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TitreThe record of Ordovician arc-arc and arc-continent collisions in the Canadian Appalachians during the closure of Iapetus
AuteurZagorevski, A; van Staal, C R
SourceFrontiers in earth science; 2011 p. 341-371, https://doi.org/10.1007/978-3-540-88558-0 12
Année2011
Séries alt.Secteur des sciences de la Terre, Contribution externe 20100258
ÉditeurSpringer Berlin Heidelberg
Documentlivre
Lang.anglais
DOIhttps://doi.org/10.1007/978-3-540-88558-0 12
Mediapapier; en ligne; numérique
Formatspdf
ProvinceQuébec; Nouvelle-Écosse; Terre-Neuve-et-Labrador; Île-du-Prince-Édouard; Nouveau-Brunswick
SNRC1; 2; 11; 12A; 12B; 12G; 12H; 12I; 12P; 21; 22A; 22B; 22C; 22G; 22H
Lat/Long OENS-72.0000 -52.0000 52.0000 45.0000
Sujetsarcs magmatiques; marges continentales; marges continentales, atlantique; subduction; zones de subduction; accretion; interprétations tectoniques; évolution tectonique; sedimentation; Arc de Notre Dame ; tectonique
Illustrationslocation maps; photographs; cross-sections
ProgrammeAppalaches IGC-3, Initiative géoscientifique ciblée (IGC-3), 2005-2010
Diffusé2011 04 20
Résumé(disponible en anglais seulement)
The Northern Appalachian orogen records complex Late Cambrian to Late Silurian closure of the Iapetus Ocean, which led to significant outboard growth of the Laurentian margin over time. The outboard growth during the Ordovician was primarily achieved by progressive accretion of peri-Laurentian and peri-Gondwanan arc, rifted arc and supra-subduction zone ophiolite terranes. The most important Ordovician accretionary episodes involved three successive arc–continent collisions: the Early-Middle Ordovician Laurentian Humber margin – Notre Dame Arc, Middle Ordovician composite Laurentian margin – Annieopsquotch accretionary tract, and Middle Ordovician composite Laurentian margin – peri-Gondwanan Victoria Arc collisions. The three collisions exhibited different tectonic configurations that were akin to Taiwan, Izu, and Molucca Sea collision zones respectively. These configurations exhibit different tectonic setting of the arc with respect to the collision zone and result in significant differences in style of deformation, metamorphism, preservation of arc and ophiolite terranes, and syn- to post-collisional stratigraphic record.
GEOSCAN ID287116