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Archean greenstone belts typically form narrow sheared basins separating bulbous tonalo–trondjhemo–granodioritic (TTG) intrusive complexes. The role played by gravity in the development of such dome-and-keel structures constitutes a key question in Archean tectonics. The Pukaskwa intrusive complex (PIC)–Hemlo greenstone belt system stands as a remarkable example of the dome-and-keel architecture that...
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