Citation |
Hamblin, A P; McCartneny, T; 2014; The hydrogeological characteristics of the Upper Cretaceous De Courcy Formation (Nanaimo Group), from a subsurface core, groundwater observation well, Cedar, British Columbia; Geological Survey of Canada, Open File 7628, 2014; doi:10.4095/294859; 30p. |
Abstract/Description or Keywords |
A new inquiry into the groundwater potential of the Nanaimo Lowlands. The bedrock component of the project focused on the characterization of the aquifer potential of the Upper Cretaceous Nanaimo Group, as a likely target of importance. As one step in the analysis, a 112.5 m core was obtained as part of the drilling of a Groundwater Observation Well in the Cedar area of Vancouver Island, about 10 km SE of Nanaimo City centre. The thick bedded sandstone facies represents about 65% of the strata in the core, and has porosity ranging 2.0 to 10.2 %, averaging 6.8 %, and permeability ranging 2.8 to 105.0 mD, averaging 24.4 mD. The interbedded siltstone and thin sandstone facies occupies about 35% of the core strata and has porosity ranging 4.0 to 9.7 %, averaging 7.4 %, and overall permeability ranging 1.8 to 40.0 mD, averaging 12.7 mD. |