| Title | Shallow seismic reflection mapping of the Mackenzie Trough, Beaufort Sea, offshore Yukon and Northwest Territories |
| Download | Downloads |
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| Licence | Please note the adoption of the Open Government Licence - Canada
supersedes any previous licences. |
| Author | Duchesne, M J ;
Brake, V I; Claprood, M; Vosoughi, E; Huot-Vézina, G; Kang, S
G; Jang, U; Jin, Y K; King, E L; Côté, M M; Dallimore, S R |
| Source | Geological Survey of Canada, Open File 8657, 2020, 19 pages, https://doi.org/10.4095/321488  Open Access |
| Image |  |
| Year | 2020 |
| Publisher | Natural Resources Canada |
| Document | open file |
| Lang. | English |
| Media | on-line; digital |
| File format | pdf |
| Province | Northern offshore region; Yukon; Northwest Territories |
| NTS | 117D/09; 117D/10; 117D/11; 117D/13; 117D/14; 117D/15; 117D/16; 117E/01; 117E/02; 117E/03; 117E/04; 117E/05; 117E/06; 117E/07; 117E/08; 117E/10; 117E/11; 117E/12; 117F/01; 117F/08; 117F/09 |
| Area | Beaufort Sea |
| Lat/Long WENS | -140.5000 -136.0000 70.7500 69.5000 |
| Subjects | marine geology; geophysics; surficial geology/geomorphology; stratigraphy; Science and Technology; Nature and Environment; submarine features; submarine troughs; geophysical surveys; seismic surveys,
marine; seismic reflection surveys; seismic interpretations; seismic data; seismic velocities; seismic waves; geophysical logging; continental margins; continental shelf; continental slope; marine sediments; isopachs; geological history; erosion;
depositional history; glacial history; glaciation; deglaciation; bathymetry; bedrock topography; seafloor topography; exploration wells; oil wells; gas wells; stratigraphic analyses; permafrost; Holocene; Pleistocene; Neogene; Pliocene; Mackenzie
Trough; Beaufort-Mackenzie Basin; Adlartok P-09 Well; Methodology; glaciomarine sediments; Phanerozoic; Cenozoic; Quaternary; Tertiary |
| Illustrations | location maps; seismic profiles; geoscientific sketch maps |
| Program | Environmental
Geoscience Program Management |
| Released | 2020 01 27 |
| Abstract | The Mackenzie Trough is a unique geological feature of the Canadian Beaufort Sea connecting the Mackenzie River Delta to the continental slope. This study utilizes geoscientific interpretation methods
applied to seismic reflection data acquired on the Beaufort Shelf between 2006 and 2017 to map four seismic markers observed within the shallow subsurface of the Mackenzie Trough; i.e. the base of the Mackenzie Trough and three other seismic markers
located between the latter and the seafloor. Seismic interpretation has produced four time-structure maps and five time-isopach maps that contribute to the existing geological framework in this sector of the Beaufort Sea. The results suggest that the
actual morphology of the Mackenzie Trough is inherited from its base. During the Quaternary, terrigenous sediment supply related to glacier advance and retreat gradually and partially filled the trough. Thicker Quaternary deposits are found within a
broad U-shaped erosional cut located in the center of the Mackenzie Trough. Time-isopach maps reveal that zones of thicker sediment accumulations have shifted during the Quaternary, moving landward between the Pliocene and the Holocene. |
| Summary | (Plain Language Summary, not published)
The Mackenzie Trough is a unique geological feature of the Canadian Beaufort Sea connecting the Mackenzie River Delta to the continental slope. This
study utilizes geoscientific interpretation methods applied to seismic reflection data to map four seismic markers observed within the shallow subsurface of the Mackenzie Trough.Seismic interpretation has produced four time-structure maps and five
time-isopach maps that contribute to the existing geological framework in this sector of the Beaufort Sea. This report addresses seismic reflection mapping of four horizons that are observed within the shallow subsurface of the Mackenzie Trough. It
provides insights on the geology of this area of the Beaufort Sea and a basis to better understand the occurrence and distribution of subsea permafrost and the potential for marine geohazards. The research forms part of the Public Safety Geoscience
and Environmental Geoscience programs within the Geological Survey of Canada. |
| GEOSCAN ID | 321488 |
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