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TitleSeabed hydrocarbon venting features in Baffin Bay
AuthorBennett, R; Campbell, D C; Hughes-Clarke, J
SourceArcticNet (ASM2013), programme; 2013 p. 123-124
Year2013
Alt SeriesEarth Sciences Sector, Contribution Series 20130332
PublisherArcticNet
MeetingArcticNet Annual Science Meeting; Halifax, NS; CA; December 10-13, 2013
Documentbook
Lang.English
Mediapaper; on-line; digital
File formatpdf
ProvinceOffshore region
NTS27A; 27D; 27E; 27G; 27H; 28; 38A; 38D; 38E; 38F; 38G; 38H
AreaBaffin Bay; Lancaster Sound
Lat/Long WENS -88.0000 -55.0000 78.0000 68.0000
Subjectsmarine geology; geophysics; hydrocarbons; echo sounding; geophysical surveys; pockmarks; bathymetry
ProgramMarine Geohazards, Public Safety Geoscience
LinksOnline - En ligne (Programme, PDF 3.08 MB)
AbstractMultibeam echosounder data were used to map the distribution of seabed gas vents (pockmarks) in Baffin Bay and Lancaster Sound. The data were collected by the Ocean Mapping Group at the University of New Brunswick (OMG-UNB) during ArcticNet and CASES expeditions onboard CCGS Amundsen from 2003 to 2011. Using the multibeam data set gridded at 25 m horizontal resolution, circular depressions on the seabed interpreted to be pockmarks caused by venting hydrocarbons are observed in the study area. The pockmarks are mostly clustered at Buchan Trough, Scott Trough, Broughton Trough and near Cape Dyer. Sixty-three features interpreted as pockmarks are observed in the multibeam bathymetry data available in Baffin Bay and Lancaster Sound. The pockmarks identified from these data are up to 900 m wide and 26 m deep.
Summary(Plain Language Summary, not published)
Multibeam echosounder data were used to map the distribution of seabed gas vents (pockmarks) in Baffin Bay. The pockmarks are mostly clustered at Buchan Trough, Scott Trough, Broughton Trough and near Cape Dyer. Sixty-three features interpreted as pockmarks are observed in the multibeam bathymetry data available in Baffin Bay and Lancaster Sound. The pockmarks identified from these data are up to 900 m wide and 26 m deep. The clusters of pockmarks at Buchan and Scott Troughs are located at the southern edge of the Baffin Fan and in the Scott Inlet Basin. Both the Baffin Fan and the Scott Inlet Basin are thought to contain hydrocarbons. Existing studies using satellite imagery have interpreted potential sea surface hydrocarbon slicks in Baffin Bay at the same approximate area.
GEOSCAN ID293338