M. D. Thomas, R. A. Gibb; Gravity anomalies and deep structure of the Cape Smith foldbelt, northern Ungava, Quebec. Geology ; 5 (3): 169–172. doi: https://doi.org/10.1130/0091-7613(1977)5<169:GAADSO>2.0.CO;2
Download citation file:
The deep structure of the Proterozoic Cape Smith fold-belt, which occurs at the boundary between the Superior and Churchill structural provinces of the Canadian Shield, is derived quantitatively from gravity anomalies. Basaltic rocks of the fold-belt are interpreted in part as remnant blocks of oceanic crust tectonically emplaced by obduction on shelf deposits of the ancient Superior margin. They form part of a proposed circum-Superior suture between collided Superior and Churchill cratons. The structure derived from gravity-anomaly data is compared with a conceptual model of continental convergence, collision, and suturing.