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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">litosphere</journal-id><journal-title-group><journal-title xml:lang="ru">Литосфера</journal-title><trans-title-group xml:lang="en"><trans-title>LITHOSPHERE (Russia)</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1681-9004</issn><issn pub-type="epub">2500-302X</issn><publisher><publisher-name>A.N. Zavaritsky Institute of Geology and Geochemistry</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.24930/1681-9004-2026-26-4-915-934</article-id><article-id custom-type="edn" pub-id-type="custom">YISDDB</article-id><article-id custom-type="elpub" pub-id-type="custom">litosphere-2551</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>Статьи</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>Articles</subject></subj-group></article-categories><title-group><article-title>Особенности химического состава минералов редких элементов из пород западной части Уфалейского блока (Южный Урал)</article-title><trans-title-group xml:lang="en"><trans-title>Chemical composition of rare-element minerals from rocks of the western part of the Ufaley Block (Southern Urals)</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>Шардакова</surname><given-names>Г. Ю.</given-names></name><name name-style="western" xml:lang="en"><surname>Shardakova</surname><given-names>G. Yu.</given-names></name></name-alternatives><bio xml:lang="ru"><p>620110, г. Екатеринбург, ул. Академика Вонсовского, 15,</p></bio><bio xml:lang="en"><p>15 Academician Vonsovsky st., Ekaterinburg 620110</p></bio><email xlink:type="simple">shardakovagalina@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Прибавкин</surname><given-names>С. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Pribavkin</surname><given-names>S. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>620110, г. Екатеринбург, ул. Академика Вонсовского, 15,</p></bio><bio xml:lang="en"><p>15 Academician Vonsovsky st., Ekaterinburg 620110</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>Белковская</surname><given-names>Я. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Belkovskaya</surname><given-names>Ya. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>620014, г. Екатеринбург, ул. Куйбышева, 30</p></bio><bio xml:lang="en"><p>30 Kuibyshev st., Ekaterinburg 620014</p></bio><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Институт геологии и геохимии им. академика А.Н. Заварицкого УрО РАН</institution><country>Россия</country></aff><aff xml:lang="en"><institution>A.N. Zavaritsky Institute of Geology and Geochemistry, UB RAS</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Уральский государственный горный университет</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Ural State Mining University</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2026</year></pub-date><pub-date pub-type="epub"><day>29</day><month>08</month><year>2026</year></pub-date><volume>26</volume><issue>4</issue><elocation-id>915–934</elocation-id><permissions><copyright-statement>Copyright &amp;#x00A9; Шардакова Г.Ю., Прибавкин С.В., Белковская Я.А., 2026</copyright-statement><copyright-year>2026</copyright-year><copyright-holder xml:lang="ru">Шардакова Г.Ю., Прибавкин С.В., Белковская Я.А.</copyright-holder><copyright-holder xml:lang="en">Shardakova G.Y., Pribavkin S.V., Belkovskaya Y.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.lithosphere.ru/jour/article/view/2551">https://www.lithosphere.ru/jour/article/view/2551</self-uri><abstract><p>Объект исследования. Акцессорные минералы-концентраторы РЗЭ, Zr, Nb из жильных гранитов, плагиогранитов и вмещающих их амфиболитов западной части Уфалейского блока (Южный Урал). Цель работы. Изучить химический состав пород и видовое разнообразие содержащихся в них акцессорных минералов, локализованных в пределах крупной комплексной Нижнеуфалейско-Тахтинской геохимической аномалии Nb, Ta, Zr, Y. Методы исследования. Петрографическое описание пород, определение их химического состава и геохимических особенностей (РФА и ICP-MS), микрозондовый и LA-ICP-MS анализы состава минералов, их типизация. Результаты. Установлено, что основными концентраторами Nb, Zr, Y являются рутил, титанит, циркон, ксенотим-(Y), а концентраторами РЗЭ и Th – минералы группы монацита, эпидот и алланит-(Се), в разной степени преобразованные. Последние легко изменяются с образованием псевдоморфоз, состоящих из смесей различных минералов, для описания составов которых использован метод расчета на нормативные минералы (миналы). Показано, что псевдоморфозы состоят из церианита (или бастнезита-(Се)), монацита-(Се), флоренсита-(Се), титанатов Ce и Th, хаттонита, “Fe-Al-Si смеси”. Выводы. Показано, что в условиях неодноактной тектонотермальной активности и последующих приповерхностных процессов акцессорные минералы, содержащие Nb, Y, а также возникшие по алланиту-(Се) новообразованные фазы, обогащенные Ce, Th, способны накапливаться. Этим, вероятно, объясняется наличие обширной геохимической аномалии, предпосылкой формирования которой является первичная обогащенность пород редкими элементами, свойственная плюм-зависимым образованиям.  </p></abstract><trans-abstract xml:lang="en"><p>Research subject. Accessory minerals that contain REE, Zr, and Nb in vein granites, plagiogranites and the host amphibolites of the western Ufaley Block (Southern Urals). Aim. To study the chemical composition of rocks and the species diversity of their accessory minerals, localized within the large, complex geochemical Nizhneufaley–Takhta Nb–Ta–Zr–Y anomaly. Materials and methods. Petrographic description of the rocks, determination of their chemical composition and geochemical features, microprobe analysis of the mineral composition and their typification. Results. The principal hosts of Nb, Zr, and Y were found to be rutile, titanite, zircon, and xenotime-(Y), while REE, Th, and partly Y are hosted by minerals of the monazite group and the epidote supergroup (REE-rich epidote, allanite-(Ce)), transformed to varying degrees. The latter, allanite-(Ce) in particular, are readily altered to form pseudomorphs consisting of mixtures of various minerals, the compositions of which are determined by calculating normative mineral constituents (minals). The pseudomorphs were found to consist of cerianite (or bastnaesite-(Се)), monazite-(Ce), florencite-(Ce), Ce and Th-titanate, huttonite, and an Fe–Al–Si mixture. Conclusions. It is assumed that the conditions of repeated tectonic-thermal activity and subsequent near surface processes promoted the accumulation of accessory rocks containing Nb and Y, as well as well as newly formed Ce- and Th-enriched phases derived from allanite-(Ce). This likely explains the development of the extensive geochemical anomaly as a result of the primary enrichment of the studied rock types in rare elements, characteristic of plume-dependent series.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>Уфалейский блок</kwd><kwd>амфиболиты</kwd><kwd>граниты</kwd><kwd>плагиограниты</kwd><kwd>акцессорные минералы</kwd><kwd>псевдоморфозы</kwd><kwd>редкие элементы</kwd><kwd>редкоземельные элементы</kwd><kwd>геохимическая аномалия</kwd></kwd-group><kwd-group xml:lang="en"><kwd>Ufaley Block</kwd><kwd>amphibolites</kwd><kwd>granites</kwd><kwd>plagiogranites</kwd><kwd>accessory minerals</kwd><kwd>pseudomorphoses</kwd><kwd>rare and rare  earth elements</kwd><kwd>geochemical anomaly</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Работа выполнена в рамках государственного задания ИГГ УрО РАН, тема № 123011800009-9.</funding-statement><funding-statement xml:lang="en">The study was carried out within the framework of the State Assignment of the IGG Ural Branch of the Russian Academy of Sciences, topic No. 123011800009-9/</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">Акбарпуран Хайяти С.А., Гульбин Ю.Л., Сироткин А.Н., Гембицкая И.М. 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