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TitleThe Bells Corner borehole geophysical calibration facility of the Geological Survey of Canada
DownloadDownload (whole publication)
LicencePlease note the adoption of the Open Government Licence - Canada supersedes any previous licences.
AuthorCrow, HORCID logo; Brewer, K; Cartwright, T; Dietiker, BORCID logo; Pugin, A J -M; Russell, H A JORCID logo
SourceRegional-scale groundwater geoscience in southern Ontario: an Ontario Geological Survey, Geological Survey of Canada, and Conservation Ontario geoscientists open house; by Russell, H A JORCID logo; Ford, D; Priebe, E H; Holysh, S; Geological Survey of Canada, Open File 8363, 2018 p. 11, Open Access logo Open Access
PublisherNatural Resources Canada
MeetingRegional-Scale Groundwater Geoscience in Southern Ontario: Open House; Guelph; CA; February 28 - March 1, 2018
Documentopen file
Mediaon-line; digital
RelatedThis publication is contained in Regional-scale groundwater geoscience in southern Ontario: an Ontario Geological Survey, Geological Survey of Canada, and Conservation Ontario geoscientists open house
File formatpdf
Lat/Long WENS -76.0000 -75.5000 45.5000 45.2500
Subjectsgeophysics; geophysical logging; boreholes; in-field instrumentation; Standardization
ProgramGroundwater Geoscience Aquifer Assessment & support to mapping
Released2018 02 16
AbstractCalibration sites provide important opportunities for the standardization of downhole instrument response. Using quantitative physical properties from borehole cores, calibration adds value to projects by allowing for data consistency from hole-to-hole, system-to-system, and importantly, over time. The Geological Survey of Canada (GSC) maintains the Bells Corners Calibration Facilities near Ottawa, Canada, which is available to all members of the geophysical logging community.
In the late 1970's and early 1980's, the GSC developed quantitative borehole calibration facilities, consisting of model calibration boreholes for gamma-ray spectral logging probes with known concentrations of potassium (K), uranium (U), and thorium (Th), density calibration blocks for gamma-gamma tools, and six deep boreholes in Palaeozoic sedimentary (sandstone, dolomite, shale) and Precambrian (granitic) bedrock. The deep boreholes were continuously cored, range in depth from 120 - 300 m, and are sited within a 10 to 100 m triangular configuration for cross-hole capabilities. The published downhole log suite includes spectral gamma-ray, density, neutron, induced polarization (IP), self potential (SP), resistivity, acoustic velocity, magnetic susceptibility, and fluid temperature. In recent years, new GSC calibration datasets have been collected in these wells including high-resolution televiewer imaging, acoustic velocities, and high-resolution temperature and fluid conductivity.
An effort is underway to update downhole and petrophysical core measurements, maintain standardization for traditional downhole instruments, and conduct demonstration projects with newly developed downhole instruments so that sites remain relevant to members of the groundwater, geotechnical, and extractive sectors.
Summary(Plain Language Summary, not published)
Proceedings for a workshop in Guelph Ontario as part of the program S&T exchange. Abstracts have been contributed by Ontario Geological Survey, Ministry of Environment and Climate Change, Conservation Authorities, Universities, private sector, and Unites States Geological Survey.

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