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NARROW
GeoRef Subject
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all geography including DSDP/ODP Sites and Legs
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Canada
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Eastern Canada
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Newfoundland and Labrador
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Newfoundland
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Notre Dame Bay (1)
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Ontario
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Algoma District Ontario
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Wawa Ontario (1)
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Cochrane District Ontario
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Abitibi Ontario (1)
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Larder Lake District Ontario (1)
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Western Canada
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Manitoba
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Snow Lake Manitoba (1)
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Saskatchewan
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La Ronge Domain (1)
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North America
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Canadian Shield
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Flin Flon Belt (2)
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Southern Province (1)
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Superior Province
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Abitibi Belt (2)
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Swayze greenstone belt (1)
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commodities
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Proterozoic
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Huronian
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Onaping Formation (1)
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Paleoproterozoic
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Chelmsford Formation (1)
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igneous rocks
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igneous rocks
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diorites
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quartz diorites (1)
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granites (1)
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syenites (1)
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volcanic rocks
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basalts
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tholeiitic basalt (1)
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komatiite (1)
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ankerite (1)
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Primary terms
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absolute age (2)
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Canada
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Eastern Canada
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Newfoundland and Labrador
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Newfoundland
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Notre Dame Bay (1)
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-
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Ontario
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Algoma District Ontario
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Wawa Ontario (1)
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Cochrane District Ontario
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Abitibi Ontario (1)
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Larder Lake District Ontario (1)
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Sudbury District Ontario (1)
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Sudbury igneous complex (1)
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Sudbury Ontario (1)
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Sudbury Structure (4)
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Western Canada
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Manitoba
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Snow Lake Manitoba (1)
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Saskatchewan
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La Ronge Domain (1)
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deformation (13)
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faults (12)
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folds (7)
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foliation (4)
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fractures (1)
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geochemistry (4)
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geophysical methods (2)
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igneous rocks
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plutonic rocks
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quartz diorites (1)
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granites (1)
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syenites (1)
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volcanic rocks
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basalts
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tholeiitic basalt (1)
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inclusions
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isotopes
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lineation (2)
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copper ores (3)
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gold ores (8)
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iron ores (1)
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nickel ores (3)
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platinum ores (2)
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metals
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lead
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Pb-207/Pb-204 (1)
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nickel (1)
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platinum group
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platinum ores (2)
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rare earths (1)
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metamorphic rocks
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amphibolites (1)
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impactites
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impact breccia (1)
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metasedimentary rocks (3)
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metavolcanic rocks (2)
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metamorphism (4)
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metasomatism (1)
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mineral deposits, genesis (9)
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mineral exploration (3)
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North America
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Canadian Shield
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Flin Flon Belt (2)
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Southern Province (1)
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Superior Province
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Abitibi Belt (2)
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Swayze greenstone belt (1)
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Wabigoon Belt (2)
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orogeny (6)
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phase equilibria (1)
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plate tectonics (2)
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Precambrian
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Archean
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Neoarchean (1)
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Levack Gneiss (1)
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upper Precambrian
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Proterozoic
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Huronian
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Onaping Formation (1)
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Paleoproterozoic
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Chelmsford Formation (1)
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sedimentary rocks
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structural analysis (4)
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sedimentary rocks
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The Neoarchean, a turning point for geodynamic and magmatic processes within the Superior craton?
ABSTRACT The Neoarchean is generally considered to have been the final era of major crust formation and may have been characterized by the onset of modern plate tectonics. The Neoarchean may also have been the time interval during which subduction processes prevailed and became global. Evidence from individual cratons around the world suggests that this transition in geodynamic processes may have included diachronous and episodic major changes (i.e., turning points) and a more gradual evolution at the global scale, possibly largely driven by the secular cooling of the mantle and increasing stability of the lithosphere. The Superior craton, Canada, is the largest and best-preserved Archean craton in the world, making it an ideal location in which to investigate the occurrence (or absence) of turning points in the Neoarchean. This contribution examines the changes in geodynamic and magmatic processes that occurred during the Neoarchean, using geochemical data and new insights garnered from isotopic surveys from the southern part of the Superior craton. We summarize current understanding of the evolution of the youngest (southern) part of the Superior craton that led to the stabilization (cratonization) of this continental lithosphere and how this evolution aligns with local and global geodynamic processes.