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The Labrador Trough or the New Quebec Orogen is a 1,600 km (994 mi) long and 160 km (99 mi) wide geologic belt in Canada, extending south-southeast from Ungava Bay through Quebec and Labrador. The trough is a linear belt of sedimentary and volcanic rocks which developed in an Early Proterozoic rift basin. To the west is the Archean Superior Craton. To the east are the rocks of the Archean Rae Craton. The sedimentary rocks and volcanics of the Labrador Trough were intensely deformed and subjected to high grade metamorphism along with the Churchill terrain during the Trans-Hudson orogeny. It is a northeast extension of the Circum-Superior Belt and is terminated to the south by the Grenville Front Tectonic Zone.

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  • Orogène du Nouveau-Québec (fr)
  • Labrador Trough (en)
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  • The Labrador Trough or the New Quebec Orogen is a 1,600 km (994 mi) long and 160 km (99 mi) wide geologic belt in Canada, extending south-southeast from Ungava Bay through Quebec and Labrador. The trough is a linear belt of sedimentary and volcanic rocks which developed in an Early Proterozoic rift basin. To the west is the Archean Superior Craton. To the east are the rocks of the Archean Rae Craton. The sedimentary rocks and volcanics of the Labrador Trough were intensely deformed and subjected to high grade metamorphism along with the Churchill terrain during the Trans-Hudson orogeny. It is a northeast extension of the Circum-Superior Belt and is terminated to the south by the Grenville Front Tectonic Zone. (en)
  • L'orogène du Nouveau-Québec, aussi connu sous le nom fosse du Labrador est une bande étroite de roches sédimentaires et ignées large de 160 km et longue de 1 200 km qui traverse le nord du Québec (Canada) du lac Manicouagan au détroit d'Hudson. Cette ceinture orogénique d'âge protérozoïque sépare deux blocs adjacents d'origine archéenne, les provinces du Supérieur et de Rae du Bouclier canadien. (fr)
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  • http://commons.wikimedia.org/wiki/Special:FilePath/New_Quebec_Orogen.jpg
  • http://commons.wikimedia.org/wiki/Special:FilePath/New_Quebec_Orogen2.jpg
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  • 56.0 -67.5
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  • The Labrador Trough or the New Quebec Orogen is a 1,600 km (994 mi) long and 160 km (99 mi) wide geologic belt in Canada, extending south-southeast from Ungava Bay through Quebec and Labrador. The trough is a linear belt of sedimentary and volcanic rocks which developed in an Early Proterozoic rift basin. To the west is the Archean Superior Craton. To the east are the rocks of the Archean Rae Craton. The sedimentary rocks and volcanics of the Labrador Trough were intensely deformed and subjected to high grade metamorphism along with the Churchill terrain during the Trans-Hudson orogeny. It is a northeast extension of the Circum-Superior Belt and is terminated to the south by the Grenville Front Tectonic Zone. Radiometric dates of 1883-1870 Ma are reported for mafic, ultramafic, carbonatite and lamprophyre intrusions within the Trough. It is a large iron ore belt developed on banded iron formations and has had mining operations since 1954. At least two large magmatic events occurred in the Labrador Trough. The first event 2,170 million years ago engulfed an area of 30,000 km2 (12,000 sq mi) and the second 1,880 million years ago covered a similar area of 30,000 km2 (12,000 sq mi). (en)
  • L'orogène du Nouveau-Québec, aussi connu sous le nom fosse du Labrador est une bande étroite de roches sédimentaires et ignées large de 160 km et longue de 1 200 km qui traverse le nord du Québec (Canada) du lac Manicouagan au détroit d'Hudson. Cette ceinture orogénique d'âge protérozoïque sépare deux blocs adjacents d'origine archéenne, les provinces du Supérieur et de Rae du Bouclier canadien. La « fosse », comme elle est appelée familièrement par les géologues, est connue pour ses riches gisements de fer, et renferme de nombreux autres métaux dont le manganèse, le nickel, le cuivre, le palladium, le platine, le zinc, l'or, l'uranium, le zirconium, l'yttrium, le niobium, le béryllium et les terres rares. La reconnaissance géologique de cette zone a débuté à la fin du XIXe siècle avec les expéditions d'Albert Peter Low pour le compte de la Commission géologique du Canada, entre 1892 et 1899. La recherche intensive du fer a débuté en 1929, suivie quelques années plus tard de la recherche pour des métaux de base.L'exploitation des gisements miniers de l'orogène du Nouveau-Québec constitue un objectif majeur du Plan Nord, une initiative de développement économique dans le Nord-du-Québec annoncée par le gouvernement du Québec en 2011. (fr)
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