A structural transect between the central North Sea Dome and the South Swedish Dome: Middle Jurassic-Quaternary uplift-subsidence reversal and exhumation across the eastern North Sea Basin
Published:January 01, 2002
Ole Graversen, 2002. "A structural transect between the central North Sea Dome and the South Swedish Dome: Middle Jurassic-Quaternary uplift-subsidence reversal and exhumation across the eastern North Sea Basin", Exhumation of the North Atlantic Margin: Timing, Mechanisms and Implications for Petroleum Exploration, A. G. Doré, J. A. Cartwright, M. S. Stoker, J. P. Turner, N. White
Download citation file:
The Jurassic-Cenozoic structural evolution of the eastern North Sea Basin is influenced by the central North Sea Dome, the Danish Megablock, the Tornquist Zone and the South Swedish Dome. The central North Sea Dome is a composite dome comprising the Triple Junction Dome, the Central Graben Dome and the Friesland Dome. The Danish Megablock, newly recognized here, is a first-order tectonic element between the Central Graben and the Tornquist Zone. In Jurassic-Cretaceous time it was tilted towards the east during uplift of the Central Graben Dome, whereas the movement was reversed during the Cenozoic post-rift subsidence. Contemporaneous with the westward tilting of the Danish Megablock, the South Swedish Dome was uplifted to the east. The uplift-subsidence reversal across the eastern North Sea Basin links the collapse of the Central Graben Dome and the tilt reversal of the Danish Megablock with the uplift of the South Swedish Dome. The uplift followed by subsidence probably involved mass flow in the asthenosphere to account for the observed balance between post-rift subsidence and marginal uplift. The model explains the uplift of both the South Swedish Dome and southern England as the result of Cenozoic post-rift subsidence of the Mesozoic Central Graben Dome.
Figures & Tables
Exhumation of the North Atlantic Margin: Timing, Mechanisms and Implications for Petroleum Exploration
Northwest Europe has undergone repeated episodes of exhumation (the exposure of formerly buried rocks) due to such factors as post-orogenic unroofing, rift-shoulder uplift, hotspot activity, compressive tectonics, eustatic sea-level change, glaciation and isostatic readjustment. The main observational legacy of this exhumation around the North Atlantic is preserved in the comparatively young (Mesozoic and Cenozoic) geological record of this region. Despite a rapid increase in the understanding of the exhumation of this area, there are still many unknowns: the relative intensity of the various phases and their geographical variation; mechanisms of uplift; primary causes of exhumation. Tied to these problems is the larger-scale question of whether the circum-North Atlantic is unique or whether its behaviour is typical for passive margins.
There have been several attempts in recent years to bring together researchers to address these questions, but these have often focused on one particular geographical area or one particular exhumation phase. Before an integrated story can emerge, disciplines that have traditionally remained apart need to come together: geomorphology and offshore seismic interpretation; Palaeogene and Neogene studies; Scandinavian and British-Irish research schools. This volume represents a first step in this direction by providing an inter-disciplinary set of studies over a wide latitudinal range of the NW European margin.
The studies presented here are based on a variety of techniques that have been employed to address the main concerns of North Atlantic exhumation history, including timing, mechanisms and the sedimentary response of the continental margin. The 25 papers presented in this volume have been arranged in four sections to reflect the highly varied approach to this subject and the commercial implications. Part 1 is concerned with exhumation mechanisms, focusing primarily on the Iceland Plume. Parts 2 and 3 present ongoing research on the continental margin record offshore Scandinavia, Britain, Ireland and the Faroes. The papers in these two parts illustrate the communication that is now occurring between the two regional research schools and the acknowledgement of a multiphase Cenozoic denudation chronology for both areas. Part 4 contains five papers describing the significant changes to the hydrocarbon systems that occur in exhumed basins, detailing the implications for hydrocarbon-bearing basins.
Exhumation of the North Atlantic Margin: Timing, Mechanisms and Implications for Petroleum Exploration is the most up-to-date and complete volume integrating all aspects of the Mesozoic-Cenozoic exhumation of North Atlantic borderlands. Itwill be of interest to those within the oil industry, geomorphologists and other workers with an interest in NW European regional geology.