GEOSCAN, résultats de la recherche


TitreInitial rifting and break-up between Nova Scotia and Morocco: An examination of new geophysical data and models
AuteurDehler, S A
SourceProceedings of the II Central and North Atlantic Conjugate Margins conference; vol. VIII, 2010 p. 79-82
LiensOnline - En ligne (PDF, 2.6MB)
Séries alt.Secteur des sciences de la Terre, Contribution externe 20100073
RéunionII Central and North Atlantic Conjugate Margins conference; Lisbon; PT; Septembre 29 - Octobre1, 2010
Mediapapier; en ligne; numérique
ProvinceRégion extracotière de l'est; Nouveau-Brunswick; Nouvelle-Écosse; Île-du-Prince-Édouard
SNRC10; 11; 20A; 20B; 20G; 20H; 20I; 20J; 20O; 20P; 21A; 21B; 21G; 21H; 21I; 21J; 21O; 21P
Lat/Long OENS-68.0000 -56.0000 48.0000 40.0000
Sujetsdécrochement horizontal; crevasses; dérive des continents; interprétations tectoniques; modèles tectoniques; antécédents tectoniques; interprétations géophysiques; tectonique; géophysique
Illustrationslocation maps; profiles
ProgrammeGéoscience en mer, Analyse de bassin et ressources géoscientifiques
Résumé(disponible en anglais seulement)
The continental margins off Nova Scotia and Morocco formed during the early Mesozoic separation of Africa from North America. The Nova Scotia margin is today characterized by a thick sedimentary basin overlying continental crust that thinned from 40 km original thickness to less than 5 km in places. The southern part of the margin is identified as volcanic, consistent with the US Atlantic margin, whereas the central and northern margins are interpreted as nonvolcanic. The nature of the transition from volcanic to non-volcanic, and its recognition in various geophysical data sets on both sides of the Atlantic, have been the subject of numerous studies in previous years. This study focuses on the magnetic anomalies associated with the conjugate margins to establish the presence and extent of rift-related volcanism along the margin and explore other possible sources of the ECMA and their links to variations in rifting character along the margins.