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  <front>
    <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 pub-id-type="doi">10.31897/PMI.2022.47</article-id>
      <article-id custom-type="pmi" pub-id-type="custom">pmi-15776</article-id>
      <article-id pub-id-type="uri">https://pmi.spmi.ru/pmi/article/view/15776</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">Gold in biogenic apatites of the Baltic-Ladoga phosphorite basin</article-title>
        <trans-title-group xml:lang="ru">
          <trans-title>Золото в биогенных апатитах  Прибалтийско-Ладожского фосфоритоносного бассейна</trans-title>
        </trans-title-group>
      </title-group>
      <contrib-group>
        <contrib contrib-type="author" corresp="yes">
          <name name-style="eastern">
            <surname>Felitsyn</surname>
            <given-names>Sergey B.</given-names>
          </name>
          <name-alternatives>
            <name name-style="eastern" xml:lang="ru">
              <surname>Фелицын</surname>
              <given-names>C. Б.</given-names>
            </name>
            <name name-style="western" xml:lang="en">
              <surname>Felitsyn</surname>
              <given-names>Sergey B.</given-names>
            </name>
          </name-alternatives>
          <email>felitsynsergey@gmail.com</email>
          <contrib-id contrib-id-type="orcid">0000-0003-4168-5176</contrib-id>
          <xref ref-type="aff" rid="aff1"/>
        </contrib>
        <aff-alternatives id="aff1">
          <aff>
            <institution xml:lang="ru">Институт геологии и геохронологии докембрия РАН (Россия)</institution>
          </aff>
          <aff>
            <institution xml:lang="en">Institute of Precambrian Geology and Geochronology, Russian Academy of Sciences (Russia)</institution>
          </aff>
        </aff-alternatives>
        <contrib contrib-type="author">
          <name name-style="eastern">
            <surname>Alfimova</surname>
            <given-names>Nadezhda A.</given-names>
          </name>
          <name-alternatives>
            <name name-style="eastern" xml:lang="ru">
              <surname>Алфимова</surname>
              <given-names>Н. А.</given-names>
            </name>
            <name name-style="western" xml:lang="en">
              <surname>Alfimova</surname>
              <given-names>Nadezhda A.</given-names>
            </name>
          </name-alternatives>
          <email>felitsynsergey@gmail.com</email>
          <contrib-id contrib-id-type="orcid">0000-0003-4168-5176</contrib-id>
          <xref ref-type="aff" rid="aff2"/>
        </contrib>
        <aff-alternatives id="aff2">
          <aff>
            <institution xml:lang="ru">Институт геологии и геохронологии докембрия РАН (Россия)</institution>
          </aff>
          <aff>
            <institution xml:lang="en">Institute of Precambrian Geology and Geochronology, Russian Academy of Sciences (Russia)</institution>
          </aff>
        </aff-alternatives>
      </contrib-group>
      <pub-date pub-type="epub" iso-8601-date="2022-07-26">
        <day>26</day>
        <month>07</month>
        <year>2022</year>
      </pub-date>
      <pub-date date-type="collection">
        <year>2022</year>
      </pub-date>
      <volume>255</volume>
      <fpage>470</fpage>
      <lpage>475</lpage>
      <history>
        <date date-type="received" iso-8601-date="2022-03-22">
          <day>22</day>
          <month>03</month>
          <year>2022</year>
        </date>
        <date date-type="accepted" iso-8601-date="2022-06-15">
          <day>15</day>
          <month>06</month>
          <year>2022</year>
        </date>
        <date date-type="rev-recd" iso-8601-date="2022-07-26">
          <day>26</day>
          <month>07</month>
          <year>2022</year>
        </date>
      </history>
      <permissions>
        <copyright-statement xml:lang="ru">© 2022 C. Б. Фелицын, Н. А. Алфимова</copyright-statement>
        <copyright-statement xml:lang="en">© 2022 Sergey B. Felitsyn, Nadezhda A. Alfimova</copyright-statement>
        <copyright-year>2022</copyright-year>
        <copyright-holder xml:lang="ru">C. Б. Фелицын, Н. А. Алфимова</copyright-holder>
        <copyright-holder xml:lang="en">Sergey B. Felitsyn, Nadezhda A. Alfimova</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/15776">https://pmi.spmi.ru/pmi/article/view/15776</self-uri>
      <abstract xml:lang="ru">
        <p>Распределение содержания золота в биогенных апатитах из отложений ордовика на северо-западе Восточно-Европейской платформы показало, что максимальная концентрация золота в апатитах обнаружена в пределах Ладожско-Балтийской шовной зоны. Золотая минерализация имеет наложенный характер, что подтверждается связью содержания золота с размером частиц апатита и рядом изотопно-геохимических систематик в биогенных апатитах. Золото присутствует в виде частиц высокой пробности размером до 20 мкм на поверхности фрагментов биогенного апатита (раковины фосфатных брахиопод и конодонтовые элементы) и легко экстрагируется. В 10 % проб биогенных апатитов суммарное содержание редкоземельных элементов составляет более 1 мас.%</p>
      </abstract>
      <abstract xml:lang="en">
        <p>The distribution of gold in biogenic apatites from the Ordovician deposits in the northwest of the East European Platform shows that the maximum concentration of gold in apatites is found within the Ladoga-Baltic suture zone. Gold mineralization has a superimposed character, which is confirmed by the dependence of the gold content on the size of apatite particles and a number of isotope geochemical systematics in biogenic apatites. Gold is present in the form of high fineness particles to 20 µm in size on the surface of biogenic apatite fragments (phosphate brachiopod shells and conodont elements) and is easily extracted. In 10 % of samples of biogenic apatites, the total content of rare earth elements is more than 1 wt.%.</p>
      </abstract>
      <kwd-group xml:lang="ru">
        <title>Ключевые слова</title>
        <kwd>биогенные апатиты</kwd>
        <kwd>Балтийско-Ладожский фосфоритоносный бассейн</kwd>
        <kwd>ордовик</kwd>
        <kwd>золото</kwd>
        <kwd>изотопные систематики</kwd>
      </kwd-group>
      <kwd-group xml:lang="en">
        <title>Keywords</title>
        <kwd>biogenic apatites</kwd>
        <kwd>Baltic-Ladoga phosphorite basin</kwd>
        <kwd>Ordovician</kwd>
        <kwd>gold</kwd>
        <kwd>isotopic systematics</kwd>
      </kwd-group>
    </article-meta>
  </front>
  <body/>
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