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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">IXSNOY</article-id>
      <article-id custom-type="pmi" pub-id-type="custom">pmi-16652</article-id>
      <article-id pub-id-type="uri">https://pmi.spmi.ru/pmi/article/view/16652</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">High-alumina gneisses of the Chupa Formation in the Belomorian Mobile Belt: metamorphic conditions, partial melting, and the age of migmatites</article-title>
        <trans-title-group xml:lang="ru">
          <trans-title>Высокоглиноземистые гнейсы чупинской толщи Беломорского подвижного пояса: условия метаморфизма, парциальное плавление и возраст мигматитов</trans-title>
        </trans-title-group>
      </title-group>
      <contrib-group>
        <contrib contrib-type="author" corresp="yes">
          <name name-style="eastern">
            <surname>Yurchenko</surname>
            <given-names>Anastasiya V.</given-names>
          </name>
          <name-alternatives>
            <name name-style="eastern" xml:lang="ru">
              <surname>Юрченко</surname>
              <given-names>А. В.</given-names>
            </name>
            <name name-style="western" xml:lang="en">
              <surname>Yurchenko</surname>
              <given-names>Anastasiya V.</given-names>
            </name>
          </name-alternatives>
          <email>yurchenko-nastya@yandex.ru</email>
          <contrib-id contrib-id-type="orcid">0000-0002-3999-5151</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">
          <name name-style="eastern">
            <surname>Baltybaev</surname>
            <given-names>Shauket K.</given-names>
          </name>
          <name-alternatives>
            <name name-style="eastern" xml:lang="ru">
              <surname>Балтыбаев</surname>
              <given-names>Ш. К.</given-names>
            </name>
            <name name-style="western" xml:lang="en">
              <surname>Baltybaev</surname>
              <given-names>Shauket K.</given-names>
            </name>
          </name-alternatives>
          <email>shauket@mail.ru</email>
          <contrib-id contrib-id-type="orcid">0000-0002-6484-2042</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>Myskova</surname>
            <given-names>Tatyana A.</given-names>
          </name>
          <name-alternatives>
            <name name-style="eastern" xml:lang="ru">
              <surname>Мыскова</surname>
              <given-names>Т. А.</given-names>
            </name>
            <name name-style="western" xml:lang="en">
              <surname>Myskova</surname>
              <given-names>Tatyana A.</given-names>
            </name>
          </name-alternatives>
          <email>tmyskova@gmail.com</email>
          <contrib-id contrib-id-type="orcid">0000-0001-6911-7694</contrib-id>
          <xref ref-type="aff" rid="aff3"/>
        </contrib>
        <aff-alternatives id="aff3">
          <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-group>
      <pub-date pub-type="epub" iso-8601-date="2025-12-11">
        <day>11</day>
        <month>12</month>
        <year>2025</year>
      </pub-date>
      <pub-date date-type="collection">
        <year>2026</year>
      </pub-date>
      <volume>277</volume>
      <fpage>26</fpage>
      <lpage>44</lpage>
      <history>
        <date date-type="received" iso-8601-date="2025-01-29">
          <day>29</day>
          <month>01</month>
          <year>2025</year>
        </date>
        <date date-type="accepted" iso-8601-date="2025-07-02">
          <day>02</day>
          <month>07</month>
          <year>2025</year>
        </date>
        <date date-type="rev-recd" iso-8601-date="2026-02-27">
          <day>27</day>
          <month>02</month>
          <year>2026</year>
        </date>
      </history>
      <permissions>
        <copyright-statement xml:lang="ru">© 2025 А. В. Юрченко, Ш. К. Балтыбаев, Т. А. Мыскова</copyright-statement>
        <copyright-statement xml:lang="en">© 2025 Anastasiya V. Yurchenko, Shauket K. Baltybaev, Tatyana A. Myskova</copyright-statement>
        <copyright-year>2025</copyright-year>
        <copyright-holder xml:lang="ru">А. В. Юрченко, Ш. К. Балтыбаев, Т. А. Мыскова</copyright-holder>
        <copyright-holder xml:lang="en">Anastasiya V. Yurchenko, Shauket K. Baltybaev, Tatyana A. Myskova</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/16652">https://pmi.spmi.ru/pmi/article/view/16652</self-uri>
      <abstract xml:lang="ru">
        <p>В чупинской парагнейсовой толще Беломорского подвижного пояса (БПП) Фенноскандинавского щита изучены мигматизированные гнейсы и определены условия частичного плавления при высокоградном метаморфизме пород. Температуры и давления плавления пород, количество и состав расплава, который образуется при плавлении гнейсов в условиях замкнутой системы, определялись путем прямого компьютерного термодинамического моделирования минералообразования и построения псевдосечений в координатах «давление – температура». Расчеты минералообразования основаны на принципе минимизации энергии Гиббса системы и реализованы с помощью программного комплекса PERPLE_X. Для расчетов использовались валовые составы мигматизируемых пород чупинской толщи, предварительно ранжированные и сгруппированные по содержанию петрогенных компонентов. Показано, что при водонасыщенном частичном плавлении различающихся по составу гнейсов образуются гранитные или гранодиорит-тоналитовые расплавы в температурном диапазоне 680-730 °С при средних и умеренно высоких давлениях. Установлено, что ключевым фактором, определяющим появление в изученных породах кианита, является повышенное отношение Al2O3/CaO (не менее 5:1) в протолите при суммарном содержании щелочей (Na2O + K2O), превосходящем CaO. В соответствии с индексом зрелости осадков CIA, протолиты гнейсов содержали обломочный материал различной степени седиментационной зрелости. Протолитами могли быть слабо и умеренно выветрелые источники сноса. U-Pb ID-TIMS датирование монацита из двух проб гранат-кианит-биотитового мигматита (из породы в целом) выявило палеопротерозойское время мигматизации чупинских гнейсов (1854±5 млн лет назад). Этот этап палеопротерозойской эндогенной активности широко проявлен в БПП и может быть связан с процессами формирования Лапландско-Кольского или Свекофеннского орогенов, расположенных к северо-востоку и юго-западу от этого пояса.</p>
      </abstract>
      <abstract xml:lang="en">
        <p>Migmatized gneisses of the Chupa paragneiss Formation in the Belomorian Mobile Belt (BMB) of the Fennoscandian Shield have been studied, and the conditions of partial melting during high-grade metamorphism of the rocks were determined. The melting temperatures and pressures, the amount and composition of the melt formed during the anatexis of gneisses in a closed system, were assessed through direct thermodynamic computer modeling of mineral formation and the construction of pseudosections in pressure-temperature coordinates. The mineral formation calculations are based on the principle of Gibbs energy minimization and were performed using the PERPLE_X software package. The bulk compositions of the migmatized rocks from the Chupa Formation, previously classified and grouped based on their major components, were used for the calculations. It is shown that water-saturated partial melting of compositionally diverse gneisses produces granitic or granodiorite-tonalitic melts within a temperature range of 680-730 °C at moderate to moderately high pressures. The study reveals that the key factor controlling the appearance of kyanite in the investigated rocks is a high Al2O3/CaO ratio (at least 5:1) in the protolith, combined with a total alkali content (Na2O + K2O) exceeding CaO. According the Chemical Index of Alteration (CIA), the protoliths of the gneisses contained detrital material of varying sedimentary maturity. The source rocks were likely weakly to moderately weathered. U-Pb ID-TIMS dating of monazite from two samples of garnet-kyanite-biotite migmatite (whole-rock analysis) indicates Paleoproterozoic migmatization of the Chupa gneisses at 1854 ± 5 Ma. This phase of Paleoproterozoic endogenic activity is widely recorded in the BMB and may be associated with the formation of the Lapland-Kola or Svecofennian orogens, located to the northeast and southwest of the belt, respectively.</p>
      </abstract>
      <kwd-group xml:lang="ru">
        <title>Ключевые слова</title>
        <kwd>мигматиты</kwd>
        <kwd>Беломорье</kwd>
        <kwd>протолит</kwd>
        <kwd>кианит</kwd>
        <kwd>чупинские гнейсы</kwd>
        <kwd>частичное плавление</kwd>
        <kwd>датирование</kwd>
        <kwd>моделирование</kwd>
      </kwd-group>
      <kwd-group xml:lang="en">
        <title>Keywords</title>
        <kwd>migmatites</kwd>
        <kwd>Belomorian Mobile Belt</kwd>
        <kwd>protolith</kwd>
        <kwd>kyanite</kwd>
        <kwd>Chupa gneisses</kwd>
        <kwd>partial melting</kwd>
        <kwd>dating</kwd>
        <kwd>modeling</kwd>
      </kwd-group>
      <funding-group>
        <funding-statement xml:lang="ru">Исследование выполнено за счет средств гранта Российского научного фонда № 25-27-00117.</funding-statement>
        <funding-statement xml:lang="en">The research was carried out at the expense of a grant from the Russian Science Foundation N 25-27-00117.</funding-statement>
      </funding-group>
    </article-meta>
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