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      <marc:subfield code="a">Crow, H. L., </marc:subfield>
      <marc:subfield code="e">author.</marc:subfield>
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    <marc:datafield tag="245" ind1="1" ind2="0">
      <marc:subfield code="a">New core and downhole geophysical data sets from the Bells Corners Borehole Calibration Facility, Ottawa, Ontario / </marc:subfield>
      <marc:subfield code="c">H.L. Crow, K.D. Brewer, T.J. Cartwright, S. Gaines, D. Heagle, A.J.-M. Pugin, H.A.J. Russell.</marc:subfield>
    </marc:datafield>
    <marc:datafield tag="264" ind1=" " ind2="1">
      <marc:subfield code="a">[Ottawa] : </marc:subfield>
      <marc:subfield code="b">Geological Survey of Canada, </marc:subfield>
      <marc:subfield code="c">2021.</marc:subfield>
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    <marc:datafield tag="264" ind1=" " ind2="4">
      <marc:subfield code="c">©2021</marc:subfield>
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    <marc:datafield tag="300" ind1=" " ind2=" ">
      <marc:subfield code="a">1 online resource (36 pages) : </marc:subfield>
      <marc:subfield code="b">colour illustrations, colour maps + </marc:subfield>
      <marc:subfield code="e">5 sets of test data and results.</marc:subfield>
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      <marc:subfield code="a">text</marc:subfield>
      <marc:subfield code="b">txt</marc:subfield>
      <marc:subfield code="2">rdacontent</marc:subfield>
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      <marc:subfield code="a">computer</marc:subfield>
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      <marc:subfield code="a">online resource</marc:subfield>
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      <marc:subfield code="a">Open file, </marc:subfield>
      <marc:subfield code="x">2816-7155 ; </marc:subfield>
      <marc:subfield code="v">8811</marc:subfield>
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    <marc:datafield tag="504" ind1=" " ind2=" ">
      <marc:subfield code="a">Includes bibliographical references (pages 34-36).</marc:subfield>
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    <marc:datafield tag="520" ind1="3" ind2=" ">
      <marc:subfield code="a">"The Geological Survey of Canada's deep borehole test site at the Bells Corners Borehole Calibration Facility in Ottawa, Ontario, has been in use since the 1980's for the development and calibration of geophysical logging instrumentation. Cores from six deep boreholes (up to 300 m) are preserved and remain available for research purposes. In 2019, the facility underwent repairs to reopen deep boreholes, replace surface casings, and install atmospheric monitoring equipment. This report documents new laboratory core testing and downhole geophysical logs collected in borehole BC81-2, the most frequently logged of the boreholes at the facility. Core data sets include physical, mechanical, and hydraulic properties, nuclear magnetic resonance, and complex resistivity measurements. The downhole log suite includes televiewer imagery (optical and acoustic), total gamma, full waveform sonic, and fluid measurements (high resolution temperature, conductivity, and flow meter measurements). Digital data are provided in appendices. These data sets support ongoing collaborations at the Facility across a variety of disciplines for geological exploration, geoengineering, and hydrogeological research"--Abstract, page 1.</marc:subfield>
    </marc:datafield>
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      <marc:subfield code="a">Geophysical well logging</marc:subfield>
      <marc:subfield code="z">Ontario</marc:subfield>
      <marc:subfield code="z">Ottawa.</marc:subfield>
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      <marc:subfield code="a">Drill core analysis.</marc:subfield>
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    <marc:datafield tag="650" ind1=" " ind2="6">
      <marc:subfield code="a">Diagraphies géophysiques</marc:subfield>
      <marc:subfield code="z">Ontario</marc:subfield>
      <marc:subfield code="z">Ottawa.</marc:subfield>
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    <marc:datafield tag="650" ind1=" " ind2="6">
      <marc:subfield code="a">Analyse de carottes de sondage.</marc:subfield>
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      <marc:subfield code="a">Geological Survey of Canada, </marc:subfield>
      <marc:subfield code="e">issuing body.</marc:subfield>
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      <marc:subfield code="a">Open file (Geological Survey of Canada)</marc:subfield>
      <marc:subfield code="v">8811.</marc:subfield>
      <marc:subfield code="w">(CaOODSP)9.506878</marc:subfield>
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      <marc:subfield code="q">PDF</marc:subfield>
      <marc:subfield code="s">9.28 MB</marc:subfield>
      <marc:subfield code="u">https://publications.gc.ca/collections/collection_2023/rncan-nrcan/m183-2/M183-2-8811-eng.pdf</marc:subfield>
      <marc:subfield code="z">(report)</marc:subfield>
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      <marc:subfield code="q">PDF</marc:subfield>
      <marc:subfield code="s">134 KB</marc:subfield>
      <marc:subfield code="u">https://publications.gc.ca/collections/collection_2023/rncan-nrcan/m183-2/M183-2-8811-1-eng.pdf</marc:subfield>
      <marc:subfield code="z">(Attachment A - Summary of test results)</marc:subfield>
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      <marc:subfield code="q">PDF</marc:subfield>
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      <marc:subfield code="u">https://publications.gc.ca/collections/collection_2023/rncan-nrcan/m183-2/M183-2-8811-2-eng.pdf</marc:subfield>
      <marc:subfield code="z">(Attachment B - Compression test data)</marc:subfield>
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      <marc:subfield code="q">PDF</marc:subfield>
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      <marc:subfield code="u">https://publications.gc.ca/collections/collection_2023/rncan-nrcan/m183-2/M183-2-8811-3-eng.pdf</marc:subfield>
      <marc:subfield code="z">(Attachment C - Photographs of UCS and TCS test specimens)</marc:subfield>
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      <marc:subfield code="q">PDF</marc:subfield>
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      <marc:subfield code="u">https://publications.gc.ca/collections/collection_2023/rncan-nrcan/m183-2/M183-2-8811-4-eng.pdf</marc:subfield>
      <marc:subfield code="z">(Attachment D - Photographs of Brazilian test specimens)</marc:subfield>
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      <marc:subfield code="q">PDF</marc:subfield>
      <marc:subfield code="s">689 KB</marc:subfield>
      <marc:subfield code="u">https://publications.gc.ca/collections/collection_2023/rncan-nrcan/m183-2/M183-2-8811-5-eng.pdf</marc:subfield>
      <marc:subfield code="z">(Attachment E - Axial permeability tests)</marc:subfield>
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      <marc:subfield code="u">https://doi.org/10.4095/328837</marc:subfield>
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