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Halokinetic initiation of Mesozoic tectonics in the southern North Sea: a regional model

Published online by Cambridge University Press:  01 May 2009

M. R. Allen
Affiliation:
Institute of Earth Studies, Llandinam Building, University of Wales, Aberystwyth, Dyfed SY23 3DB, UK
P. A. Griffiths
Affiliation:
Institute of Earth Studies, Llandinam Building, University of Wales, Aberystwyth, Dyfed SY23 3DB, UK
J. Craig
Affiliation:
LASMO plc, 100, Liverpool Street, London EC2M 2BB, UK
W. R. Fitches
Affiliation:
Institute of Earth Studies, Llandinam Building, University of Wales, Aberystwyth, Dyfed SY23 3DB, UK
R. J. Whittington
Affiliation:
Institute of Earth Studies, Llandinam Building, University of Wales, Aberystwyth, Dyfed SY23 3DB, UK

Abstract

The North Dogger Fault Zone is located at the northern margin of the UK Southern North Sea Basin, at the edge of the mobile Zechstein Supergroup, and was particularly active during late Triassic and early Jurassic times. It resembles geometrically, and is related tectonically to, the Dowsing Fault Zone which was initiated in late Scythian time along the southwestern edge of the mobile salt. It is proposed that both of these basin-bounding fault systems were initiated in response to the buoyant growth of salt swells in the centre of the Southern North Sea Basin. Passive folding of the Triassic strata over the swells, which accommodated the shape changes caused by halokinesis, led to extension on the fault zones at the edge of the mobile Zechstein salt.

Type
Rapid Communications
Copyright
Copyright © Cambridge University Press 1994

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