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The Circum-Superior Belt is a widespread P … The Circum-Superior Belt is a widespread Paleoproterozoic large igneous province in the Canadian Shield of Northern, Western and Eastern Canada. It extends more than 3,400 km (2,100 mi) from northeastern Manitoba through northwestern Ontario, southern Nunavut to northern Quebec. Igneous rocks of the Circum-Superior Belt are mafic-ultramafic in composition, deposited in the Labrador Trough near Ungava Bay, the Cape Smith Belt near the southern shore of Hudson Strait and along the eastern shore of Hudson Bay in its northern portion; the Thompson and Fox River belts in the northwest and the in its southern portion. The Circum Superior Belt also hosts a rare example of Proterozoic Komatiite, in the Winnipegosis komatiite belt. A number of magmatic features are present in the Circum-Superior Belt, including dikes, sills and volcanics that comprise geologic formations. This geologic belt is considered to be a large igneous province because its magmatic rocks were emplaced over an extremely short geological time span. Even though the Circum-Superior Belt was emplaced during an extremely short geological time span, the associated magmas were probably derived from a number of separate sources. Most of the Circum-Superior Belt lies along the margin of the Superior Craton, which is the most extensive fragment of Archean crust on Earth. The Circum-Superior Belt contains two large copper-nickel mining districts; the nickel-bearing Thompson Belt at the northwestern portion of the Superior craton and the Cape Smith Belt at the northern portion of the Circum-Superior Belt.thern portion of the Circum-Superior Belt.
, Il Circum-Superior (Circum Superior Belt i … Il Circum-Superior (Circum Superior Belt in Inglese) è una grande provincia ignea paleoproterozoica situata nello Scudo canadese. Si estende per oltre 3.400 km andando dal nordest del Manitoba attraverso l'Ontario e il sud del Nunavut fino al Québec settentrionale. Le rocce ignee del Circum-Superior hanno una composizione femica e ultrafemica, e sono depositate nel Labrador Trough, vicino alla Baia di Ungava, nella Cape Smith Belt, vicino alle sponde meridionali dello Stretto di Hudson, e lungo le coste orientali della Baia di Hudson. Il Circum-Superior ospita inoltre un raro esempio di roccia vulcanica nota come komatiite. Nel Circum-Superior sono presenti elementi magmatici - come dicchi e sillis - e vulcanici, che comprendono diverse formazioni geologiche. Quest'area geologica è considerata una larga provincia ignea poiché le sue rocce magmatiche si sono depositate durante un tempo geologico estremamente breve. Nonostante ciò è probabile che il magma depositato derivi da diverse fonti separate. Gran parte del Circum-Superior giace lungo il margine del Cratone Superiore, che è il più esteso frammento della crosta terrestre archeana. Il Circum-Superior comprende due grandi distretti minerari di rame e nichel.randi distretti minerari di rame e nichel.
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Map of cratons, orogenies and the Circum-S … Map of cratons, orogenies and the Circum-Superior Belt. Areas associated with the Circum-Superior Belt include: A = New Quebec Orogen, B = Cape Smith Belt, C = Eastern Hudson Bay, D = Thompson region, E = Animikie Basin, F = Western interior of Superior craton., F = Western interior of Superior craton.
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Il Circum-Superior (Circum Superior Belt i … Il Circum-Superior (Circum Superior Belt in Inglese) è una grande provincia ignea paleoproterozoica situata nello Scudo canadese. Si estende per oltre 3.400 km andando dal nordest del Manitoba attraverso l'Ontario e il sud del Nunavut fino al Québec settentrionale. Le rocce ignee del Circum-Superior hanno una composizione femica e ultrafemica, e sono depositate nel Labrador Trough, vicino alla Baia di Ungava, nella Cape Smith Belt, vicino alle sponde meridionali dello Stretto di Hudson, e lungo le coste orientali della Baia di Hudson. Il Circum-Superior ospita inoltre un raro esempio di roccia vulcanica nota come komatiite.o di roccia vulcanica nota come komatiite.
, The Circum-Superior Belt is a widespread P … The Circum-Superior Belt is a widespread Paleoproterozoic large igneous province in the Canadian Shield of Northern, Western and Eastern Canada. It extends more than 3,400 km (2,100 mi) from northeastern Manitoba through northwestern Ontario, southern Nunavut to northern Quebec. Igneous rocks of the Circum-Superior Belt are mafic-ultramafic in composition, deposited in the Labrador Trough near Ungava Bay, the Cape Smith Belt near the southern shore of Hudson Strait and along the eastern shore of Hudson Bay in its northern portion; the Thompson and Fox River belts in the northwest and the in its southern portion. The Circum Superior Belt also hosts a rare example of Proterozoic Komatiite, in the Winnipegosis komatiite belt.tiite, in the Winnipegosis komatiite belt.
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Circum-Superior Belt
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