| Title | Structural geology of the eastern Richardson Mountains, Yukon and Northwest Territories: some field observations and a note of caution for palinspastic reconstructions |
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| Author | Pinet, N |
| Source | Yukon exploration and geology 2020; by MacFarlane, K E (ed.); Yukon Geological Survey, Yukon Exploration and Geology 2020, 2020 p. 1-18  Open Access |
| Links | Online - En ligne
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| Image |  |
| Year | 2020 |
| Alt Series | Natural Resources Canada, Contribution Series 20200527 |
| Publisher | Department of Energy, Mines and Resources Canada |
| Document | serial |
| Lang. | English |
| Media | on-line; digital |
| File format | pdf |
| Province | Yukon; Northwest Territories |
| NTS | 106E/13; 106E/14; 106E/15; 106E/16; 106L; 106M/01; 106M/02; 106M/03; 106M/04 |
| Area | Richardson Mountains |
| Lat/Long WENS | -136.0000 -134.0000 67.2500 65.7500 |
| Subjects | regional 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 |
| Illustrations | location maps; geoscientific sketch maps; cross-sections; photographs; stereonet projections; block diagrams; graphs; sketches |
| Program | GEM: Geo-mapping for Energy and Minerals Energy Component Coordination |
| Released | 2021 01 01 |
| Abstract | The 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 ID | 327549 |
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