Scandinavia, Greenland and adjacent margin
Published:January 01, 2002
2002. "Scandinavia, Greenland and adjacent margin", 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 relation between Scandinavian landforms and Cenozoic uplift events is examined by analysis of digital elevation data in a regional geological context as well as in a geomorphological process perspective. Re-exposed flat sub-Cambrian and sub-Mesozoic hilly relief aids in deciphering uplift and erosional events. The highly dissected mountains of the Northern Scandes (NS) rise maximally 1500 m above a slightly tilted lowest level continuing in the Muddus plains eastwards at 300-550m above sea level (a.s.l.). This level is correlated with the lowest, slightly warped level of the Palaeic relief at 1000 -1300 m a. s.l. of the Southern Scandes (SS), over which mountains of similar height rise. This lowest surface is thought to be the end result of Paleogene erosion to the general base level. Northern Scandinavia with the NS and the Muddus plains acted as a block that was progressively tilted to the SE, whereas the Southern Scandes experienced continuous doming, with a major uplift event of about 1000 m in Neogene time causing deep valley incision in the uplifted plateau. The South Swedish Dome emerged from its Palaeozoic and Mesozoic cover in Neogene time and still retains well-preserved re-exposed palaeosurfaces.
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.