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TitleLow-angle faulting in strike-slip dominated settings: seismic evidence from the Maritimes Basin, Canada
AuthorPinet, N; Dietrich, J; Duchesne, M JORCID logo; Hinds, S J; Brake, V
SourceTectonophysics vol. 738-739, 2018 p. 33-40,
Alt SeriesNatural Resources Canada, Contribution Series 20180031
PublisherElsevier BV
Mediapaper; on-line; digital
File formatpdf; html
ProvinceEastern offshore region; New Brunswick; Newfoundland and Labrador; Nova Scotia; Prince Edward Island; Quebec
NTS11J; 11K; 11L; 11M; 11N; 11O; 12A; 12B; 12C; 21I; 21P; 22A
AreaGulf of St. Lawrence
Lat/Long WENS -66.0000 -58.0000 49.0000 46.0000
Subjectsmarine geology; tectonics; geophysics; bedrock geology; structural features; faults; faults, strike-slip; sedimentary basins; basin evolution; tectonic history; geophysical interpretations; seismic interpretations; seismic reflection surveys; seismic data; gravity interpretations; gravity anomalies; bouguer gravity; modelling; terranes; accretion; geodynamics; marine sediments; salt tectonics; isopachs; lithostratigraphy; Maritimes Basin; Appalachian Province; Acadian Orogeny; Laurentia; Rheic Ocean; Belleisle Fault; Cabot Fault; Calabria-Sardinia Terrane; Meguma Terrane; Nashoba Terrane; Bras Nord-Ouest Fault; Bradelle well; Bradelle Sub-Basin; North Point Sub-Basin; Chaleurs-Bay Fault; Horton Group; Fountain Lake Group; Phanerozoic; Paleozoic; Permian; Carboniferous; Devonian
Illustrationsgeoscientific sketch maps; stratigraphic sections; seismic profiles; cross-sections; models; block diagrams
ProgramGSC Quebec Division
Released2018 05 15
AbstractThe Maritimes Basin is an upper Paleozoic sedimentary basin centered in the Gulf of St. Lawrence (Canada). Early phases of basin formation included the development of partly connected sub-basins bounded by high-angle faults, in an overall strike-slip setting. Interpretation of reprocessed seismic reflection data indicates that a low-angle detachment contributed to the formation of a highly asymmetric sub-basin. This detachment was rotated toward a lower angle and succeeded by high-angle faults that sole into the detachment or cut it. This model bears similarities to other highly extended terranes and appears to be applicable to strike-slip and/or transtensional settings.
Summary(Plain Language Summary, not published)
The Maritimes Basin is a large sedimentary basin that covers the Gulf of St. Lawrence and part of Atlantic Canada provinces. The early phase of basin formation has been traditionally interpreted as related to motions along steeply-dipping faults. Interpretation of reprocessed seismic data recorded in 1986 by Natural Resources Canada indicates that a low-dipping fault also contributed to basin formation. This interpretation has a regional significance and may be potentially applicable in similar basin around the world.

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