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TitleGeological framework, basin evolution, hydrocarbon system data and conceptual hydrocarbon plays for the Hudson Bay and Foxe basins, Canadian Arctic
LicencePlease note the adoption of the Open Government Licence - Canada supersedes any previous licences.
AuthorLavoie, DORCID logo; Pinet, N; Dietrich, J; Zhang, S; Hu, KORCID logo; Asselin, E; Chen, ZORCID logo; Bertrand, R; Galloway, JORCID logo; Decker, V; Budkewitsch, P; Armstrong, D; Nicolas, M; Reyes, JORCID logo; Kohn, B P; Duchesne, M JORCID logo; Brake, V; Keating, P; Craven, J; Roberts, B
SourceGeological Survey of Canada, Open File 7363, 2013, 210 pages, Open Access logo Open Access
PublisherNatural Resources Canada
Documentopen file
Mediaon-line; digital
File formatpdf
ProvinceManitoba; Ontario; Northern offshore region; Nunavut
NTS32L; 32M; 32N; 33D; 33E; 33L; 43B; 43G; 43H; 54K; 54L; 45; 46
AreaHudson Bay; Southampton Island; Churchill; Moose River
Lat/Long WENS -96.0000 -68.0000 71.0000 50.0000
Subjectsfossil fuels; stratigraphy; structural geology; tectonics; sedimentary basins; basin analysis; basin evolution; sedimentary rocks; dolostones; dolomites; petrography; hydrocarbons; hydrocarbon potential; pockmarks; gas wells; bathymetry; structural analyses; structural features; tectonic environments; tectonic interpretations; tectonic setting; lithostratigraphy; Hudson Platform; Moose River Basin; Foxe Basin; Hudson Bay Basin; Hudson Strait Basin; Paleozoic; Devonian; Silurian; Ordovician
Illustrationslocation maps; stratigraphic columns; schematic diagrams; profiles
ProgramGEM: Geo-mapping for Energy and Minerals Hudson / Foxe Bay Sedimentary Basins
Released2013 11 08
The Hudson Bay Platform covers ~820,000 km2 and is the largest intracratonic basin in North America. The succession of the Hudson Platform consists mainly of Paleozoic strata, with a maximum preserved thickness of about 2500 m. The Paleozoic succession includes Ordovician to Devonian shallow marine carbonates, reefs and shales with locally thick Devonian evaporites. Paleozoic strata are unconformably overlain by erosional remnants of Jurassic, Cretaceous and mid-Cenozoic non-marine and marine strata. In a first phase of
exploration (1973-1985), over 46,000 line-km of seismic reflection data were acquired and 5 offshore exploration wells drilled. Most of the seismic profiles and all of the exploration wells are located in a relatively small area in the central part of Hudson Bay.
Re-evaluation of the available seismic data indicates that syn-tectonic sedimentation occurred in Late Ordovician(?), Silurian and Early Devonian with significant depocentre migration with time. New biostratigraphic data, supported by the seismic evidence, indicate 3 major unconformities, with the most important ones at the Silurian-Devonian boundary and at the top of the Upper Devonian section.
New organic matter reflectance data (Rovit of 0.60 to 0.91%) indicate oil window conditions for the Ordovician – Silurian interval in parts of the Hudson Platform. Apatite fission track data indicate that analysed samples experienced significant annealing at
temperatures > 60°C.
Available hydrocarbon system data are synthesized in 5 conventional petroleum plays, including recently recognized porous hydrothermal dolomites and reefs. Type I/II-S Upper Ordovician oil shales are recognized at several locations in the basin with TOC values up to 35% and thickness up to 15 metres. Lower Silurian shales may also have local hydrocarbon generation potential (TOC values up to 2%). New high-resolution bathymetric surveys in Hudson Bay led to the recognition of circular sea-floor depressions similar to fluid-escape pockmarks and preliminary interpretations of RADARSAT images suggest possible oil slicks at sea surface. Some direct hydrocarbon indicators are interpreted from the vintage seismic information. Taken together, these new hydrocarbon systems data suggest that large areas of the Hudson Platform are prospective for oil accumulations.
Summary(Plain Language Summary, not published)
This Open File report presents the research results for the Hudson Bay / Foxe basins GEM-Energy project. The report presents our current understanding on basin formation and evolution, presents an updated stratigraphic framework for the entire areas for the first time. Most of the report is devoted to new hydrocarbon system data that were either reinterpreted or acquired during this project. Hydrocarbons source rocks are recognized in the offshore and onshore and new source rocks intervals have been identified. New thermal maturation data and geothermochronology suggests that the Ordovician source rocks generated oil. Fluid escape features (pockmarks) have been identified on the seafloor and analyses of RADARSAT images located 46 suspected natural oil slicks at water surface. New potential hydrocarbon reservoirs are recognized in field and well logs. Re-evaluation of the vintage seismic data led to the proposition of 6 conceptual conventional and 2 unconventional hydrocarbon plays. The integration of all the dataset suggest that the Hudson Bay Basin in prospective for oil

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