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TitleFar-field effects of Appalachian orogenesis: A view from the craton
AuthorPinet, N
SourceGeology vol. 44, no. 2, 2015 p. 83-86,
Alt SeriesEarth Sciences Sector, Contribution Series 20150326
PublisherGeological Society of America
Mediapaper; on-line; digital
File formatpdf
ProvinceNew Brunswick; Newfoundland and Labrador
NTS35; 36; 37; 45; 46; 47; 55; 56; 57; 65; 66; 67; 75; 76; 77
AreaHudson Bay
Lat/Long WENS-110.0000 -70.0000 70.0000 40.0000
Subjectsregional geology; tectonics; orogenic regions; seismic profiles; intracratonic basins; faults, normal; faults, strike; faults, slip; plate motions; tectonic history; tectonic setting; tectonic interpretations; deformation; Appalachian Orogeny; Hudson Bay Basin; Appalachian Tectonic event; Hudson Bay central high; Paleozoic; Devonian
Illustrationslocation maps; structural maps; cross-sections, structural; schematic cross-sections; gravity profiles
ProgramHudson/Ungava, Stratigraphy Petroleum Basins, GEM2: Geo-mapping for Energy and Minerals
Released2015 12 22
AbstractThe sedimentary cover of the North American craton preserved little evidence of the Paleozoic tectonic events that shaped the Appalachian orogen on its eastern side. A notable exception is the NNW-trending Hudson Bay Central High (HBCH) which corresponds to a normal fault array extending for a minimum length of 500 km. A working hypothesis is proposed in which stresses applied to the continental margin during the Silurian-earliest Devonian Salinian orogeny were transmitted over a distance of > 1400 km in the continental interior where they induce the normal-fault reactivation of older structural discontinuities. The shutdown of tectonic activity along the HBCH during the Middle Devonian is interpreted as resulting from a change in the direction of plate convergence during the Acadian orogeny.
Summary(Plain Language Summary, not published)
The Canadian Shield is often considered as 'stable' since its formation. This publication demonstrates that tectonic events that shaped the Appalachians 425 million years ago had pronounced effects in the continental interior, and especially in the Hudson Bay region.