. ; Lawrence, D. A. ; Partington, M. A. ; Bowman, M. B J ; Gluyas, J. / Brent Group : Sequence stratigraphy and regional implications. In: Geological Society Special Publication. 1992 ; Vol. 61. pp. 45-80.
@article{0dfcca02a4b242ab83c232f09d6f7e06,
title = "Brent Group: Sequence stratigraphy and regional implications",
abstract = "Previous published models for the stratigraphic evolution of the Middle Jurassic (Aalenian - Bathonian) Brent Group and its equivalents rely largely upon lithostratigraphy, with few reliable time lines for correlation across the Northern North Sea basin. To rectify this a new, largely well-based, multi-disciplinary regional study was undertaken, combining detailed biostratigraphic and sedimentological data from more than 450 wells across the whole of the Northern North Sea basin. A basin-wide sequence stratigraphy for the Middle Jurassic has been developed, comprising two tectono-stratigraphic units (J20, Aalenian - Late Bajocian and J30, latest Bajocian - Middle Callovian), subdivided into five sequences: J22 (Aalenian), J24 (Early Bajocian), J26 (Early - Late Bajocian), J32 (latest Bajocian - Late Bathonian) and J34 (latest Bathonian - Middle Callovian). The tectono-stratigraphic units developed in response to large scale (second order) tectonic processes: pre-rift thermal uplift (J20) and the onset of rifting (J30), whilst sequence development was controlled by a combination of changes in basin subsidence, sediment supply and eustatic sea level. A series of palaeogeographic and isopach maps outline the basin evolution and sedimentary response for each sequence. They describe a progressive basinward shift of the J22 and J24 depocentres in response to the thermal uplift; by the end of J26, sediment supply could not keep pace with increased basin subsidence caused by the crustal extension. J32 and J34 represent the first periods where active rifting can be clearly identified in the North Sea basin, with the development of tilted fault block geometries in the East Shetland Basin and Bruce - Beryl Embayment. Continued extension and rifting in these areas led to the development of an overall retrogradational system which extends through to the latest Jurassic. The study provides a model for North Sea basin evolution and a predictive sequence stratigraphic framework within which the local lithostratigraphy can be resolved and basin potential evaluated.",
author = "Mitchener, {B. C.} and Lawrence, {D. A.} and Partington, {M. A.} and Bowman, {M. B J} and J. Gluyas",
year = "1992",
doi = "10.1144/GSL.SP.1992.061.01.05",
language = "English",
volume = "61",
pages = "45--80",
journal = "Geological Society Special Publication",
issn = "0305-8719",
publisher = "Geological Society of London",

}

TY - JOUR

T1 - Brent Group

T2 - Sequence stratigraphy and regional implications

AU - Mitchener, B. C.

AU - Lawrence, D. A.

AU - Partington, M. A.

AU - Bowman, M. B J

AU - Gluyas, J.

PY - 1992

Y1 - 1992

N2 - Previous published models for the stratigraphic evolution of the Middle Jurassic (Aalenian - Bathonian) Brent Group and its equivalents rely largely upon lithostratigraphy, with few reliable time lines for correlation across the Northern North Sea basin. To rectify this a new, largely well-based, multi-disciplinary regional study was undertaken, combining detailed biostratigraphic and sedimentological data from more than 450 wells across the whole of the Northern North Sea basin. A basin-wide sequence stratigraphy for the Middle Jurassic has been developed, comprising two tectono-stratigraphic units (J20, Aalenian - Late Bajocian and J30, latest Bajocian - Middle Callovian), subdivided into five sequences: J22 (Aalenian), J24 (Early Bajocian), J26 (Early - Late Bajocian), J32 (latest Bajocian - Late Bathonian) and J34 (latest Bathonian - Middle Callovian). The tectono-stratigraphic units developed in response to large scale (second order) tectonic processes: pre-rift thermal uplift (J20) and the onset of rifting (J30), whilst sequence development was controlled by a combination of changes in basin subsidence, sediment supply and eustatic sea level. A series of palaeogeographic and isopach maps outline the basin evolution and sedimentary response for each sequence. They describe a progressive basinward shift of the J22 and J24 depocentres in response to the thermal uplift; by the end of J26, sediment supply could not keep pace with increased basin subsidence caused by the crustal extension. J32 and J34 represent the first periods where active rifting can be clearly identified in the North Sea basin, with the development of tilted fault block geometries in the East Shetland Basin and Bruce - Beryl Embayment. Continued extension and rifting in these areas led to the development of an overall retrogradational system which extends through to the latest Jurassic. The study provides a model for North Sea basin evolution and a predictive sequence stratigraphic framework within which the local lithostratigraphy can be resolved and basin potential evaluated.

AB - Previous published models for the stratigraphic evolution of the Middle Jurassic (Aalenian - Bathonian) Brent Group and its equivalents rely largely upon lithostratigraphy, with few reliable time lines for correlation across the Northern North Sea basin. To rectify this a new, largely well-based, multi-disciplinary regional study was undertaken, combining detailed biostratigraphic and sedimentological data from more than 450 wells across the whole of the Northern North Sea basin. A basin-wide sequence stratigraphy for the Middle Jurassic has been developed, comprising two tectono-stratigraphic units (J20, Aalenian - Late Bajocian and J30, latest Bajocian - Middle Callovian), subdivided into five sequences: J22 (Aalenian), J24 (Early Bajocian), J26 (Early - Late Bajocian), J32 (latest Bajocian - Late Bathonian) and J34 (latest Bathonian - Middle Callovian). The tectono-stratigraphic units developed in response to large scale (second order) tectonic processes: pre-rift thermal uplift (J20) and the onset of rifting (J30), whilst sequence development was controlled by a combination of changes in basin subsidence, sediment supply and eustatic sea level. A series of palaeogeographic and isopach maps outline the basin evolution and sedimentary response for each sequence. They describe a progressive basinward shift of the J22 and J24 depocentres in response to the thermal uplift; by the end of J26, sediment supply could not keep pace with increased basin subsidence caused by the crustal extension. J32 and J34 represent the first periods where active rifting can be clearly identified in the North Sea basin, with the development of tilted fault block geometries in the East Shetland Basin and Bruce - Beryl Embayment. Continued extension and rifting in these areas led to the development of an overall retrogradational system which extends through to the latest Jurassic. The study provides a model for North Sea basin evolution and a predictive sequence stratigraphic framework within which the local lithostratigraphy can be resolved and basin potential evaluated.

UR - http://www.scopus.com/inward/record.url?scp=80052568947&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=80052568947&partnerID=8YFLogxK

U2 - 10.1144/GSL.SP.1992.061.01.05

DO - 10.1144/GSL.SP.1992.061.01.05

M3 - Article

AN - SCOPUS:80052568947

VL - 61

SP - 45

EP - 80

JO - Geological Society Special Publication

JF - Geological Society Special Publication

SN - 0305-8719

ER -