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TitleCretaceous strata on the Baffin Island Shelf
AuthorMacLean, B; Williams, G; Zhang, S
Source3P Arctic, the polar petroleum potential conference & exhibition, abstracts; by American Association of Petroleum Geologists; 2011.
Alt SeriesEarth Sciences Sector, Contribution Series 20100457
Meeting3P Arctic, the polar petroleum potential conference & exhibition; Halifax; CA; August 30 - September 2, 2011
Mediaon-line; digital
ProvinceNorthern offshore region
NTS16D; 16E; 16F; 16K; 16M; 16N; 26A; 26G; 26H; 26J; 27A; 27D; 27E; 27F; 27G; 37H
AreaBaffin Shelf; Davis Strait; Home Bay; Buchan Gulf; Cumberland Sound; Scott Inlet
Lat/Long WENS -76.0000 -60.0000 72.0000 64.0000
Subjectsstratigraphy; bedrock geology; seismic surveys, marine; boreholes; lithology; geophysical surveys; geophysical interpretations; limestones; gneisses; volcanic rocks; Albian; Cenomanian; Upper Cretaceous; palynostratigraphy; mudstones; shales; Coniacian; Campanian; diapirs; Cretaceous
ProgramMarine Geoscience for Arctic Economic Development, Offshore Geoscience
LinksOnline - En ligne
AbstractExtensive investigations of the surface and near surface bedrock of the Baffin Island continental shelf have been conducted by The Geological Survey of Canada using shallow and high resolution seismic systems and by borehole drilling using an underwater electric drill with 10 m seabed penetration capability. Early studies revealed the presence of rocks that included Precambrian gneisses and Ordovician limestones on the Southeast Baffin Shelf and volcanics in mid-Davis Strait, but most important from a regional petroleum perspective, Cretaceous (Aptian - Cenomanian) organic rich mudstones, siltstones and black shales were found to occur in Cumberland Sound, and Upper Cretaceous mudstones on the Northeast Baffin Shelf. New palynological studies, based on more sophisticated sample processing and comparison of assemblages with those from Bylot Island sections and from Greenland wells, now give us more precise age control on these samples.The cores of Upper Cretaceous mudstones from Home Bay and Buchan Gulf and from Upper Cretaceous black shale at the oil seep locality offshore Scott Inlet range in age from Coniacion to Campanian. The presence of these strata at these widely separated localities is indicative of their widespread occurrence in the subsurface of the Northeast Baffin Shelf. A single sample of Albian suggests that Cretaceous strata may be involved in north-northeastward trending diaper ridge structures on the SE Baffin Shelf seaward from Cumberland Sound. Geophysical data suggest these structures were formed by intrusion of volcanic material at depth during rifting in late Jurassic - early Cretaceous time. We are now integrating results of the new biostratigraphic data with the results of 2010 maturation studies of samples from the cores.