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<article article-type="research-article" dtd-version="1.3" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">gtcrust</journal-id><journal-title-group><journal-title xml:lang="ru">Геодинамика и тектонофизика</journal-title><trans-title-group xml:lang="en"><trans-title>Geodynamics &amp; Tectonophysics</trans-title></trans-title-group></journal-title-group><issn pub-type="epub">2078-502X</issn><publisher><publisher-name>Institute of the Earth's crust of the Russian Academy of Sciences, Siberian Branch</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.5800/GT-2022-13-4-0648</article-id><article-id custom-type="elpub" pub-id-type="custom">gtcrust-1543</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>ПАЛЕОГЕОДИНАМИКА</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>PALEOGEODYNAMICS</subject></subj-group></article-categories><title-group><article-title>ИСТОЧНИКИ И МЕХАНИЗМЫ ФОРМИРОВАНИЯ ЩЕЛОЧНЫХ РЕДКОМЕТАЛЛЬНЫХ ГРАНИТОВ ЗАШИХИНСКОГО МАССИВА НА ОСНОВЕ ГЕОХИМИЧЕСКИХ И Nd ИЗОТОПНЫХ ДАННЫХ</article-title><trans-title-group xml:lang="en"><trans-title>SOURCES AND MECHANISMS OF FORMATION OF ALKALINE RARE-METAL GRANITES AT THE ZASHIKHINSKY MASSIF BASED ON GEOCHEMICAL AND Nd ISOTOPE DATA</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Алымова</surname><given-names>Н. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Alymova</surname><given-names>N. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>664033, Иркутск, ул. Фаворского, 1а</p></bio><bio xml:lang="en"><p>1а Favorsky St, Irkutsk 664033</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Воронцов</surname><given-names>А. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Vorontsov</surname><given-names>A. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>664033, Иркутск, ул. Фаворского, 1а</p></bio><bio xml:lang="en"><p>1а Favorsky St, Irkutsk 664033</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Дриль</surname><given-names>С. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Dril</surname><given-names>S. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>664033, Иркутск, ул. Фаворского, 1а</p></bio><bio xml:lang="en"><p>1а Favorsky St, Irkutsk 664033</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Сотникова</surname><given-names>И. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Sotnikova</surname><given-names>I. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>664033, Иркутск, ул. Фаворского, 1а</p></bio><bio xml:lang="en"><p>1а Favorsky St, Irkutsk 664033</p></bio><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Институт геохимии им. А.П. Виноградова СО РАН</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Vinogradov Institute of Geochemistry, Siberian Branch of the Russian Academy of Sciences</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2022</year></pub-date><pub-date pub-type="epub"><day>12</day><month>10</month><year>2022</year></pub-date><volume>13</volume><issue>4</issue><fpage>648</fpage><lpage>648</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Алымова Н.В., Воронцов А.А., Дриль С.И., Сотникова И.А., 2022</copyright-statement><copyright-year>2022</copyright-year><copyright-holder xml:lang="ru">Алымова Н.В., Воронцов А.А., Дриль С.И., Сотникова И.А.</copyright-holder><copyright-holder xml:lang="en">Alymova N.V., Vorontsov A.A., Dril S.I., Sotnikova I.A.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://www.gt-crust.ru/jour/article/view/1543">https://www.gt-crust.ru/jour/article/view/1543</self-uri><abstract><p>При формировании месторождений редкометалльного стратегического сырья значимая роль принадлежит проявлениям внутриплитового щелочно-гранитного магматизма. С целью изучения вероятных источников щелочно-гранитных магм и механизмов их эволюции, приводящих к рудным накоплениям, вплоть до образования Nb-Ta месторождений, было проведено изотопно-геохимическое изучение пород Зашихинского массива (Восточно-Саянская зона, Главный Cаянский разлом). Впервые получены Nd изотопные характеристики щелочных гранитов массива, которые в совокупности с результатами проведенных ранее минералогических и геохимических исследований позволили предложить модель его формирования, в которой кристаллизационная дифференциация щелочно-гранитных расплавов происходит одновременно с ассимиляцией ими вмещающих гранитных и гранитно-метаморфических комплексов.</p></abstract><trans-abstract xml:lang="en"><p>The intraplate alkaline-granite magmatism essentially contributes to formation of rare-metal strategic raw materials. In the Major Sayan Fault of the East Sayan Mountains, the rocks of the Zashikhinsky (Pz3) massif were studied through the isotope-geochemical analysis to identify probable sources of alkaline-granite magma and mechanisms of their evolution resulting in ore accumulations, up to the formation of Nb-Ta deposits. The Nd isotopic characteristics of its alkaline granites were obtained for the first time. Together with the results of mineralogical and geochemical studies, they were applied for modeling its formation, in which crystallization differentiation of alkaline granite melts proceeds simultaneously with their assimilation of the enclosing granite-metamorphic formations.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>Зашихинский массив</kwd><kwd>редкометалльные граниты</kwd><kwd>Nb-Ta минерализация</kwd><kwd>ассимиляция</kwd><kwd>кристаллизационная дифференциация</kwd></kwd-group><kwd-group xml:lang="en"><kwd>Zashikhinsky massif</kwd><kwd>rare-metal granites</kwd><kwd>Nb-Ta mineralization</kwd><kwd>assimilation</kwd><kwd>crystallization differentiation</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Исследования выполнены в рамках государственного задания Минобрнауки РФ на проведение НИР по теме № 0284-2021-0008 «Геохимия, петрология и рудоносность интрузивных и вулканических щелочных комплексов и месторождений стратегических металлов, их мантийные источники» и проекта РФФИ № 20-05-00261_а «Петрология и геохимия редкометалльных щелочных гранитов, переходных по минеральным парагенезисам от агпаитовых к литий-фтористым (на примере Зашихинского месторождения)». В работе использован каменный материал из кол- лекции, созданной за долгие годы Н.В. Владыкиным.  Авторы посвящают эту работу его светлой памяти.</funding-statement><funding-statement xml:lang="en">The studies are performed as part of the state assignment of the Ministry of Science and Higher Education of the Russian Federation to research theme 0284-2021-0008 "Geochemistry, petrology and ore content of intrusive and volcanic alkaline complexes and deposits of strategic metals, their mantle sources" and RFBR project 20-05-00261_а "Petrology and geochemistry of rare-metal alkaline granites, transitional in mineral paragenesis from agpaite to lithium-fluoride, exemplified by the Zashikhinsky deposit".</funding-statement></funding-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Алымова Н.В., Владыкин Н.В. 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