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TitreComparison of quaternary glaciogenic debris flows with blocky mass-transport deposits in Orphan Basin, offshore eastern Canada
AuteurLi, G; Campbell, C; Mosher, D; Piper, D J W
SourceSubmarine mass movements and their consequences; par Yamada, Y (éd.); Kawamura, K (éd.); Ikehara, K (éd.); Ogawa, Y (éd.); Urgeles, R (éd.); Mosher, D (éd.); Chaytor, J (éd.); Strasser, M (éd.); Advances in Natural and Technological Hazards Research vol. 31, 2012 p. 723-733, https://doi.org/10.1007/978-94-007-2162-3 64
Année2012
Séries alt.Secteur des sciences de la Terre, Contribution externe 20110055
ÉditeurSpringer Netherlands
Documentpublication en série
Lang.anglais
DOIhttps://doi.org/10.1007/978-94-007-2162-3 64
Mediapapier; en ligne; numérique
Formatspdf
ProvinceRégion extracotière de l'est
Lat/Long OENS -50.0000 -46.0000 50.0000 48.0000
Sujetscoulées de débris; dépôts de coulée de débris; sédiments marins; sédiments marins; dépôts glaciomarins; chenaux; gîtes en forme de traînée; levés sismiques marins; interpretations sismiques; géologie marine; géologie des dépôts meubles/géomorphologie; stratigraphie; Cénozoïque; Quaternaire
Illustrationslocation maps; profiles; tables
ProgrammeLa géoscience pour les développements extracôtiers de la côte est, Géoscience en mer
ProgrammeLe Programme de recherche et de développement énergétiques (PRDE)
Diffusé2011 09 15
Résumé(disponible en anglais seulement)
Quaternary deposits in southern Orphan Basin include complex mass transport deposits (MTD) comprising both glaciogenic debris flows (GDF) and blocky MTD. 3D seismic reflection data were used to highlight the difference between the two types of MTD. The main MTD in southern Orphan Basin were sourced from the slope off Trinity Trough in the west of the basin. On the Trinity Trough-mouth Fan, a succession of GDF was deposited above horizon B5, interpreted to date from Marine Isotope Stage (MIS) 12. Beyond the direct influence of Trinity Trough, MTD unit 2 below horizon B5 is confined within pre-existing channels, which are in approximately the same location as the modern Bonanza Channel and Sheridan Channel. Blocky MTD are characterized by linear and divergent basal grooves and chaotic internal facies. Dispersed blocks, less than 1 km2 in area, are commonly present within the blocky MTD on the southern Orphan slope. The tongue of the main Sheridan MTD is sharp-edged, with a series of closely spaced pressure ridges. 3D seismic data of GDFs show few features diagnostic of blocky MTD. Both stacked GDF lobes and channelized GDF are observed on Trinity Trough-mouth Fan.
GEOSCAN ID288677