00000nam 2200000za 4500 9.820030 CaOODSP 20230131161136 cr ||||||||||| 161103s2016 oncabd ob f000 0 eng d 978-0-6-600-5732-3 CaOODSP eng eng fre n-cn-yk M44-2016/3E-PDF First results on velocity analyses of multichannel seismic data acquired with the icebreaker RV Araon across the southern Beaufort Sea, offshore Yukon [electronic resource] / M. Riedel ... [et al.]. [Ottawa] : Natural Resources Canada, 2016. 24 p. : col. charts, col. ill., col. maps. Current research, 1701-4387 ; 2016-3 Includes bibliographical references. "1,220 line km of multichannel seismic data were acquired in the Canadian Beaufort Sea during a 2014 research cruise in collaboration with the Korea Polar Research Institute. Seismic lines were acquired to map the shallow sedimentary structures. Seismic velocity analyses suggest a consistent regional velocity-depth trend on the slope, east of the Mackenzie Trough, with deviations noted at an upper erosional unconformity associated with mega-scale glacial lineations and at the base of the Shallow Bay Formation. Data acquired in the Mackenzie Trough region suggest a different velocity-depth trend, with the region being marked by a large erosional unconformity. Velocity analyses suggest a removal of up to 600 m of overburden. In deeper water, a bottom-simulating reflector is characterized by the presence of free gas and a low velocity zone. The data allowed analyses of fluid expulsion features and determine that the source of mud extruded on the seafloor was from depths of up to 3 km"--Provided by publisher. Includes abstract in French. gccst Ocean floor gccst Geophysics gccst Seismology Riedel, Michael. Canada. Natural Resources Canada. Geological Survey of Canada. Current research (Geological Survey of Canada) 1701-4387 ; 2016-3. (CaOODSP)9.506236 PDF 6.82 MB https://publications.gc.ca/collections/collection_2016/rncan-nrcan/M44-2016-3-eng.pdf 298840