Volume 17, Number 4 (1990)
Articles

Tectonic evolution of the Kuujjuaq terrene, New Québec Orogen

Serge Perreault
Department of Geological Sciences, McGill University, Montréal, Québec.
Andrew Hynes
Department of Geological Sciences, McGill University, Montréal, Québec.
Published December 12, 1990
How to Cite
Perreault, S., & Hynes, A. (1990). Tectonic evolution of the Kuujjuaq terrene, New Québec Orogen. Geoscience Canada, 17(4). Retrieved from https://journals.lib.unb.ca/index.php/GC/article/view/3695

Abstract

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.