A Deep-seated Gravitational Slope Deformation in the northern Monashee Complex, Monashee Mountains, British Columbia, Canada

The primary goal of this work is to establish and apply a conceptual framework for the study of a Deep-seated Gravitational Slope Deformation (DsGSD) in the Blais Creek Area (Monashee Mountains, British Columbia, Canada). This goal has been reached by performing field investigations, including detailed geological and geomorphological mapping of the Blais Creek Area and integrating the results of previous stratigraphic and structural studies along the west flanks of the Frenchman Cap Dome (northern Monashee Mountains, British Columbia, Canada; Journeay’s Phd Thesis). A secondary goal is to reconstruct the evolutionary stages of slope deformation and to evaluate its controlling factors by integrating orthophotos, stereo models and 3D models of the DsGSD with field and literature data concerning tectonic and glacial history of the Seymour Valley. The last goal of this work is to evaluate general geomechanical properties of the deforming rock mass for use in possible future numerical models in order to investigate the failure mechanism at Blais Creek and to define a geomechanical characterization of different portions of the DsGSD.