Investigations on the Peach 4 Debrite, a Late Pleistocene Mass Movement on the Northwest British Continental Margin

Owen, M.; Day, S.; Long, D.; Maslin, M.. 2010 Investigations on the Peach 4 Debrite, a Late Pleistocene Mass Movement on the Northwest British Continental Margin. In: Mosher, David C., (ed.) Submarine mass movements and their consequences. Springer, 301-311.

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Abstract/Summary

The Peach 4 debrite is the most recent in a series of large scale Pleistocene MTDs within the Barra fan on the northwest British continental margin. Geophysical data indicate that Peach 4 was formed through a combination of blocky and muddy debris flows and affects an area of ~ 700 km2. BGS core sample 56 -10 36, located directly over the Peach 4 debrite, provides a minimum age of 14.68 ka cal BP for the last major failure. An upwards fining turbidite sequence in BGS core sample 56 -10 239 is associ-ated with increased As and S concentrations, indicators of diagenetic pyrite which forms under anoxic conditions. It is proposed that As and S concentrations may pro-vide a method of distinguishing between contourite and turbidite sedimentation, though further research is required.

Item Type:	Publication - Book Section
Digital Object Identifier (DOI):	10.1007/978-90-481-3071-9_25
Programmes:	BGS Programmes 2009 > Marine Geoscience
ISBN:	9789048130702
Additional Keywords:	Submarine mass movement, submarine landslide, mass transport deposit, debrite, debris flow, turbidite, Barra fan, British ice sheet, arsenic, sulphur, pyrite
NORA Subject Terms:	Earth Sciences Marine Sciences
Date made live:	23 Aug 2013 15:17 +0 (UTC)
URI:	https://nora.nerc.ac.uk/id/eprint/503049

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