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3D seismic analysis of buried tunnel valleys in the Central North Sea: tunnel valley fill sedimentary architecture

Stewart, M.; Lonergan, L.; Hampson, G.. 2012 3D seismic analysis of buried tunnel valleys in the Central North Sea: tunnel valley fill sedimentary architecture. In: Huuse, M., (ed.) Glaciogenic reservoirs and hydrocarbon systems. Geological Society of London, 173-184. (Geological Society Special Publications, 368).

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Abstract/Summary

Fourteen overlapping 3D seismic reflection data sets, originally acquired by the oil and gas industry, were used to image and investigate complex networks of buried tunnel valleys in the UK sector of the Central North Sea. More than 180 individual tunnel valleys were observed and mapped to horizontal resolutions of 12–50 m and vertical resolutions of 8–10 m. The results presented here identify three recurring seismic facies that locally define stratigraphic organization from base to top of the buried tunnel valley fills: (i) high-amplitude disrupted units, (ii) a unit containing gently dipping disrupted reflections or transparent facies and (iii) well-layered continuous reflections. A comparison to similar works in the region is used to infer tunnel valley infill during changing depositional conditions from high-energy subglacial meltwater to quiet glaciolacustrine or glaciomarine environments.

Item Type: Publication - Book Section
Digital Object Identifier (DOI): 10.1144/SP368.9
Programmes: BGS Programmes 2010 > Marine Geoscience
ISSN: 0305-8719
Date made live: 06 Feb 2013 09:38 +0 (UTC)
URI: http://nora.nerc.ac.uk/id/eprint/500005

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