<?xml version="1.0" encoding="UTF-8"?><marc:collection xmlns:marc="http://www.loc.gov/MARC21/slim">
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      <marc:subfield code="a">eng</marc:subfield>
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      <marc:subfield code="a">M38-13/85-12E-PDF</marc:subfield>
      <marc:subfield code="z">M38-13/85-12E</marc:subfield>
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    <marc:datafield tag="100" ind1="1" ind2=" ">
      <marc:subfield code="a">Petruk, W., </marc:subfield>
      <marc:subfield code="d">1930-</marc:subfield>
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    <marc:datafield tag="245" ind1="1" ind2="0">
      <marc:subfield code="a">Recent developments in process mineralogy of complex sulphide ores </marc:subfield>
      <marc:subfield code="h">[electronic resource] / </marc:subfield>
      <marc:subfield code="c">W. Petruk and P.R. Mainwaring, Mineral Processing Laboratory.</marc:subfield>
    </marc:datafield>
    <marc:datafield tag="260" ind1=" " ind2=" ">
      <marc:subfield code="a">Ottawa : </marc:subfield>
      <marc:subfield code="b">Minerals Research Program, Mineral Sciences Laboratories, </marc:subfield>
      <marc:subfield code="c">1985, c1986.</marc:subfield>
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      <marc:subfield code="a">v, 12 p. : </marc:subfield>
      <marc:subfield code="b">ill., graphs, photographs</marc:subfield>
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      <marc:subfield code="a">CANMET report ; </marc:subfield>
      <marc:subfield code="v">85-12E</marc:subfield>
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    <marc:datafield tag="500" ind1=" " ind2=" ">
      <marc:subfield code="a">"October 1985."</marc:subfield>
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    <marc:datafield tag="500" ind1=" " ind2=" ">
      <marc:subfield code="a">Title from cover.</marc:subfield>
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    <marc:datafield tag="500" ind1=" " ind2=" ">
      <marc:subfield code="a">Issued also in French under title: Développements récents en matière d'études minéralogiques du traitement des minerais sulfurés complexes.</marc:subfield>
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    <marc:datafield tag="504" ind1=" " ind2=" ">
      <marc:subfield code="a">Includes bibliographical references.</marc:subfield>
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    <marc:datafield tag="520" ind1=" " ind2=" ">
      <marc:subfield code="a">"The term "complex sulphide ores" generally refers to the relatively finegrained, pyritic, polymetallic base-metal ores of volcanogenic origin. The metals of economic value in these ores are copper, zinc, lead, silver, gold, tin, cadmium, indium, selenium, and tellurium. The metals occur principally as constituents of the minerals chalcopyrite, sphalerite, galena, tetrahedrite, cassiterite, electrum, and many sulphosalts. The metal-bearing minerals are recovered by flotation in copper, lead, and zinc concentrates, which are then smelted and refined to recover the metals. Process mineralogy provides fundamental information for designing mineral beneficiation, extraction metallurgy, pyrometallurgy, and other plants for treating the ore, concentrates, and other products. Recent developments of equipment such as the automatic SEM-IPS-IAS image analysis system have made it possible to perform rapid quantitative analysis of mineralogical characteristics that affect processing. Previously, these analyses could only be determined qualitatively or not at all. The analyses have provided a better understanding of the behaviour of minerals and phases during processing, leading to improved metal recoveries at processing plants"--Abstract, p. i.</marc:subfield>
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      <marc:subfield code="a">Includes abstract in French.</marc:subfield>
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      <marc:subfield code="2">gccst</marc:subfield>
      <marc:subfield code="a">Minerals</marc:subfield>
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      <marc:subfield code="2">gccst</marc:subfield>
      <marc:subfield code="a">Research and development</marc:subfield>
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      <marc:subfield code="2">gccst</marc:subfield>
      <marc:subfield code="a">Processing</marc:subfield>
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      <marc:subfield code="a">Mainwaring, Paul Richard, </marc:subfield>
      <marc:subfield code="d">1945-</marc:subfield>
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    <marc:datafield tag="710" ind1="1" ind2=" ">
      <marc:subfield code="a">Canada. </marc:subfield>
      <marc:subfield code="b">Natural Resources Canada.</marc:subfield>
    </marc:datafield>
    <marc:datafield tag="710" ind1="2" ind2=" ">
      <marc:subfield code="a">Canada Centre for Mineral and Energy Technology.</marc:subfield>
    </marc:datafield>
    <marc:datafield tag="710" ind1="2" ind2=" ">
      <marc:subfield code="a">Mineral Processing Laboratory (Canada)</marc:subfield>
    </marc:datafield>
    <marc:datafield tag="710" ind1="2" ind2=" ">
      <marc:subfield code="a">Minerals Research Program (Canada)</marc:subfield>
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      <marc:subfield code="a">Mineral Sciences Laboratories (Canada)</marc:subfield>
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    <marc:datafield tag="775" ind1="0" ind2="8">
      <marc:subfield code="t">Développements récents en matière d'études minéralogiques du traitement des minerais sulfurés complexes </marc:subfield>
      <marc:subfield code="w">(CaOODSP)9.866589</marc:subfield>
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      <marc:subfield code="a">CANMET report ;</marc:subfield>
      <marc:subfield code="v">85-12E.</marc:subfield>
      <marc:subfield code="w">(CaOODSP)9.852792</marc:subfield>
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      <marc:subfield code="q">PDF</marc:subfield>
      <marc:subfield code="s">995 KB</marc:subfield>
      <marc:subfield code="u">https://publications.gc.ca/collections/collection_2019/rncan-nrcan/m38-13/M38-13-85-12-eng.pdf</marc:subfield>
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