TY - JOUR AU - Perreault, Serge AU - Hynes, Andrew PY - 1990/12/12 Y2 - 2024/03/29 TI - Tectonic evolution of the Kuujjuaq terrene, New Québec Orogen JF - Geoscience Canada JA - GS VL - 17 IS - 4 SE - Articles DO - UR - https://journals.lib.unb.ca/index.php/GC/article/view/3695 SP - AB - The Kuujjuaq terrane of the New Québec Orogen may represent a northern extension of the De Pas batholith, which is thought to be the remnant of a lower Proterozoic continental magmatic arc. Collision between the Kuujjuaq terrane and the Labrador Trough to the west produced intense deformation, associated with large-scale, southwest-directed transport. The Kuujjuaq batholith, thought to be a subduction-related granitoid suite, was emplaced at a late stage in the deformation. Extensive post-tectonic metamorphism involved retrogression of early granulite-facies mineral assemblages. Our interpretation is that the Kuujjuaq terrane was subjected to deep and protracted burial (>40 m.y.). This is consistent with, and most easily explained by, its development within a major continental collision zone such as that between India and Asia. ER -