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The Churchill Craton is the northwest section of the Canadian Shield and stretches from southern Saskatchewan and Alberta to northern Nunavut. It has a very complex geological history punctuated by at least seven distinct regional tectonometamorphic intervals, including many discrete accretionary magmatic events. The Western Churchill province is the part of the Churchill Craton that is exposed north and west of the Hudson Bay. The Archean (ca. 1.83 Ga) Western Churchill province contributes to the complicated and protracted tectonic history of the craton, and marks a major change in the behaviour of the Churchill Craton with many remnants of Archean supracrustal and granitoid rocks. ==Major tectonometamorphic intervals== * 2.69 Ga: deformation in the northern Hearne Domain. * 2.685 Ga: greenschist-grade metamorphism and deformation in the central Hearne Domain. * 2.60 Ga: granitoid plutonism across the northern Hearne and Rae Domains. * 2.50-2.55 Ga: metamorphism and deformation in the northern Hearne domain. * 1.9 Ga: metamorphism and deformation in the northern Hearne Domain. * 1.83 Ga: magmatism and deformation in the northern Hearne and Rae Domains. * 1.755 Ga: plutonism in the western Hearne and eastern Rae Domains. (Sandeman, 2001) 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Churchill Craton」の詳細全文を読む スポンサード リンク
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