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    <journal-meta>
      <journal-id journal-id-type="issn">2411-3336</journal-id>
      <journal-id journal-id-type="eissn">2541-9404</journal-id>
      <journal-title-group>
        <journal-title xml:lang="ru">Записки Горного института</journal-title>
        <journal-title xml:lang="en">Journal of Mining Institute</journal-title>
      </journal-title-group>
      <publisher>
        <publisher-name xml:lang="ru">Санкт-Петербургский горный университет императрицы Екатерины ΙΙ</publisher-name>
        <publisher-name xml:lang="en">Empress Catherine II Saint Petersburg Mining University</publisher-name>
      </publisher>
    </journal-meta>
    <article-meta>
      <article-id custom-type="edn" pub-id-type="custom">NIPPTK</article-id>
      <article-id custom-type="pmi" pub-id-type="custom">pmi-16812</article-id>
      <article-id pub-id-type="uri">https://pmi.spmi.ru/pmi/article/view/16812</article-id>
      <article-categories>
        <subj-group subj-group-type="section-heading" xml:lang="ru">
          <subject>Геология</subject>
        </subj-group>
        <subj-group subj-group-type="section-heading" xml:lang="en">
          <subject>Geology</subject>
        </subj-group>
      </article-categories>
      <title-group>
        <article-title xml:lang="en">Morphological features, internal structure, and compositional signatures of native gold from the Murzinka placer group (Middle Urals): identification of lode sources and conditions of placer formation</article-title>
        <trans-title-group xml:lang="ru">
          <trans-title>Особенности морфологии, внутреннего строения и состава самородного золота Мурзинской группы россыпей (Средний Урал): определения коренных источников и условий формирования россыпей золота</trans-title>
        </trans-title-group>
      </title-group>
      <contrib-group>
        <contrib contrib-type="author" corresp="yes">
          <name name-style="eastern">
            <surname>Kozin</surname>
            <given-names>Aleksandr K.</given-names>
          </name>
          <name-alternatives>
            <name name-style="eastern" xml:lang="ru">
              <surname>Козин</surname>
              <given-names>А. К.</given-names>
            </name>
            <name name-style="western" xml:lang="en">
              <surname>Kozin</surname>
              <given-names>Aleksandr K.</given-names>
            </name>
          </name-alternatives>
          <email>kozin@mineralogy.ru</email>
          <contrib-id contrib-id-type="orcid">0009-0004-8197-4284</contrib-id>
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        </contrib>
        <aff-alternatives id="aff1">
          <aff>
            <institution xml:lang="ru">Южно-Уральский федеральный научный центр минералогии и геоэкологии УрО РАН (Миасс, Россия)</institution>
          </aff>
          <aff>
            <institution xml:lang="en">South Ural Scientific Centre Mineralogy and Environmental Geology of the Ural branch RAS (Miass, Russia)</institution>
          </aff>
        </aff-alternatives>
        <contrib contrib-type="author">
          <name name-style="eastern">
            <surname>Stepanov</surname>
            <given-names>Sergei Yu.</given-names>
          </name>
          <name-alternatives>
            <name name-style="eastern" xml:lang="ru">
              <surname>Степанов</surname>
              <given-names>С. Ю.</given-names>
            </name>
            <name name-style="western" xml:lang="en">
              <surname>Stepanov</surname>
              <given-names>Sergei Yu.</given-names>
            </name>
          </name-alternatives>
          <email>stepanov-1@yandex.ru</email>
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        </contrib>
        <aff-alternatives id="aff2">
          <aff>
            <institution xml:lang="ru">Южно-Уральский федеральный научный центр минералогии и геоэкологии УрО РАН (Миасс, Россия)</institution>
          </aff>
          <aff>
            <institution xml:lang="en">South Ural Scientific Centre Mineralogy and Environmental Geology of the Ural branch RAS (Miass, Russia)</institution>
          </aff>
        </aff-alternatives>
        <contrib contrib-type="author">
          <name name-style="eastern">
            <surname>Palamarchuk</surname>
            <given-names>Roman S.</given-names>
          </name>
          <name-alternatives>
            <name name-style="eastern" xml:lang="ru">
              <surname>Паламарчук</surname>
              <given-names>Р. С.</given-names>
            </name>
            <name name-style="western" xml:lang="en">
              <surname>Palamarchuk</surname>
              <given-names>Roman S.</given-names>
            </name>
          </name-alternatives>
          <email>palamarchuk22@yandex.ru</email>
          <contrib-id contrib-id-type="orcid">0000-0001-5422-2627</contrib-id>
          <xref ref-type="aff" rid="aff3"/>
        </contrib>
        <aff-alternatives id="aff3">
          <aff>
            <institution xml:lang="ru">Южно-Уральский федеральный научный центр минералогии и геоэкологии УрО РАН (Миасс, Россия)</institution>
          </aff>
          <aff>
            <institution xml:lang="en">South Ural Scientific Centre Mineralogy and Environmental Geology of the Ural branch RAS (Miass, Russia)</institution>
          </aff>
        </aff-alternatives>
        <contrib contrib-type="author">
          <name name-style="eastern">
            <surname>Zhdanova</surname>
            <given-names>Valeriya S.</given-names>
          </name>
          <name-alternatives>
            <name name-style="eastern" xml:lang="ru">
              <surname>Жданова</surname>
              <given-names>В. С.</given-names>
            </name>
            <name name-style="western" xml:lang="en">
              <surname>Zhdanova</surname>
              <given-names>Valeriya S.</given-names>
            </name>
          </name-alternatives>
          <email>zhdanova_v@ugdm.tech</email>
          <contrib-id contrib-id-type="orcid">0009-0000-6895-6170</contrib-id>
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        </contrib>
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          <aff>
            <institution xml:lang="ru">Южно-Уральский  федеральный научный центр минералогии и геоэкологии УрО РАН (Миасс, Россия)</institution>
          </aff>
          <aff>
            <institution xml:lang="en">South Ural Scientific Centre Mineralogy and Environmental Geology of the Ural branch RAS (Miass, Russia)</institution>
          </aff>
        </aff-alternatives>
        <contrib contrib-type="author">
          <name name-style="eastern">
            <surname>Vlasenko</surname>
            <given-names>Natalya S.</given-names>
          </name>
          <name-alternatives>
            <name name-style="eastern" xml:lang="ru">
              <surname>Власенко</surname>
              <given-names>Н. С.</given-names>
            </name>
            <name name-style="western" xml:lang="en">
              <surname>Vlasenko</surname>
              <given-names>Natalya S.</given-names>
            </name>
          </name-alternatives>
          <email>n.vlasenko@spbu.ru</email>
          <contrib-id contrib-id-type="orcid">0000-0002-5548-9478</contrib-id>
          <xref ref-type="aff" rid="aff5"/>
        </contrib>
        <aff-alternatives id="aff5">
          <aff>
            <institution xml:lang="ru">Санкт-Петербургский государственный университет (Санкт-Петербург, Россия)</institution>
          </aff>
          <aff>
            <institution xml:lang="en">Saint Petersburg State University (Saint Petersburg, Russia)</institution>
          </aff>
        </aff-alternatives>
      </contrib-group>
      <pub-date pub-type="epub" iso-8601-date="2026-07-27">
        <day>27</day>
        <month>07</month>
        <year>2026</year>
      </pub-date>
      <pub-date date-type="collection">
        <year>2026</year>
      </pub-date>
      <volume>280</volume>
      <fpage>104</fpage>
      <lpage>121</lpage>
      <history>
        <date date-type="received" iso-8601-date="2025-09-11">
          <day>11</day>
          <month>09</month>
          <year>2025</year>
        </date>
        <date date-type="accepted" iso-8601-date="2026-04-28">
          <day>28</day>
          <month>04</month>
          <year>2026</year>
        </date>
        <date date-type="rev-recd" iso-8601-date="2026-08-31">
          <day>31</day>
          <month>08</month>
          <year>2026</year>
        </date>
      </history>
      <permissions>
        <copyright-statement xml:lang="ru">© 2026 А. К. Козин, С. Ю. Степанов, Р. С. Паламарчук, В. С. Жданова, Н. С. Власенко</copyright-statement>
        <copyright-statement xml:lang="en">© 2026 Aleksandr K. Kozin, Sergei Yu. Stepanov, Roman S. Palamarchuk, Valeriya S. Zhdanova, Natalya S. Vlasenko</copyright-statement>
        <copyright-year>2026</copyright-year>
        <copyright-holder xml:lang="ru">А. К. Козин, С. Ю. Степанов, Р. С. Паламарчук, В. С. Жданова, Н. С. Власенко</copyright-holder>
        <copyright-holder xml:lang="en">Aleksandr K. Kozin, Sergei Yu. Stepanov, Roman S. Palamarchuk, Valeriya S. Zhdanova, Natalya S. Vlasenko</copyright-holder>
        <license license-type="open-access" xlink:href="http://creativecommons.org/licenses/by/4.0" xml:lang="ru">
          <license-p>Эта статья доступна по лицензии Creative Commons Attribution 4.0 International (CC BY 4.0)</license-p>
        </license>
        <license license-type="open-access" xlink:href="http://creativecommons.org/licenses/by/4.0" xml:lang="en">
          <license-p>This article is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0)</license-p>
        </license>
      </permissions>
      <self-uri xlink:type="simple" xlink:href="https://pmi.spmi.ru/pmi/article/view/16812">https://pmi.spmi.ru/pmi/article/view/16812</self-uri>
      <abstract xml:lang="ru">
        <p>Представлены результаты комплексного исследования самородного золота из девяти россыпей Мурзинской группы на Среднем Урале. Детально охарактеризованы морфологические признаки, химический состав и внутреннее строение самородного золота, а также минеральных включений в нем. На основе анализа морфологических особенностей и степени окатанности золотин установлено близкое расположение коренных источников золота (от сотен метров до первых километров). По результатам исследования химического состава и минеральных включений выделены три типа самородного золота. Тип I (преобладающий) характеризуется высокой пробой с примесями Ag и Hg, включениями пирита, халькопирита, галенита, молибденита и петцита. Количество примесей в самородном золоте этого типа позволяет выделить подтипы, распространие которых в россыпях отражает зональность коренной минерализации золотокварцевого типа. Тип II отличается повышенными содержаниями меди, включениями борнита; тип III – высокими содержаниями Ag. Определены коренные источники разных типов золота: для типа I – золотокварцевая формация, для типа II – благороднометалльная минерализация в габброидах Павдинского массива. Применение метода дифракции обратнорассеянных электронов (EBSD) позволило детально охарактеризовать внутреннее строение золотин. Обнаруженные высокопробные межзерновые прожилки и срастания золота с минералами группы рабдофана позволили прийти к заключению о нахождении самородного золота в зоне гипергенеза в период активного развития кор выветривания в верхнем мезозое и палеогене. Установлено, что формирование россыпной системы в бассейне р. Мурзинка происходило в неоген-четвертичное время преимущественно за счет коренной минерализации золотокварцевого типа. Полученные данные позволяют локализовать перспективные участки для поиска коренных золоторудных объектов и расширяют представления о металлогеническом потенциале региона.</p>
      </abstract>
      <abstract xml:lang="en">
        <p>The paper presents the results of a complex study of native gold from nine placers of the Murzinka group in the Middle Urals. Morphological features, chemical composition, and internal structure of native gold, as well as mineral inclusions within it, are described in detail. Based on the analysis of morphological characteristics and the gold particles rounding degree, the proximity of lode gold sources is inferred ranging from several hundred meters to the first few kilometers. Three types of native gold were identified according to the chemical composition and mineral inclusions. Type I (the predominant type) is characterized by high fineness with Ag and Hg admixture and inclusions of pyrite, chalcopyrite, galena, molybdenite, and petzite. The variation in admixture content within this type allows the definition of subtypes; their distribution in placers reflects the zoning of lode quartz gold mineralization. Type II is distinguished by elevated copper contents and bornite inclusions; Type III is defined by high Ag contents. Lode sources for the different gold types have been identified: for Type I, a quartz gold lode deposits; for Type II, precious metal mineralization in the gabbroids of the Pavdinsky massif. Application of the electron backscatter diffraction (EBSD) technique enabled a detailed characterization of the internal structure of gold particles. The observed high fineness intergranular veins and intergrowths of gold with minerals of the rhabdophane group suggest that native gold was located in the supergene zone during the period of active weathering crust development in the Upper Mesozoic and Palaeogene. It is established that the placer system in the Murzinka River basin formed during the Neogene-Quaternary period, primarily due to lode quartz gold mineralization. The obtained data allow the localization of prospective areas for the exploration of lode gold deposits and expand the understanding of the region’s metallogenic potential.</p>
      </abstract>
      <kwd-group xml:lang="ru">
        <title>Ключевые слова</title>
        <kwd>самородное золото</kwd>
        <kwd>медистое золото</kwd>
        <kwd>россыпное золото</kwd>
        <kwd>россыпи</kwd>
        <kwd>коры выветривания</kwd>
        <kwd>рабдофан</kwd>
        <kwd>внутренние структуры</kwd>
        <kwd>EBSD</kwd>
        <kwd>Средний Урал</kwd>
      </kwd-group>
      <kwd-group xml:lang="en">
        <title>Keywords</title>
        <kwd>native gold</kwd>
        <kwd>copper-bearing gold</kwd>
        <kwd>placer gold</kwd>
        <kwd>placer</kwd>
        <kwd>weathering crust</kwd>
        <kwd>rhabdophane</kwd>
        <kwd>internal structure</kwd>
        <kwd>EBSD</kwd>
        <kwd>Middle Urals</kwd>
      </kwd-group>
      <funding-group>
        <funding-statement xml:lang="ru">Исследования выполнены в рамках научной темы ЮУ ФНЦ МиГ УрО РАН № FUUR-2025-0007.</funding-statement>
        <funding-statement xml:lang="en">The study conducted under research topic of the SUSC MEG UbRAS N FUUR-2025-0007.</funding-statement>
      </funding-group>
    </article-meta>
  </front>
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