GEOSCAN, résultats de la recherche


TitreScotian Slope mapping project: the benefits of an integrated regional high-resolution multibeam survey
AuteurPickrill, R; Piper, D J W; Collins, J; Kleiner, A; Gee, L
SourceProceedings - Offshore Technology Conference 2001, Paper 12995, 2001, 11 pages,
LiensGeology of the Scotian Margin
LiensGéologie de la Marge Néo-Écossaise
Séries alt.Commission géologique du Canada, Contributions aux publications extérieures 2001011
ÉditeurOffshore Technology Conference
Réunion2001 Offshore Technology Conference; Houston, TX; US; avril 30 - mai 3, 2001
Documentpublication en série
Mediapapier; en ligne; numérique
ProvinceRégion extracotière de l'est
Lat/Long OENS -64.0000 -52.0000 44.0000 42.0000
Sujetsbathymétrie; talus continental; morphologie; érosion; stabilité des pentes; schistes; géologie marine; sédimentologie
Illustrationsindex maps; bathymetric profiles; seismic reflection profiles
Diffusé2013 04 08
Résumé(disponible en anglais seulement)
A regional multibeam bathymetric and imagery survey of the Canadian Scotian Margin was performed by C & C Technologies, Inc. The survey was spearheaded by the Geological Survey of Canada (Atlantic), which acted as a partner with an industry group consisting of Marathon Canada, Norsk Hydro Canada, PanCanadian, and Murphy Oil. The survey is providing one component for use in hazard assessment within the lease block area of the central Scotian Slope, and forming an integral part of regional research carried out by the Geological Survey of Canada Atlantic (GSCA) funded by PERD and industry partners. The multibeam imagery is being used to derive a regional assessment of the character of seabed morphology, erosion, and the distribution of slope instabilities throughout the Scotian Slope. Spatial resolution is higher than in 3-D seismic data, especially on the mid to upper Slope, and the 17,000 km2 survey area provides regional coverage. Many of the large features (canyons and slope instabilities) on the Scotian Slope extend for many kilometers, and therefore their interpretation requires regional information. In particular, the multibeam imagery allows precise targeting of seabed features for subsequent higher resolution surveys of small critical areas and seabed sampling. Side scan sonar, sub-bottom profiling, and ROV surveys can provide fine detail of critical features. Precisely located samples can be used to obtain measurements of sediment properties, age dating of sediments, and benthic biota. A 30-day sampling cruise was performed by GSCA on the CCGS "Hudson", which
acquired high-resolution seismic profiles and piston and box cores in targeted features. The targeted data will be used to ground truth
the multibeam imagery and to assess geologic conditions and hazards of the Scotian Slope. The bathymetry data are being evaluated with new technology developed by the University of New Brunswick, Canada, which interactively integrates them into one common graphical environment and allows for precise identification of geologic correlations.