A belt of seabed erosion along the Beaufort Sea margin, offshore Northwest Territories, governed by Holocene evolution of the Beaufort Shelf-Break Jet: M183-2/8198E-PDF

geological evidence, current measurements, and initial oceanographic modelling /

"Removal of several metres thickness of stratified muds is recognized from penetration echosounder data along a narrow belt, 1-8km wide along the Beaufort Sea shelf break (100-200m water depth). A corresponding zone of non-deposition (bypass) is bound by blankets of mud thickening away from the erosion/non-deposition belt. Long-term oceanographic moorings have previously demonstrated periodic currents capable of mud re-suspension near the shelf break. Seabed instrumented measurement of the current and its effects on the mud behavior are pending. Radiocarbon dating indicates the erosion began about 6000 years ago. A combination of geologic, oceanographic current data and 3-D oceanographic modelling approaches converge to indicate a strong birth/acceleration of the current at that time, presently recognized as the Beaufort Shelf-break Jet (BSJ). The study also helps constrain sediment structural disturbance rates from seabed fluid/gas seeps in the area”--Summary provided by publisher.

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Department/Agency Natural Resources Canada.
Title A belt of seabed erosion along the Beaufort Sea margin, offshore Northwest Territories, governed by Holocene evolution of the Beaufort Shelf-Break Jet
Subtitle geological evidence, current measurements, and initial oceanographic modelling /
Series Title Geological Survey of Canada, open file ;
Publication Type Series - View Master Record
Language [English]
Format Electronic
Electronic Document

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Note Caption title.
Date 2017.
Number of Pages 1 p. :
Catalogue Number
  • M183-2/8198E-PDF
Departmental Catalogue Number 299691
Subject Terms Ocean floor, Erosion, Geomorphology, Oceanography, Surficial geology