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TitleGeophysical, geotechnical, geochemical, and mineralogical data sets collected in Champlain Sea sediments in the Municipality of Pontiac, Québec
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AuthorCrow, H L; Alpay, S; Hinton, M J; Knight, R D; Oldenborger, G A; Percival, J B; Pugin, A J -M; Pelchat, P
SourceGeological Survey of Canada, Open File 7881, 2017, 51 pages, https://doi.org/10.4095/301664
Year2017
PublisherNatural Resources Canada
Documentopen file
Lang.English
Mediaon-line; digital
File formatreadme
File formatpdf; xls; xlsx; txt; jpg; las; docx
ProvinceQuebec
NTS31F/08; 31F/09; 31G/05; 31G/12
AreaBreckenridge; Breckenridge Creek; Eardley Escarpment; Pontiac
Lat/Long WENS -76.5000 -75.5000 45.7500 45.2500
Subjectssurficial geology/geomorphology; geophysics; engineering geology; geochemistry; mineralogy; paleontology; marine clays; sensitive clays; silts; marine sediments; landslides; earthquakes; sediment properties; geophysical surveys; seismic interpretations; seismic surveys; seismic reflection surveys; seismic velocities; resistivity surveys, ground; electrical resistivity; geophysical logging; magnetic susceptibility; core samples; mineralogical analyses; x-ray diffraction analyses; scanning electron microscope analyses; x-ray fluorescence analyses; pore water samples; water geochemistry; bedrock geology; topography; basin analysis; grain size analyses; atterberg limits; conductivity; isotopic studies; hydrogen isotopes; oxygen isotopes; fossils; radiometric dating; radiocarbon dating; depositional environment; ecology; seismology; seismographs; Champlain Sea Sediments; Molluscs; geological hazards; microtremors; geotechnical properties; water content; ground motion; Phanerozoic; Cenozoic; Quaternary
Illustrationslocation maps; tables; plots; geoscientific sketch maps; photographs; profiles; geophysical logs; lithologic sections; cross-sections; graphs; spectra; seismic profiles; photomicrographs
ProgramAssessing Earthquake Geohazards, Public Safety Geoscience
Released2017 06 08
Summary(Plain Language Summary, not published)
To characterize the geotechnical properties of sensitive glaciomarine silty clay deposits in the Ottawa Valley, Canada, a series of geophysical surveys were conducted over a buried bedrock basin, 2 km2 and up to 90 m deep, near Gatineau, Quebec. The sub-surface morphology of the bedrock basin was mapped from 193 measurements of Horizontal-to-Vertical spectral ratio (HVSR), and two high resolution shear wave seismic profiles were acquired to delineate 2D sedimentary architecture. Two boreholes were drilled near the centre of the basin to collect samples for geotechnical testing, and to install a 3in PVC casing for geophysical logging. Downhole logs and soil sample tests were used in the interpretation of five electrical resistivity profiles, which identified zones where the geotechnical sensitivity of the soils was locally elevated. Lab tests of the samples also allowed for the study of pore water chemistry and sediment mineralogy. The results of these studies provide input parameters for the modeling of seismically-induced ground motion response within small-scale basins.
GEOSCAN ID301664