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Cambrian to Mississippian metasedimentary and metavolcanic rocks of the Eagle Bay Assemblage in the Adams Lake area of south central interior British Columbia host numerous polymetallic sulphide deposits. This paper describes the Samatosum and Rea massive sulphide deposits located in that area, their geological settings, structure, metamorphism, and mineralization. Some fundamental structural & stratigraphic problems in the region are addressed, and implications for understanding the genesis of the sulphide mineralization are discussed.
Reports findings of reconnaissance seismic surveys conducted on the north-east Grand Bank to study the near-surface sediments, assess the presence and characteristics of seabed geotechnical hazards, and examine the role of Quaternary glaciation and sea-level fluctuation on sediment distribution and characteristics. The regional setting is first reviewed and a refined regional stratigraphy is described based on new seismic data. Till deposits and moraine fields as observed from the seismic studies of the shelf glacial sediments are described. Finally, interpretations of the glacial history of the study area are offered and implications of the findings for offshore engineering related to oil & gas development are discussed.
Cores drilled from a quarry north of Montreal show a distinct lithostratigraphic unit occurring below the Upper Cambrian Cairnside Formation. The unit was previously considered as the Covey Hill Formation of the Lower Potsdam Group. This paper describes the regional geological setting, lithology, and depositional environment of this unit. Evidence for considering the unit as part of the Rivière Aux Outardes Member (Clark, 1966) is presented. Correlations with other stratigraphic units in southern Quebec are discussed along with evidence for a possible Cambrian carbonate platform in the region. Two scenarios of possible regional depositional episodes are also hypothesized.
A well-exposed section about 250 metres wide below the high water line of the Jennings River, Teslin Lake map area in northern British Columbia shows part of the Teslin Fault and provides an opportunity to constrain the fault's kinematic history by direct ground observations. This report describes preliminary structural observations of this section of the Teslin Fault, including the rock types involved, mylonitic & ultramylonitic structures, and deformation. Indications of two main episodes of shearing are discussed.