New reflections on the structure and evolution of the Makkovikian - Ketilidian Orogen in Labrador and southern Greenland

Article Abstract:

Marine seismic reflection profiles suggest that the Early Proterozoic Makkovikian - Ketilidian Orogen in the Labrador Sea region is a doubly vergent, asymmetric orogenic belt. The correlation of a southeast dipping reflector package with on-land shear zones documents the transition from ancient to juvenile. Contrasting crustal and subcrustal reflectivity patterns define a geometric focus below the orogenic belt and could provide subduction polarity information.

Research, Geology, Stratigraphic, Stratigraphy, Proterozoic Eon

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Seismic images and three-dimensional architecture of a Proterozoic shear zone in the Sudbury Structure (Superior Province, Canada)

Article Abstract:

A three-dimensional image of a wide zone of intense ductile to brittle deformation in the Paleo-Proterozoic Sudbury Igneous Complex in Superior Province, Canada, is presented. It is suggested that there are limits to the extent of deformation in the Sudbury Structure.

Canada, Faults (Geology)

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