Volume 16, Number 3 (1989)
Articles

The 1998 Ma Purtuniqophiolite: imbricated and metamorphosed oceanic crust in the Cape Smith Thrust Belt, northern Quebec

D. J. Scott
Department of Geological Sciences, Queen's University, Kingston, Ontario.
M. R. St-Onge
Geological Survey of Canada, Ottawa, Ontario.
S. B. Lucas
Geological Survey of Canada, Ottawa, Ontario.
H. Helmstaedt
Department of Geological Sciences, Queen s University, Kingston, Ontario.
Published September 9, 1989
How to Cite
Scott, D. J., St-Onge, M. R., Lucas, S. B., & Helmstaedt, H. (1989). The 1998 Ma Purtuniqophiolite: imbricated and metamorphosed oceanic crust in the Cape Smith Thrust Belt, northern Quebec. Geoscience Canada, 16(3). Retrieved from https://journals.lib.unb.ca/index.php/GC/article/view/3614

Abstract

A sequence of rocks representing obducted oceanic crust (an ophiolite) has been identified in the Cape Smith Belt. The physical and chemical nature of this 1998 Ma ophiolite is similar to rocks from Phanerozoic ophiolites and modern oceans, implying that tectonic processes similar to those operating today were active nearly two billion years ago. At that time, northern Quebec may have been tectonically similar to the modern Red Sea. Résumé Une séquence de roches caractérisant une croûte océanique obductée (une ophiolite) a été identifée dans la bande du Cap Smith. Les aspects physiques et chimiques decette ophiolite datée à 1998 Ma sont semblables à ceux des ophiolites phanérozoïque et des océans modernes. L'implication est queles processus tectoniques modernes sont semblables à ceux qui étaient actifs il y a deux milliards d'années. A ce temps là, lenord du Québec était peutêtre similaire à lamer Rouge actuelle.