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    <marc:controlfield tag="003">CaOODSP</marc:controlfield>
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    <marc:controlfield tag="006">m    go  c f      </marc:controlfield>
    <marc:controlfield tag="007">cr |||||||||||</marc:controlfield>
    <marc:controlfield tag="008">180827s1983    onc    bh a  fo 0   eng d</marc:controlfield>
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      <marc:subfield code="a">M183-2/936E-PDF</marc:subfield>
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      <marc:subfield code="a">[Aeromagnetic gradiometer maps, Lynn Lake, Manitoba] </marc:subfield>
      <marc:subfield code="h">[electronic resource].</marc:subfield>
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      <marc:subfield code="a">Lynn Lake Man.</marc:subfield>
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      <marc:subfield code="a">Manitoba total magentic field</marc:subfield>
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      <marc:subfield code="a">Scale 1:20,000 ; </marc:subfield>
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      <marc:subfield code="c">(W 101°50’--W 100°50'/N 57°00'--N 56°50’)</marc:subfield>
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      <marc:subfield code="a">Scale 1:50,000 </marc:subfield>
      <marc:subfield code="c">(W 101°50’--W 100°50'/N 57°00'--N 56°50’)</marc:subfield>
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    <marc:datafield tag="260" ind1=" " ind2=" ">
      <marc:subfield code="a">Ottawa : </marc:subfield>
      <marc:subfield code="b">Department of Energy, Mines and Resources : </marc:subfield>
      <marc:subfield code="b">Geological Survey of Canada, </marc:subfield>
      <marc:subfield code="c">1983.</marc:subfield>
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      <marc:subfield code="a">10 maps</marc:subfield>
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      <marc:subfield code="a">Open file ; </marc:subfield>
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      <marc:subfield code="a">Title from GEOSCAN.</marc:subfield>
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      <marc:subfield code="a">"This document was produced by scanning the original publication."</marc:subfield>
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    <marc:datafield tag="520" ind1=" " ind2=" ">
      <marc:subfield code="a">"The residual total field values were calculated from the vertical gradient data. This method was required because of severe diurnal conditions which greatly affected the measured total field. The digitally recorded survey was obtained by two self-orienting cesium vapour magnetometers installed in twin tail booms mounted on the CSC Beechcraft B80 aircraft. The magnetometers are vertically separated by a distance of 2.05 metres with each measuring the total magentic field to a resolution of 0.005 gammas."</marc:subfield>
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      <marc:subfield code="2">gccst</marc:subfield>
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      <marc:subfield code="2">gccst</marc:subfield>
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      <marc:subfield code="2">gccst</marc:subfield>
      <marc:subfield code="a">Lakes</marc:subfield>
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      <marc:subfield code="a">Canada. </marc:subfield>
      <marc:subfield code="b">Natural Resources Canada.</marc:subfield>
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      <marc:subfield code="a">Canada. </marc:subfield>
      <marc:subfield code="b">Department of Energy, Mines and Resources.</marc:subfield>
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      <marc:subfield code="a">Geological Survey of Canada.</marc:subfield>
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      <marc:subfield code="a">Open file (Geological Survey of Canada)</marc:subfield>
      <marc:subfield code="v">936.</marc:subfield>
      <marc:subfield code="w">(CaOODSP)9.832719</marc:subfield>
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      <marc:subfield code="q">PDF</marc:subfield>
      <marc:subfield code="s">1.76 MB</marc:subfield>
      <marc:subfield code="u">https://publications.gc.ca/collections/collection_2018/rncan-nrcan/m183-2/M183-2-936-calculated-tf-1-2-eng.pdf</marc:subfield>
      <marc:subfield code="z">Calculated TF maps 1 + 2</marc:subfield>
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      <marc:subfield code="q">PDF</marc:subfield>
      <marc:subfield code="s">933 KB</marc:subfield>
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      <marc:subfield code="u">https://publications.gc.ca/collections/collection_2018/rncan-nrcan/m183-2/M183-2-936-vertical-gradient-1-2-eng.pdf</marc:subfield>
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      <marc:subfield code="u">https://doi.org/10.4095/129628</marc:subfield>
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