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TitleStructural geology of the eastern Richardson Mountains, Yukon and Northwest Territories: some field observations and a note of caution for palinspastic reconstructions
 
AuthorPinet, N
SourceYukon exploration and geology 2020; by MacFarlane, K E (ed.); Yukon Geological Survey, Yukon Exploration and Geology 2020, 2020 p. 1-18 Open Access logo Open Access
LinksOnline - En ligne
Image
Year2020
Alt SeriesNatural Resources Canada, Contribution Series 20200527
PublisherDepartment of Energy, Mines and Resources, Government of Yukon (Whitehorse, Canada)
Documentserial
Lang.English
Mediaon-line; digital
File formatpdf
ProvinceYukon; Northwest Territories
NTS106E/13; 106E/14; 106E/15; 106E/16; 106L; 106M/01; 106M/02; 106M/03; 106M/04
AreaRichardson Mountains
Lat/Long WENS-136.0000 -134.0000 67.2500 65.7500
Subjectsregional geology; structural geology; tectonics; geophysics; Science and Technology; Nature and Environment; structural analyses; bedrock geology; structural features; faults; folds; anticlinoria; bedding planes; lithology; sedimentary rocks; shales; limestones; siltstones; field relations; field work; strain analysis; tectonic setting; deformation; faulting; kinematic analysis; displacement; geophysical interpretations; gravity interpretations; bouguer gravity; gravity anomalies; magnetic interpretations; seismic interpretations; palinspastic interpretations; Canadian Cordillera; Cordilleran Orogen; Richardson Anticlinorium; Eagle Plain; Peel Plateau; Deception Fault; Deslauriers Fault; Knorr Fault; Caribou Fault; Trevor Fault; Richardson Fault; Tetlit Fault; Tetlit Fault Zone; Imperial Formation; Canol Formation; Michelle Formation; Ogilvie Formation; Road River Group; Slats Creek Formation; Illtyd Formation; Ford Lake Shale; Kamik Formation; Whitestone River Formation; Phanerozoic; Mesozoic; Phanerozoic; Permian; Carboniferous; Devonian; Silurian; Ordovician; Cambrian; Precambrian; Proterozoic
Illustrationslocation maps; geoscientific sketch maps; cross-sections; photographs; stereonet projections; block diagrams; graphs; sketches
ProgramGEM: Geo-mapping for Energy and Minerals Energy Component Coordination
Released2021 01 01
AbstractThe Richardson anticlinorium is a major tectonic feature marking the eastern limit of the Cordilleran orogen in northern Yukon and Northwest Territories. Limited structural observations on the eastern flank of the Richardson anticlinorium indicate that the strain intensity increases significantly close to major faults that are associated with deformation zones tens to hundreds of metres wide. A predominant dextral sense of motion is documented for several major faults belonging to the Richardson fault array. However, second-order features exhibit highly variable kinematics. In several cases, strike-slip faults cut shallower dipping faults and follow steep bedding planes, suggesting that dextral motion occurred in a previously deformed and tilted sedimentary succession. The amount of displacement along the Richardson fault array is poorly constrained. Further investigation is warranted as potential large displacements may bear significant consequences on palinspastic reconstructions.
Summary(Plain Language Summary, not published)
This study report limited structural observations on the eastern flank of the Richardson anticlinorium, which marks the eastern boundary of the Canadian Cordillera in northern Yukon. Major faults are associated with tens to a hundred of metres wide deformation zones and may record poorly constrained but potential significant displacements that should be kept in mind for geological reconstructions of the area.
GEOSCAN ID327549

 
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