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TitleA chemostratigraphic characterization of Newmarket Till in drill core from north of Lake Ontario
DownloadDownload (whole publication)
LicencePlease note the adoption of the Open Government Licence - Canada supersedes any previous licences.
AuthorStepner, D A J; Kjarsgaard, B AORCID logo; Knight, R AORCID logo; Russell, H A JORCID logo; Sharpe, D RORCID 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. 109-119, 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
NTS30M/11; 30M/14; 30M/15; 31D/02; 31D/03; 31D/04; 31D/05; 31D/06; 31D/07; 31D/11; 31D/12; 31D/13; 31D/14
AreaLake Ontario; Toronto; Lake Simcoe
Lat/Long WENS -80.0000 -78.5000 45.0000 43.5000
Subjectssurficial geology/geomorphology; geochemistry; stratigraphy; Nature and Environment; Science and Technology; till geochemistry; till stratigraphy; stratigraphic analyses; stratigraphic correlations; glacial deposits; glacial features; tills; sands; geochemical analyses; glacial history; glaciation; ice flow; depositional history; boreholes; core samples; x-ray fluorescence analyses; spectrometric analyses; trace element analyses; grain size analyses; provenance; Newmarket Till; St. Lawrence Lowlands; Canadian Shield; ice-flow directions; Trends; Phanerozoic; Cenozoic; Quaternary
Illustrationsgeoscientific sketch maps; correlation sections; tables; plots; profiles; lithologic sections
ProgramGroundwater Geoscience Aquifer Assessment & support to mapping
ProgramOak Ridges Moraine NATMAP Project
Released2020 05 28
AbstractThe Newmarket Till (NT) covers much of the south-central Ontario forming a regional stratigraphic marker. Geochemical analysis was performed using aqua regia, four-acid, and flux-fusion digestion on 137 samples of NT collected from 8 boreholes across two regional transects to quantify potential geochemical variations through the till. The geochemistry of the <63 ?m size fraction exhibits strong elemental correlations between major and trace element contents and CaO. All major elements exhibit negative correlations with CaO contents indicative of the incorporation of Paleozoic carbonates flooring the southern Ontario Basin. A chemical ratio of CaO+MgO/SiO2+Al2O3 (Provenance Indicator) suggest significant quantities of material from the Paleozoic carbonates were incorporated into the till matrix as ice moved south of the Canadian Shield. High precision sampling using portable XRF methods for a continuous sediment core located near Pickering Ontario, allowed for the identification of 4 geochemical subfacies unidentifiable on the macro scale along with 3 interbeds. These geochemical subunits in the NT cannot be traced to nearby boreholes and hence do not have regional extent.
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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