PT  - JOURNAL ARTICLE
AU  - Jackson, C. A.-L.
TI  - Application of three-dimensional seismic data to documenting the scale, geometry and distribution of soft-sediment features in sedimentary basins: an example from the Lomre Terrace, offshore Norway
AID  - 10.1144/GSL.SP.2007.277.01.15
DP  - 2007 Jan 01
TA  - Geological Society, London, Special Publications
PG  - 253--267
VI  - 277
IP  - 1
4099  - http://sp.lyellcollection.org/content/277/1/253.short
4100  - http://sp.lyellcollection.org/content/277/1/253.full
SO  - Geological Society, London, Special Publications2007 Jan 01; 277
AB  - Three-dimensional seismic data are used to document the geometry, scale and distribution of soft-sediment deformation features in the post-rift succession of the Lomre Terrace, offshore Norway. In the Cretaceous to Upper Oligocene succession a polygonal fault network, developed in the in response to compaction and dewatering of the interval, was mapped using dip and azimuth grid-based attributes. In the same stratigraphic interval a series of chaotic seismic reflection packages are developed which are visualized using a volume-based seismic coherency attribute and interpreted as the seismic expression of mobilized mud masses. Immediately overlying the mobilized mud masses are a series of fault-bounded depressions that are interpreted to have formed in response to deflation of the mobilized mud masses caused by loading of the overlying succession. A series of shallow, curvilinear erosion surfaces are present on the seismic horizon bounding the top of the Pliocene succession and represent iceberg-keel plough marks. This study demonstrates that interpretation and visualization of three-dimensional seismic data coupled with attribute analysis provide valuable insights into soft-sediment deformation features in sedimentary basins, in particular the scale, geometry and distribution of such features and their temporal and spatial inter-relationships.