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TitreAppalachian foreland basin of Canada
AuteurLavoie, D
SourceSedimentary basins of the United States and Canada; par Miall, A D (éd.); Sedimentary basins of the world vol. 5, 2008 p. 65-103, https://doi.org/10.1016/S1874-5997(08)00003-8
Année2008
Séries alt.Commission géologique du Canada, Contributions aux publications extérieures 2002032
ÉditeurElsevier
Documentpublication en série
Lang.anglais
DOIhttps://doi.org/10.1016/S1874-5997(08)00003-8
Mediapapier; en ligne; numérique
Formatshtml; pdf (Adobe® Reader®)
ProvinceNouveau-Brunswick; Québec; Terre-Neuve-et-Labrador
Sujetsgéologie du substratum rocheux; zones tectonostratigraphiques; éléments tectoniques; évolution tectonique; stades tectoniques; marges continentales; marges plaques; décrochement horizontal; orogénies; déformation; affaissement; bassins; evolution du bassin; antecedents de sedimentation; sedimentation; milieux sédimentaires; niveaux paléomers; changements du niveau de la mer; trangressions; régressions; caractéristiques structurales; failles; plis; anticlinaux; synclinaux; paléogéographie; corrélations stratigraphiques; ressources pétrolières; capacité de production d'hydrocarbures; flysch; roches sédimentaires; conglomérats; grès; mudstones; calcarénites; calcaires; schistes; roches clastiques; dolomies; olistostromes; turbidites; biseaux sédimentaires; discordances; Province Appalachienne; Laurentie; Ceinture de Gaspe ; Ligne de Baie Verte-Brompton ; Front structural Appalachien; Graben de Saguenay ; Groupe d'Oak Hill ; Ceinture de Clam Bank ; Ligne de Logan's ; Orogenèse Taconienne; Orogenèse de Salinic ; Orogenèse Acadienne; Orogenèse Neoacadienne; Orogenèse Alleghanienne; Zone d'Humber ; Zone de Dunnage ; Graben d'Ottawa-Bonnechere ; Promontoire du Saint-Laurent; Platform du Saint Laurent; Faille de Chevauchement de Round Head ; Champ de pétrole de Garden Hill ; Faille de Chevauchement de Red Island ; Faille de Chevauchement de St. George ; Faille de Chevauchement de Tea Cove ; Discordance de Salinic; Synclinorium de Chaleurs Bay ; Anticlinorium d'Aroostook-Perce ; Synclinorium de Connecticut Valley-Gaspe ; Groupe de Chaleurs ; Groupe d'Honorat ; Groupe de Matapedia ; Groupe de St Francis ; Formation de Frontenac ; Groupe de Port Au Port ; Groupe de Cow Head ; Groupe de Northern Head ; Groupe de Potsdam ; Groupe de Philipsburg ; Groupe de Beekmantown ; Groupe de St. George ; tectonique; géologie structurale; stratigraphie; combustibles fossiles; Phanérozoïque; Paléozoïque; Dévonien; Silurien; Ordovicien; Cambrien; Précambrien; Protérozoïque
Illustrationsgeochronological charts; sketch maps; stratigraphic charts; stratigraphic columns; stratigraphic correlations; seismic sections; cross-sections
Résumé(disponible en anglais seulement)
The Late Proterozoic breakup of Rodinia led to the formation of Laurentia. The continent had a paleosouthern jagged margin that consisted of recesses and salients; the Canadian segment of that margin belongs to the St. Lawrence Promontory and Quebec Reentrant.
The stratigraphic framework and paleogeographic evolution of Cambrian-Ordovician shallow- to deep-marine units deposited during the rift, passive-margin and foreland-basin stages are integrated from western Newfoundland to southern Quebec. Major sea-level lowstands and highstands are correlated, with some time discrepancy starting to occur in earliest Ordovician. The passive-margin evolution was primarily controlled by eustatic sea-level changes; although some ancestral faults were sporadically active in Late Cambrian to Early Ordovician in the Quebec Reentrant. The diachronous westerly directed late Early to Late Ordovician tectonic-controlled extensional collapse of the shallow-marine foreland shelf from the St. Lawrence Promontory to the Quebec Reentrant was followed by the diachronous collision of volcanic arcs along Laurentia (Taconian Orogeny) which climaxed in the Middle-Late Ordovician interval with collision occurring first at the St. Lawrence Promontory.
Tectonic quiescence was short-lived along the paleosouthern continental margin of Laurentia as more exotic microcontinents (Ganderia, Avalonia) were closing in. The paleoenvironmental history was significantly affected by these Early Silurian to late Early Devonian tectonic events (Salinic and Acadian orogenies). A Late Ordovician to Early Silurian filling stage was followed by two T-R cycles. The first of these cycles was initiated by a tectonically controlled sea-level rise in latest Early Silurian followed by a eustatic sea-level fall in Late Silurian. The cycle culminated in the Salinic unconformity. The second cycle started with a major tectonic collapse in latest Silurian followed by a slow to ultimately rapid sea-level fall from the Early to early Middle Devonian. The cycle ended with sub-aerial exposure and syn-tectonic
sedimentation (Acadian Orogeny).
GEOSCAN ID213458