Late Weichselian glaciation history of the northern North Sea

Boreas ◽  
2008 ◽  
Vol 23 (1) ◽  
pp. 1-13 ◽  
Author(s):  
HANS PETTER SEJRUP ◽  
HAFLIDI HAFLIDASON ◽  
INGE AARSETH ◽  
EDWARD KING ◽  
CARL FREDRIK FORSBERG ◽  
...  
Boreas ◽  
2008 ◽  
Vol 29 (4) ◽  
pp. 315-328 ◽  
Author(s):  
SIMON J. CARR ◽  
HAFLIDI HAFLIDASON ◽  
HANS PETTER SEJRUP

Clay Minerals ◽  
1990 ◽  
Vol 25 (4) ◽  
pp. 519-541 ◽  
Author(s):  
M. J. Pearson

AbstractClay mineral abundances in Mesozoic and Tertiary argillaceous strata from 15 exploration wells in the Inner and Outer Moray Firth, Viking Graben and East Shetland Basins of the northern North Sea have been determined in <0·2 µm fractions of cuttings samples. The clay assemblages of more deeply-buried samples cannot be unambiguously related to sedimentary input because of the diagenetic overprint which may account for much of the chlorite and related interstratified minerals. Other sediments, discussed on a regional basis and related to the geological history of the basins, are interpreted in terms of clay mineral provenance and control by climate, tectonic and volcanic activity. The distribution of illite-smectite can often be related to volcanic activity both in the Forties area during the M. Jurassic, and on the NE Atlantic continental margin during the U. Cretaceous-Early Tertiary which affected the North Sea more widely and left a prominent record in the Viking Graben and East Shetland Basin. Kaolinite associated with lignite-bearing sediments in the Outer Moray Firth Basin was probably derived by alteration of volcanic material in lagoonal or deltaic environments. Some U. Jurassic and L. Cretaceous sediments of the Inner Moray Basin are rich in illite-smectite, the origin of which is not clear.


The history of the development of the hydrocarbon resources of the North Sea is reviewed in an environmental context. The development of impact assessment techniques and practices and the evolution of monitoring of the physical, chemical and biological environment offshore and onshore, with reference to platforms, subsea pipelines, pipeline landfalls and terminal construction and operation is discussed. A brief account of the development of environmental protection management practices and their application to the design, construction, operation and management of major production projects follows. The paper concludes with a look at the environmental conditions likely to be established as the industry moves into the northern North Sea and areas such as the West Shetland Basin, and their significance for the petroleum industry.


2009 ◽  
Vol 28 (5-6) ◽  
pp. 469-483 ◽  
Author(s):  
W.A.H. Lekens ◽  
H. Haflidason ◽  
H.P. Sejrup ◽  
A. Nygard ◽  
T. Richter ◽  
...  

1998 ◽  
Vol 152 (1-3) ◽  
pp. 189-215 ◽  
Author(s):  
H Haflidason ◽  
E.L King ◽  
H.P Sejrup

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