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The AAPG/Datapages Combined Publications Database
AAPG Bulletin
Abstract
AAPG Bulletin, V.
The Role of
Fault
Interaction and Linkage in Controlling Synrift
Stratigraphic Sequences: Late Jurassic, Statfjord East Area, Northern North Sea 1
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2Department of Geology and Geophysics, University of Edinburgh, Grant Institute, The King's Buildings, West Mains Road, Edinburgh EH9 3JW, Scotland, United Kingdom; e-mail: [email protected]; [email protected]
ABSTRACT
Examination of well-constrained three-dimensional seismic data demonstrates the role of
fault
interaction and linkage in controlling the nature of synrift sequences on the
hanging wall of the Statfjord East
fault
, a typical Late Jurassic structure in the
northern North Sea Brent province. Al though now a single
fault
, the Statfjord East
fault
originally consisted of several en echelon segments, each of which defined individual
subbasins. Structural and stratigraphic evidence, both along and across
fault
strike,
indicates that the
fault
resulted from segment propagation, interaction, and linkage.
Facies architecture, thickness variations, and the internal character of synrift
formations are temporally and spatially related to the subbasin geometry. Variations in
displacement along the
fault
segments exhibit characteristics of interacting en echelon
faults, including anomalous displacement gradients in regions of segment overlap. We
attribute the observed shifts in depocenters to local enhancement of displacement rates,
resulting from the interaction of neighboring
fault
segments. The results have
far-reaching consequences for synrift plays in the northern North Sea because they imply
that only from the perspective of
fault
growth and linkage can the Late Jurassic structure
and stratigraphy be fully understood.
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