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      <marc:subfield code="a">Plourde, A. P. </marc:subfield>
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      <marc:subfield code="a">Portable XRF spectrometry of surficial sediments, NTS 75-I, 75-J, 75-O, 75-P (Mary Frances Lake – Whitefish Lake – Thelon River area), Northwest Territories / </marc:subfield>
      <marc:subfield code="c">A.P. Plourde, R.D. Knight, B.A. Kjarsgaard, D.R. Sharpe, J-E. Lesemann.</marc:subfield>
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      <marc:subfield code="a">Includes bibliographical references (pages 21-23).</marc:subfield>
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      <marc:subfield code="a">"This report presents elemental concentrations, determined by pXRF spectrometry, of surficial sediment diamicton (till) and esker (sand) samples, collected in summer 2012. The study area encompasses parts of NTS map sheets 75-I, 75-J, 75-O, and 75-P; it covers approximately 3500 km2, lying southwest of the Thelon Wildlife Sanctuary, and east of the area of interest for Thaidene Nene"--Introduction, page 1.</marc:subfield>
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