| Titre | Submarine landslides in Arctic sedimentation: Canada Basin |
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| Auteur | Mosher, D C ;
Shimeld, J; Hutchinson, D; Lebedeva-Ivanova, N; Chapman, C B |
| Source | Submarine 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. 147-157, https://doi.org/10.1007/978-94-007-2162-3 13 |
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| Année | 2012 |
| Séries alt. | Secteur des sciences de la Terre, Contribution externe 20110180 |
| Éditeur | Springer Netherlands |
| Document | publication en série |
| Lang. | anglais |
| DOI | https://doi.org/10.1007/978-94-007-2162-3 13 |
| Media | papier; en ligne; numérique |
| Formats | pdf |
| Province | Région extracotière du nord |
| Région | Canada Basin |
| Lat/Long OENS | -148.0000 -128.0000 78.0000 70.0000 |
| Sujets | transport sous-marin; caractéristiques sous-marines; sédiments marins; sédiments marins; transport des sediments; glissements de terrain; glissements de pentes; stabilité des pentes; tsunami; levés de
reflexion sismiques; géologie marine; géophysique |
| Illustrations | cartes de localisation; profils |
| Programme | Délimitation du plateau continental du Canada en vertu de la Convention des Nations Unies sur le droit de la mer (UNCLOS) |
| Diffusé | 2011 09 15 |
| Résumé | (disponible en anglais seulement)
Canada Basin of the Arctic Ocean is the least studied ocean basin in the World. Marine seismic field programs were conducted over the past 6 years using
Canadian and American icebreakers. These expeditions acquired more than 14,000 line-km of multibeam bathymetric and multi-channel seismic reflection data over abyssal plain, continental rise and slope regions of Canada Basin; areas where little or no
seismic reflection data existed previously. Canada Basin is a turbidite-filled basin with flat-lying reflections correlateable over 100s of km. For the upper half of the sedimentary succession, evidence of sedimentary processes other than turbidity
current deposition is rare. The Canadian Archipelago and Beaufort Sea margins host stacked mass transport deposits from which many of these turbidites appear to derive. The stratigraphic succession of the MacKenzie River fan is dominated by mass
transport deposits; one such complex is in excess of 132,000 km2 in area and underlies much of the southern abyssal plain. The modern seafloor is also scarred with escarpments and mass failure deposits; evidence that submarine landsliding is an
ongoing process. In its latest phase of development, Canada Basin is geomorphologically confined with stable oceanographic structure, resulting in restricted depositional/reworking processes. The sedimentary record, therefore, underscores the
significance of mass-transport processes in providing sediments to oceanic abyssal plains as few other basins are able to do. |
| GEOSCAN ID | 289219 |
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