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- W1607171507 abstract "The northern segment of the New Quebec Orogen is divided into 4 zones, based on lithostratigraphic assemblages and deformational style. The tectonic fabric is the result of WSW-SW transport during the third deformation event, which, in the foreland, consists of two stages. A basal decollement, low-angle thrust faults and bedding-parallel gliding in the western foreland are important features of the early D3 stage. The bulk of crustal shortening occurred during the late D3 (D3,) stage, which is characterized by large-scale, high-angle out-of-sequence thrusts, and folds. The hinterland records more complex pre-D3' deformation, which cannot presently be correlated with early deformation in the foreland. The D3' out-of-sequence geometry is probably the result of syntectonic erosion of the orogenic wedge, but there is little geological evidence in the foreland supporting this premise. This apparent paradox can be explained by invoking a two-sided, double-wedge orogenic model, which links erosion and uplift in the hinterland to out-of-sequence thrusting in the foreland.ResumeLa partie septentrionale de l'orogene du Nouveau-Quebec se divise en quatre zones en fonction des assemblages lithostratigraphiques et du style structural. Le grain tectonique regional resulte d'un transport de ces zones vers le WSW-SW lors de la troisieme phase de deformation qui comprend, dans l'avant-pays, deux phases. La phase precoce (D3) est caracterisee par un decollement basal et des chevauchements en serie dans la partie est de l'avant-pays et par des glissements paralleles aux strates dans la partie ouest. La phase tardive (D3'), surtout responsable de l'epaississement crustal, est caracterisee par un ensemble generalise de grands plis et de failles de chevauchement hors serie abruptes. Larriere-pays presente des structures pre-D3' plus complexes qui ne peuvent etre correlees avec celles de l'avant-pays. L'agencement horsserie D3' provient probablement de l'erosion syn-orogenique du prisme tectonique, mais on observe peu d'evidence de cette erosion dans l'avant-pays. Cette disparite correspond peut-etre au modele de double prismes tectoniques opposes, qui relie l'erosion et le soulevement de l'arriere-pays aux chevauchements hors serie de l'avant-pays." @default.
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- W1607171507 date "1990-12-12" @default.
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- W1607171507 title "Deformational style in the foreland of the northern New Québec Orogen" @default.
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