A Structural Analysis of an Anticline-Syncline Pair in the Labrador Trough Near Schefferville, P. Q.

Abstract

<p> A syncline-anticline pair in miogeosynclinal sediments of the western margin of the Labrador Trough was mapped. Samples were taken of each rock unit and a structural analysis was performed. The structure determined was compared in an elementary fashion to geophysics completed over the mapping area. </p> <p> The folds in the pair are highly variable along their length changing from an open to tight folding style and with a rolling plunge varying from 3° NW to 12° SE. </p> <p> The beds of the folds show no internal deformation except for drag folding in the shaly units. The rocks were folded by a flexural slip mechanism. </p> <p> The gravity and ground magnetics successfully outlined the structure of the fold, dipping of the beds and in one instance located a fault. Typical gravity values (signatures) for a number of rock units are easily determined.</p>