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TitreThe Palaeoproterozoic Trans-Hudson Orogen: a prototype of modern accretionary processes
AuteurCorrigan, D; Pehrsson, S; Wodicka, N; de Kemp, E
SourceAncient orogens and modern analogues; par Murphy, J B (éd.); Keppie, J D (éd.); Hynes, A J (éd.); Geological Society, Special Publication vol. 327, 2009 p. 457-479, https://doi.org/10.1144/SP327.19
Année2009
Séries alt.Secteur des sciences de la Terre, Contribution externe 20090130
ÉditeurGeological Society of London
Documentpublication en série
Lang.anglais
DOIhttps://doi.org/10.1144/SP327.19
Mediapapier; numérique; en ligne
Formatspdf
ProvinceAlberta; Saskatchewan; Manitoba; Nunavut; Québec; Ontario
SNRC23; 24; 25; 26; 27; 36; 44; 45; 46; 53; 54; 55; 56; 64; 65
Lat/Long OENS-104.0000 -46.0000 71.0000 54.0000
Sujetsaccretion; éléments tectoniques; milieux tectoniques; interprétations tectoniques; orogénies; régions orogéniques; orogenèse; évolution tectonique; Orogène de Trans-hudson ; Province de Superior ; Zone de Reindeer ; Province de Churchill ; Complexe de Flin Flon - Glennie ; Domaine de La Ronge ; Domaine de Lynn Lake ; Orogenèse de Foxe ; Orogenèse de Reindeer ; Batholite de Wathaman-chipewyan ; Batholite de Cumerland ; Orogène de Snowbird ; Arc de Narsajuaq ; Batholite de De Pas ; tectonique; Protérozoïque
Illustrationstectonic models
ProgrammeGEM : La géocartographie de l'énergie et des minéraux - la composante GEM minéraux, GEM : La géocartographie de l'énergie et des minéraux
Résumé(disponible en anglais seulement)
The Trans-Hudson Orogen (THO) of North America is one of the earliest orogens in Earth's history that evolved through a complete Wilson Cycle. It represents c. 150 Ma of opening of the Manikewan Ocean, from c. 2.07--1.92 Ga, followed by its demise in the interval 1.92--1.80 Ga, during the final phase of growth of the Supercontinent Columbia (Nuna). It is characterized by three lithotectonic divisions: (i) Churchill margin (or peri-Churchill); (ii) Reindeer Zone; and (iii) Superior margin (or peri-Superior). The peri-Churchill realm records progressive outward continental growth by accretion of Archaean to Palaeoproterozoic micro-continents (Hearne, Meta Incognita/Core Zone, Sugluk) and eventually arc terranes (La Ronge--Lynn Lake) to the Slave-Rae nuclei, with attendant development of orogenies and basin inversions related to the specific accretion events (1.92--1.89 Ga Snowbird; 1.88--1.865 Ga Foxe; 1.87--1.865 Ga Reindeer orogenies). The Reindeer Zone is characterized by primitive to evolved oceanic arcs, back-arc basins, oceanic crust and ocean plateaus that formed during closure of the Manikewan Ocean, and accretion of a micro-continent (Sask Craton) and smaller Archaean crustal fragments. The terminal phase of the Trans--Hudson orogeny represents collision between the Superior craton, the Reindeer Zone and the composite western Churchill Province during the interval 1.83--1.80 Ga.
GEOSCAN ID247671