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TitleSub-bottom profiler survey
DownloadDownload (whole publication)
AuthorRiedel, M; Hong, J K; Conway, K; Shin, D S; Kim, S; Kim, H J; Choi, H K; Kim, Y -G; Seo, N; Ulmi, M; Kim, H S; Byun, E J; Lee, Y J
SourceOverview of field operations during a 2013 research expedition to the southern Beaufort Sea on the RV Araon; by Jin, Y K; Riedel, M; Hong, J K; Nam, S I; Jung, J Y; Ha, S Y; Lee, J Y; Kim, G Y; Yoo, J; Kim, H S; Kim, G; Conway, K; Standen, G; Ulmi, M; Schreker, M; Geological Survey of Canada, Open File 7754, 2015 p. 59-77, https://doi.org/10.4095/295967
Year2015
PublisherNatural Resources Canada
Documentopen file
Lang.English
Mediadigital; on-line
RelatedThis publication is contained in Jin, Y K; Riedel, M; Hong, J K; Nam, S I; Jung, J Y; Ha, S Y; Lee, J Y; Kim, G Y; Yoo, J; Kim, H S; Kim, G; Conway, K; Standen, G; Ulmi, M; Schreker, M; (2015). Overview of field operations during a 2013 research expedition to the southern Beaufort Sea on the RV Araon, Geological Survey of Canada, Open File 7754
File formatpdf
ProvinceNorthern offshore region
AreaBeaufort Sea; Beaufort Sea shelf; Beaufort Sea slope
Lat/Long WENS-141.0000 -133.0000 70.2500 68.0000
Subjectsgeophysics; fossil fuels; geophysical surveys; seismographs; seismological network; seismology; seismic waves; gas; acoustic surveys; acoustic surveys, marine; hydrate; permafrost; freezing ground; ground ice; bathymetry; continental shelf; continental slope; slope deposits
Illustrationslocation maps; profiles; tables
Viewing
Location
 
Natural Resources Canada Library - Ottawa (Earth Sciences)
 
ProgramMarine Geohazards, Public Safety Geoscience
Released2015 02 17
Abstract(Summary)
During Expedition ARA04C, more than 3000 line-kilometers of sub-bottom profiler (SBP) data were collected, co-located with multibeam and backscatter data. These data are an essential part of the study of sub-seafloor permafrost distribution and further provide insights into sediment dynamics at critical boundaries, especially the shelf edge. Here, the occurrence of pingo-like features (PLFs) result in a characteristic, rugged landscape with thousands of PLFs piercing through the otherwise laminated sediments. More than 30 crossings of this critical shelf-edge boundary were made during this expedition, with locations specifically chosen to complement data acquired in 2012 with the Huntec system and previous vintage 3.5 kHz data that were provided by ArcticNet as part of the regional multibeam map of the study area. Critical new insights were gained at deep-water fluid expulsion zone, not previously imaged in the detail achieved during Expedition ARA04C. Critical new data was also acquired over the area of the "Gary Knolls", where PLF structures occur at the shelf edge in water depth of only 50 to 60m. All SBP data from this expedition will be post-processed and analyzed for the presence of sub-seafloor permafrost, occurrence of the PLF structures and indications for fluid and gas migration.
GEOSCAN ID295967