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TitleLithological and hydrogeological properties from a downhole geophysical dataset in the Vars-Winchester esker, Ontario
DownloadDownload (whole publication)
LicencePlease note the adoption of the Open Government Licence - Canada supersedes any previous licences.
AuthorCrow, H LORCID logo; Pugin, A J -M; Dietiker, BORCID logo; Paradis, DORCID logo; Brewer, K; Cartwright, T; Griffiths, MORCID logo; Russell, H A JORCID logo
SourceSouthern Ontario groundwater project 2014-2019: summary report; by Russell, H A JORCID logo (ed.); Kjarsgaard, B AORCID logo (ed.); Geological Survey of Canada, Open File 8536, 2020 p. 147-157, Open Access logo Open Access
PublisherNatural Resources Canada
Documentopen file
Mediaon-line; digital
RelatedThis publication is contained in Southern Ontario groundwater project 2014-2019: summary report
File formatpdf
Lat/Long WENS -75.3264 -75.2975 45.3161 45.2722
Subjectshydrogeology; surficial geology/geomorphology; geophysics; Nature and Environment; Science and Technology; groundwater; groundwater resources; aquifers; glacial deposits; glacial landforms; glacial features; eskers; sands; gravels; postglacial deposits; muds; rhythmites; lithology; boreholes; geophysical logging; gamma ray logging; conductivity; magnetic susceptibility; density logging; hydraulic analyses; porosity; grain size analyses; geophysical interpretations; seismic interpretations; Vars-Winchester Esker; Champlain Sea Sediments; Phanerozoic; Cenozoic; Quaternary
Illustrationslocation maps; geophysical logs; lithologic sections; seismic reflection profiles; tables
ProgramGroundwater Geoscience Aquifer Assessment & support to mapping
Released2020 05 28
AbstractA study examining the relationship between hydraulic and geophysical properties is underway in the South Nation Conservation Area, southeast of Ottawa, Ontario. Groundwater resources for the local community are drawn from a sand and gravel esker, which is capped by a thick sequence of post-glacial massive to laminated mud sediment. Surface geophysical techniques (high-resolution seismic and electrical resistivity) identified the depth, shape, and general stratigraphy of the esker within the 2-km study area. Four boreholes were then drilled into the center and flanks of the esker to install fully screened PVC casings to conduct hydraulic packer testing and downhole geophysical logging. The geophysical log suite provided a number of insights into the esker stratigraphy and overlying Champlain Sea mud. Gamma, conductivity, magnetic susceptibility, and density logs refined the depths of lithological boundaries and the nature of these contacts (abrupt vs transitional). Bulk conductivity profiles revealed differences in pore water conductivities in the mud sediments overlying and lateral to the esker. Magnetic susceptibility logs revealed the presence of stratigraphic layering within the esker, which nuclear magnetic resonance (NMR) logs identified as having variable porosity.
Summary(Plain Language Summary, not published)
Collection of papers on work completed in the past five years as part of the southern Ontario Groundwater Project. This edited volume is a collection of currently unreported work.

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