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      <marc:subfield code="a">Geological Survey of Canada.</marc:subfield>
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      <marc:subfield code="a">Geological classification of Canadian gold deposits / </marc:subfield>
      <marc:subfield code="c">by K. H. Poulsen, F. Robert and B. Dubé. </marc:subfield>
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      <marc:subfield code="a">Ottawa - Ontario : </marc:subfield>
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      <marc:subfield code="a">"This paper proposes a geological classification of lode gold deposits, based largely on the nature of the ore and on the geological settings of the deposits. Sixteen common types of bedrock gold deposits are distinguished and their main geological attributes summarized."--Abstract.</marc:subfield>
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      <marc:subfield code="a">Classifications of ore deposits provide essential frameworks for designing exploration strategies, evaluating prospects, and performing resource assessments of selected areas. This paper proposes a geological classification of lode gold deposits, based largely on the nature of the ore and on the geological settings of the deposits. Sixteen common types of bedrock gold deposits are distinguished and their main geological attributes summarized. They do not correspond to an equal number of genetic types: many of these deposit types represent different components of larger hydrothermal systems and are genetically related.</marc:subfield>
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      <marc:subfield code="a">Résumés en français</marc:subfield>
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      <marc:subfield code="a">Gold</marc:subfield>
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      <marc:subfield code="a">Geology</marc:subfield>
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      <marc:subfield code="a">Classification</marc:subfield>
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      <marc:subfield code="a">Dubé, B.</marc:subfield>
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      <marc:subfield code="a">Poulsen, K. H.</marc:subfield>
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      <marc:subfield code="a">Robert, F.</marc:subfield>
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      <marc:subfield code="t">Geological classification of Canadian gold deposits </marc:subfield>
      <marc:subfield code="w">(CaOODSP)9.619118</marc:subfield>
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      <marc:subfield code="t">Geological classification of Canadian gold deposits </marc:subfield>
      <marc:subfield code="w">(CaOODSP)9.817750</marc:subfield>
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      <marc:subfield code="a">Bulletin,</marc:subfield>
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      <marc:subfield code="v">540</marc:subfield>
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