GEOSCAN, résultats de la recherche


TitreProgress towards understanding petroleum potential of the Lancaster Sound region, northern Nunavut
AuteurBrent, T A; Oakey, G N; Harrison, J C
SourceThe history of convergent and passive margins in the polar realm: sedimentary and tectonic processes, transitions and resources, proceedings of Quebec 2006, ILP Task Force on Sedimentary Basins; 2006 p. 15
LiensOnline - En ligne (page 15)
Séries alt.Secteur des sciences de la Terre, Contribution externe 20060460
ÉditeurInternational Lithosphere Program |a Quebec City, QC, Canada (Quebec City, QC, Canada)
RéunionQuebec 2006, ILP Task Force on Sedimentary Basins - The history of convergent and passive margins in the polar realm: sedimentary and tectonic processes, transitions and resources; Quebec City, QC; CA; Septembre 18-22, 2006
Mediaen ligne; numérique
ProvinceNunavut; Région extracotière du nord
SujetsPaléogène; Eocene; Paléocène; interprétations géophysiques; interpretations sismiques; profils sismiques marins; milieux marins; antécédents géologiques; antécédents tectoniques; cadre tectonique; éléments tectoniques; marges continentales; marges plaques; crevasses; aulacogènes; bassins; evolution du bassin; déformation; études de la croûte; analyses structurales; caractéristiques structurales; failles transformantes; fosses d'effondrement; capacité de production d'hydrocarbures; ressources pétrolières; prospection sismique; Bassin de Lancaster ; géophysique; géologie marine; tectonique; combustibles fossiles; Phanérozoïque; Cénozoïque; Tertiaire; Mésozoïque; Crétacé
ProgrammeLa mise en valeur des ressources du Nord
Résumé(disponible en anglais seulement)
Industry interpretation of marine seismic exploration between 1971 and 1979 identified numerous structural culminations in the mouth of Lancaster Sound and in areas offshore east of Devon and northern Bylot islands; an area greater than 120,000 km2 including 32 mapped closures totaling 2320 km2. At least seven seismic stratigraphic units are recognized in the absence of well control. New evidence for the geometry and age of the oceanic rift system in northern Baffin Bay is provided by recently published analyses of marine magnetic and gravity data in the region. These new constraints have been useful for a revised interpretation of seismic sequence boundaries and associated deformation.
A new database has been compiled comprising all identifiable legacy industry seismic profiles. This poster illustrates selected seismic transects chosen from this data set and interpreted in light of the new tectonic framework. Lancaster Basin is a mostly Eocene failed rift developed on attenuated continental crust; an arm of the late Paleocene-Eocene age oceanic rift system located within Baffin Bay. Phanerozoic basin development on the continental margin south of the Lancaster rift is exclusively late Cretaceous to early Paleocene in age. In contrast, Eocene compressive deformation, superimposed on a Cretaceous-Paleocene system of rift-transform continental margin basins, is widespread to the north; a consequence of north westerly-directed convergence of the Greenland plate.
This study, incorporating multi-disciplinary geophysical datasets, illustrates our latest synthesis of basin evolution, and crustal dynamics with implications for petroleum potential.