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TitlePaleoenvironmental analyses and revised lithostratigraphic assignments for 28 wells of the Hopedale and Saglek basins, offshore eastern Canada
LicencePlease note the adoption of the Open Government Licence - Canada supersedes any previous licences.
AuthorDafoe, L TORCID logo
SourceGeological Survey of Canada, Open File 8810, 2021, 209 pages (28 sheets), Open Access logo Open Access
PublisherNatural Resources Canada
Documentopen file
Mediaon-line; digital
File formatreadme
File formatpdf; rtf
ProvinceNewfoundland and Labrador; Nunavut; Eastern offshore region; Northern offshore region
NTS3; 14; 15
AreaLabrador Sea; Davis Strait
Lat/Long WENS -64.0000 -44.0000 62.0000 53.0000
Subjectsmarine geology; stratigraphy; sedimentology; paleontology; Nature and Environment; Science and Technology; paleoenvironment; lithostratigraphy; biostratigraphy; continental margins; continental shelf; continental slope; exploration wells; sedimentary basins; basin evolution; tectonic history; rifting; sea floor spreading; depositional history; depositional environment; bedrock geology; lithology; sedimentary rocks; mudstones; shales; carbonates; igneous rocks; volcanic rocks; well logging; core descriptions; fossils; ichnology; ichnofossils; fossil assemblages; micropaleontology; microfossils; systematic stratigraphy; type sections; Labrador Margin; Baffin Shelf; Hopedale Basin; Saglek Basin; North American Plate; Greenland Plate; Saglek Formation; Mokami; Leif Member; Kenamu; Gudrid; Cartwright; Markland; Freydis Member; Bjarni Formation; Alexis Formation; Labrador Trough; Dinoflagellates; Phanerozoic; Cenozoic; Mesozoic; Cretaceous
Illustrationslocation maps; geoscientific sketch maps; stratigraphic charts; tables; stratigraphic sections; lithologic sections; well logs; profiles
ProgramGEM2: Geo-mapping for Energy and Minerals Baffin Region
Released2021 07 14
AbstractDuring the Early Cretaceous, rifting began between the paleo-North American and Greenland plates, eventually resulting in the development of the Labrador Sea, Davis Strait, and Baffin Bay regions. Along the western side of the Labrador Sea, the Labrador margin includes the Hopedale Basin and southern portion of the Saglek Basin. The Saglek Basin continues northwards into western Davis Strait, extending along the southeast Baffin Shelf. These depocentres record sedimentation from the Early Cretaceous syn-rift phase, late rift phase in the Late Cretaceous, drift phase or period of seafloor spreading in the latest Cretaceous to earliest Oligocene, and in the post-drift phase from the earliest Oligocene to Pleistocene. A total of 28 wells intersect the Mesozoic-Cenozoic section in these basins and document an important stratigraphic record for the region. Studies of these wells have included lithostratigraphic, biostratigraphic, and paleoenvironmental analyses, some with a regional or semi-regional undertaking. However, more recent studies have provided new understandings of the age and distribution of the eight formations that make up the stratigraphic succession along the margin. The present study focuses on incorporating existing well data to develop comprehensive and consistent paleoenvironmental interpretations for the wells of the Labrador margin and southeast Baffin Shelf. Lithological, well log, fossil content, and core descriptions are presented and interpreted to produce a regional understanding of paleoenvironmental change through time. In addition, lithostratigraphic boundaries and respective type and reference sections are modified to better fit lithological changes, well-log breaks, biostratigraphic hiatuses, and/or abrupt paleoenvironment changes. This revised paleoenvironmental and lithostratigraphic framework will help to serve future basin history studies in the region.
Summary(Plain Language Summary, not published)
The offshore wells along the Labrador Shelf are studied to develop a revised paleoenvironmental framework for the 28 wells that is consistent across the regional. A variety of datasets were used to develop descriptions of rock intervals, these are then interpreted in context of their paleoenvironmental affinity. In addition to this, changes to the framework of rock units is undertaken considering the work of this study, well log signatures, and new age constraints. This framework provides a basis for future studies of the stratigraphy along the Labrador Shelf.

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