Submarine landslides in Arctic sedimentation: Canada Basin

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Abstract

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.

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Additional publication details

Publication type Book chapter
Publication Subtype Book Chapter
Title Submarine landslides in Arctic sedimentation: Canada Basin
DOI 10.1007/978-94-007-2162-3_13
Volume 31
Year Published 2016
Language English
Publisher Springer
Publisher location Amsterdam, Netherlands
Contributing office(s) Woods Hole Coastal and Marine Science Center
Description 11 p.
Larger Work Type Book
Larger Work Subtype Conference publication
Larger Work Title Submarine mass movements and their consequences
First page 147
Last page 157
Country Canada, United States
State Alaska
Other Geospatial Canada Basin of the Arctic Ocean