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TitleIntegrated data sets from a buried valley borehole, Champlain Sea basin, Kinburn, Ontario
AuthorMedioli, B E; Alpay, S; Crow, H L; Cummings, D I; Hinton, M J; Knight, R D; Logan, C; Pugin, A J -M; Russell, H A J; Sharpe, D R
SourceGeological Survey of Canada, Current Research (Online) no. 2012-3, 2012, 20 pages, (Open Access)
PublisherNatural Resources Canada
Mediaon-line; digital
File formatpdf
Lat/Long WENS -76.5000 -76.0000 45.5000 45.2500
Subjectshydrogeology; geophysics; stratigraphy; buried valleys; aquifers; sedimentary rocks; clays; basins; basin analyses; seismic interpretations; seismic data; seismic surveys; seismic reflection surveys; glaciomarine deposits; facies; Champlain Sea basin; Cenozoic; Quaternary
Illustrationslocation maps; seismic sections; stratigraphic columns; plots; photomicrographs
ProgramGroundwater Geoscience, Aquifer Assessment & support to mapping
Released2012 04 11
AbstractData from a 97 m continuously cored borehole (GSC-BH-JSR-01), near Kinburn, Ontario, contribute to our knowledge of the geology, hydrogeology, and geotechnical properties of clay-rich, glaciated basins, and, specifically, the Champlain Sea basin. Physical properties, downhole geophysics, portable XRF bulk-sediment geochemical composition, micropaleontological results, and pore-water geochemistry data are integrated with detailed, sedimentological descriptions to provide a multidisciplinary data set similar to the 'golden spikes' of southern Ontario. Seismic-reflection data provide a basin architectural framework in which to interpret these results. The Kinburn data set is interpreted to record the retreat of the regional ice sheet, the incursion of the Champlain Sea, and the withdrawal of marine waters from the basin during continued ice retreat and isostatic rebound. The sediment package sits within a bedrock basin and consists of a basal, coarse-grained unit (possibly an esker), overlain by nearly 90 m of clay-rich, marine sediments (locally known as leda clay), and is capped by an 8 m thick silt-rich, nonmarine facies. Ultimately, the sedimentological, stratigraphic, and geochemical data collected from the Kinburn Golden Spike will provide a better understanding of glaciomarine sediments within the Champlain Sea of eastern Ontario and western Quebec. The large thickness of mud, the preservation of pore water chemistry, and the multidisciplinary data sets make the Kinburn site a key reference site for the geology, hydrogeology, and seismic-hazard assessment of the Champlain Sea basin.