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TitleGeochemical and isotopic data used to infer the origins of natural gas in groundwater of the Saint-Édouard area, southern Québec
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LicencePlease note the adoption of the Open Government Licence - Canada supersedes any previous licences.
AuthorBordeleau, G; Rivard, CORCID logo; Lavoie, DORCID logo; Lefebvre, R; Malet, X; Ahad, J M EORCID logo
SourceGeological Survey of Canada, Open File 8505, 2019, 85 pages, https://doi.org/10.4095/321053 Open Access logo Open Access
Image
Year2019
PublisherNatural Resources Canada
Documentopen file
Lang.English
Mediaon-line; digital
File formatreadme
File formatpdf (Adobe® Reader®); rtf; xlsx (Microsoft® Excel®)
ProvinceQuebec
NTS21L/12
AreaSaint-Édouard
Lat/Long WENS -72.0000 -71.5000 46.7500 46.5000
Subjectshydrogeology; environmental geology; fossil fuels; geochemistry; Nature and Environment; Science and Technology; groundwater resources; aquifers; groundwater geochemistry; groundwater pollution; water quality; petroleum resources; hydrocarbons; gas; methane; bedrock geology; lithology; sedimentary rocks; structural features; faults; folds; isotopic studies; carbon isotopes; hydrogen isotopes; oxygen isotopes; radioisotopes; radon; tritium; chlorine; hydrocarbon migration; flow regimes; fluid flow; well samples; geochemical analyses; metals; major element analyses; analytical methods; sampling methods; organic carbon; brine; St. Lawrence Platform; Lorraine Group; Pontgravé Formation; Nicolet Formation; Sainte-Rosalie Group; Lotbinière Formation; Utica Shale; Les Fonds Formation; Bourret Formation; Trenton Group; Potsdam Group; Beekmatown Group; Chazy Group; Black River Group; Aston Fault; Jacques-Cartier River Fault; Logan's Line; contamination; alkanes; shale gas; inorganic carbon; naphthenic acids; methodology; quality control; volatile organic compounds; Phanerozoic; Paleozoic; Ordovician
Illustrationsgeoscientific sketch maps; stratigraphic columns; plots; tables; location maps; bar graphs; profiles; models; time series; histograms
ProgramEnvironmental Geoscience, Shale Gas - groundwater
Released2019 11 26
Abstract(Summary)
SUMMARY
Summary(Plain Language Summary, not published)
This Open File documents groundwater geochemical data in the St-Édouard-de-Lotbinière area, Quebec. The work was conducted within the framework of a multidisciplinary project on potential impacts of shale gas activities on shallow groundwater in this region, where the Utica Shale below (~2 km) was targeted for shale gas exploration between 2006 and 2010. Geochemical analyses included concentrations of ions, gases and trace metals, as well as isotopic analyses on water, dissolved inorganic carbon, alkanes, chloride, and strontium. The results provided key information on the origin of hydrocarbons found in groundwater and on possible upward fluid migration. The general conclusion is that hydrocarbons (mostly methane) in groundwater come from the shallow bedrock itself and not from the Utica Shale. Nonetheless, some evidence of upward flow was found near a normal fault, but this upward migration is inferred to be limited to a depth of few hundred meters.
GEOSCAN ID321053

 
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