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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 custom-type="edn" pub-id-type="custom">AEBPRK</article-id>
      <article-id custom-type="pmi" pub-id-type="custom">pmi-16576</article-id>
      <article-id pub-id-type="uri">https://pmi.spmi.ru/pmi/article/view/16576</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">Reconstruction of the geodynamic history of the Marun-Keu complex, the Polar Urals: a multidisciplinary approach</article-title>
        <trans-title-group xml:lang="ru">
          <trans-title>Реконструкция геодинамической истории комплекса Марун-Кеу, Полярный Урал: мультидисциплинарный подход</trans-title>
        </trans-title-group>
      </title-group>
      <contrib-group>
        <contrib contrib-type="author">
          <name name-style="eastern">
            <surname>Berezin</surname>
            <given-names>Aleksei V.</given-names>
          </name>
          <name-alternatives>
            <name name-style="eastern" xml:lang="ru">
              <surname>Березин</surname>
              <given-names>А. В.</given-names>
            </name>
            <name name-style="western" xml:lang="en">
              <surname>Berezin</surname>
              <given-names>Aleksei V.</given-names>
            </name>
          </name-alternatives>
          <email>berezin-geo@yandex.ru</email>
          <contrib-id contrib-id-type="orcid">0000-0002-5324-5840</contrib-id>
          <xref ref-type="aff" rid="aff1"/>
        </contrib>
        <aff-alternatives id="aff1">
          <aff>
            <institution xml:lang="ru">Институт геологии и геохронологии докембрия РАН (Санкт-Петербург, Россия)</institution>
          </aff>
          <aff>
            <institution xml:lang="en">Institute of Precambrian Geology and Geochronology RAS (Saint Petersburg, Russia)</institution>
          </aff>
        </aff-alternatives>
        <contrib contrib-type="author" corresp="yes">
          <name name-style="eastern">
            <surname>Salimgaraeva</surname>
            <given-names>Laysan I.</given-names>
          </name>
          <name-alternatives>
            <name name-style="eastern" xml:lang="ru">
              <surname>Салимгараева</surname>
              <given-names>Л. И.</given-names>
            </name>
            <name name-style="western" xml:lang="en">
              <surname>Salimgaraeva</surname>
              <given-names>Laysan I.</given-names>
            </name>
          </name-alternatives>
          <email>fluoritecaf2@mail.ru</email>
          <contrib-id contrib-id-type="orcid">0000-0002-3285-847X</contrib-id>
          <xref ref-type="aff" rid="aff2"/>
        </contrib>
        <aff-alternatives id="aff2">
          <aff>
            <institution xml:lang="ru">Институт геологии и геохронологии докембрия РАН (Санкт-Петербург, Россия)</institution>
          </aff>
          <aff>
            <institution xml:lang="en">Institute of Precambrian Geology and Geochronology RAS (Saint Petersburg, Russia)</institution>
          </aff>
        </aff-alternatives>
        <contrib contrib-type="author">
          <name name-style="eastern">
            <surname>Puchkov</surname>
            <given-names>Viktor N.</given-names>
          </name>
          <name-alternatives>
            <name name-style="eastern" xml:lang="ru">
              <surname>Пучков</surname>
              <given-names>В. Н.</given-names>
            </name>
            <name name-style="western" xml:lang="en">
              <surname>Puchkov</surname>
              <given-names>Viktor N.</given-names>
            </name>
          </name-alternatives>
          <email>puchkv@ufaras.ru</email>
          <contrib-id contrib-id-type="orcid">0000-0003-2972-5497</contrib-id>
          <xref ref-type="aff" rid="aff3"/>
        </contrib>
        <aff-alternatives id="aff3">
          <aff>
            <institution xml:lang="ru">Институт геологии и геохимии им. академика А.Н.Заварицкого УрО РАН (Екатеринбург, Россия)</institution>
          </aff>
          <aff>
            <institution xml:lang="en">Zavaritsky Institute of Geology and Geochemistry of the Ural Branch of RAS (Ekaterinburg, Russia)</institution>
          </aff>
        </aff-alternatives>
      </contrib-group>
      <pub-date pub-type="epub" iso-8601-date="2025-06-27">
        <day>27</day>
        <month>06</month>
        <year>2025</year>
      </pub-date>
      <pub-date date-type="collection">
        <year>2025</year>
      </pub-date>
      <volume>276</volume>
      <issue>1</issue>
      <fpage>91</fpage>
      <lpage>100</lpage>
      <history>
        <date date-type="received" iso-8601-date="2024-08-28">
          <day>28</day>
          <month>08</month>
          <year>2024</year>
        </date>
        <date date-type="accepted" iso-8601-date="2025-01-28">
          <day>28</day>
          <month>01</month>
          <year>2025</year>
        </date>
        <date date-type="rev-recd" iso-8601-date="2025-12-29">
          <day>29</day>
          <month>12</month>
          <year>2025</year>
        </date>
      </history>
      <permissions>
        <copyright-statement>© Aleksei V. Berezin, Laysan I. Salimgaraeva, Viktor N. Puchkov</copyright-statement>
        <copyright-year>2025</copyright-year>
        <copyright-holder xml:lang="ru">А. В. Березин, Л. И. Салимгараева, В. Н. Пучков</copyright-holder>
        <copyright-holder xml:lang="en">Aleksei V. Berezin, Laysan I. Salimgaraeva, Viktor N. Puchkov</copyright-holder>
        <license xlink:href="http://creativecommons.org/licenses/by/4.0">
          <license-p>CC BY 4.0</license-p>
        </license>
      </permissions>
      <self-uri xlink:type="simple" xlink:href="https://pmi.spmi.ru/pmi/article/view/16576">https://pmi.spmi.ru/pmi/article/view/16576</self-uri>
      <abstract xml:lang="ru">
        <p>Представлено детальное изучение истории развития комплекса Марун-Кеу на Полярном Урале. С помощью оригинальных и литературных данных определены диапазоны значений температур и давлений магматической и метаморфической стадий эволюции пород, геотермический градиент и мощность континентальной коры. В термобарометрических расчетах для магматической стадии используют методы машинного обучения (алгоритм «случайного леса»), основанные на экспериментальных данных, и требуют минимальных петрохимических сведений о составе пород. Оценки PT параметров метаморфической стадии проводились программным комплексом THERIAK-DOMINO. Породы, вмещающие эклогиты, могут быть результатом частичного плавления континентальной коры под воздействием разогретых основных-ультраосновных расплавов. Установлено, что давление на пике эклогитового метаморфизма, вероятно, не превышало 21 кбар, а значения температуры – 730-750 °C. Регрессивный метаморфизм в эклогитах Марун-Кеу был ограничен температурой не выше 640 °С и давлением не ниже 5 кбар. Геотермический градиент при становлении протолитов эклогитов составлял 13 °С/км, что хорошо согласуется с современными данными для континентальной коры. Угол погружения субдуцировавшей плиты был оценен в 6-8°, а расчетная скорость субдукции составляла 2,2-2,9 см/год, что не противоречит гипотезе континентальной субдукции.</p>
      </abstract>
      <abstract xml:lang="en">
        <p>A comprehensive study of the evolutionary history of the Marun-Keu complex in the Polar Urals is presented. Utilizing both original data and published earlier information, this work establishes the temperature and pressure ranges corresponding to the magmatic and metamorphic stages of rock evolution, as well as estimates the geothermal gradient and continental crust thickness. Thermobarometric calculations for the magmatic stage were performed using machine learning techniques, specifically the “random forest” algorithm, based on experimental datasets and require minimal petrochemical input regarding rock composition. The pressure-temperature (PT) conditions of the metamorphic stage were evaluated using the THERIAK-DOMINO software package. The host rocks of the eclogites are interpreted as products of partial melting of continental crust induced by interaction with heated basic-ultramafic melts. Peak metamorphic pressures for the eclogites are estimated not to have exceeded approximately 21 kbar, with corresponding temperatures ranging 730-750 °C. Subsequent retrograde metamorphism within the Marun-Keu eclogites was constrained to temperatures below 640 °C and pressures above 5 kbar. The geothermal gradient during protolith formation of the eclogites was calculated to be approximately 13 °C/km, consistent with contemporary estimates for continental crustal settings. Furthermore, the subduction parameters were inferred, yielding an estimated slab dip angle of 6-8°, and a subduction velocity between 2.2 and 2.9 cm/year, which does not contradict the hypothesis of continental subduction.</p>
      </abstract>
      <kwd-group xml:lang="ru">
        <title>Ключевые слова</title>
        <kwd>метаморфизм</kwd>
        <kwd>петрогенезис</kwd>
        <kwd>геодинамика</kwd>
        <kwd>эклогит</kwd>
        <kwd>коровая эволюция</kwd>
        <kwd>субдукция</kwd>
      </kwd-group>
      <kwd-group xml:lang="en">
        <title>Keywords</title>
        <kwd>metamorphism</kwd>
        <kwd>petrogenesis</kwd>
        <kwd>geodynamics</kwd>
        <kwd>eclogite</kwd>
        <kwd>crust evolution</kwd>
        <kwd>subduction</kwd>
      </kwd-group>
      <funding-group>
        <funding-statement xml:lang="ru">Исследования выполнены в рамках проекта Российского научного фонда № 22-17-00177.</funding-statement>
        <funding-statement xml:lang="en">This research was funded by Russian Science Foundation, grant number N 22-17-00177.</funding-statement>
      </funding-group>
    </article-meta>
  </front>
  <body/>
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