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Geology Of An Archean Greenstone Belt At Point Lake, Northwest Territories, Canada, Patrick Rowan Considine
Geology Of An Archean Greenstone Belt At Point Lake, Northwest Territories, Canada, Patrick Rowan Considine
OES Theses and Dissertations
Several well-preserved circa 2.6 Ga Archean granite-greenstone belts are exposed in the Slave Province of Northwest Territories, Canada. At Point Lake, a "supracrustal sequence" comprised mainly of mafic volcanic and metasedimentary rocks lies over and east of a granitoid gneissic terrane. Field and laboratory studies have helped to clarify the petrography and structural relationships of this fold-and-thrust belt. Traditional models have suggested that granite-greenstone belts in the Slave Province are relict continental rifts in which volcanic and sedimentary rocks filled troughs in older sialic crust. However, this study supports a collisional model for the Slave Province, in which oceanic crust …