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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">geores</journal-id><journal-title-group><journal-title xml:lang="ru">Георесурсы</journal-title><trans-title-group xml:lang="en"><trans-title>Georesources</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1608-5043</issn><issn pub-type="epub">1608-5078</issn><publisher><publisher-name>Georesursy LLC</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.18599/grs.2023.1.10</article-id><article-id custom-type="elpub" pub-id-type="custom">geores-88</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>ГЕОЛОГО-ГЕОХИМИЧЕСКИЕ И ГЕОФИЗИЧЕСКИЕ ИССЛЕДОВАНИЯ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>GEOLOGICAL, GEOCHEMICAL AND GEOPHYSICAL RESEARCH</subject></subj-group></article-categories><title-group><article-title>Первые данные о Th–REE минерализации в магматических породах основного-ультраосновного состава западного склона Южного Урала</article-title><trans-title-group xml:lang="en"><trans-title>First data on Th–REE mineralization in mafic-ultramafic igneous rocks of the western slope of the 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>Ковалев</surname><given-names>С. Г.</given-names></name><name name-style="western" xml:lang="en"><surname>Kovalev</surname><given-names>S. G.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Сергей Григорьевич Ковалев – доктор геол.-мин. наук, заведующий лабораторией</p><p>450077, Уфа, ул. Карла Маркса, д. 16/2</p></bio><bio xml:lang="en"><p>Sergei Grigorevich Kovalev – Dr. Sci. (Geology and Mineralogy), Chief of the Laboratory</p><p>16/2 Karl Marx st., Ufa, 450077</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>Ковалев</surname><given-names>С. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Kovalev</surname><given-names>S. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Сергей Сергеевич Ковалев – кандидат геол.-мин. наук, научный сотрудник лаборатории магматизма и метаморфизма</p><p>450077, Уфа, ул. Карла Маркса, д. 16/2</p></bio><bio xml:lang="en"><p>Sergei Sergeevich Kovalev – Cand. Sci. (Geology and Mineralogy), Researcher</p><p>16/2 Karl Marx st., Ufa, 450077</p></bio><email xlink:type="simple">kovalev@ufaras.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru">Институт геологии УФИЦ РАН<country>Россия</country></aff><aff xml:lang="en">Institute of Geology – Subdivision of the Ufa Federal Research Centre of the Russian Academy of Sciences<country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2023</year></pub-date><pub-date pub-type="epub"><day>13</day><month>04</month><year>2024</year></pub-date><volume>25</volume><issue>1</issue><fpage>95</fpage><lpage>107</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Ковалев С.Г., Ковалев С.С., 2024</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="ru">Ковалев С.Г., Ковалев С.С.</copyright-holder><copyright-holder xml:lang="en">Kovalev S.G., Kovalev S.S.</copyright-holder><license 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.geors.ru/jour/article/view/88">https://www.geors.ru/jour/article/view/88</self-uri><abstract><p>В статье приводятся первые данные о редкоземельной минерализации в дифференцированных интрузиях западного склона Южного Урала. При изучении минералогии пород шуйдинского, мисаелгинского, ишлинского и лысогорского комплексов были обнаружены минералы редкоземельных элементов (РЗЭ) (монацит-(Ce) и алланит- (Ce), торит (ауэрлит, чералит)) и РЗЭ-содержащие минералы (цирконолит-(Y) и эпидот). Детальный анализ химического состава минералов показал, что магматический монацит-(Се) и алланит-(Се) в значительной степени отличаются от метаморфогенных аналогов, описанных ранее в различных структурно-вещественных комплексах региона. Делается вывод о том, что редкоземельное минералообразование в породах основного/ультраосновного состава обусловлено дифференциацией расплава в магматической камере. Близкие температуры образования минералов из различных комплексов (ишлинский комплекс – 958°C , шуйдинский комплекс – 950–954°C, мисаелгинский комплекс – 947–952°C) свидетельствуют о тождественности процессов формирования монацита-(Се) и алланита-(Се). Сравнительный анализ магматических минералов РЗЭ и метаморфогенных аналогов выявил их различие, обусловленное, по нашему мнению, химизмом среды минералообразования.</p></abstract><trans-abstract xml:lang="en"><p>The article presents the first data on rare earth mineralization in differentiated intrusions on the western slope of the Southern Urals. When studying the mineralogy of the rocks of the Shuida, Misaelga, Ishliy and Lysogorsk complexes, minerals of rare earth elements (monazite-(Ce) and allanite-(Ce), thorite (auerlite, cheralite)) and REEbearing minerals (zirconolite-(Y) and epidote). A detailed analysis showed that igneous monazite-(Ce) and allanite- (Ce) are significantly different from the metamorphogenic analogues previously described in various structural-material complexes of the region. It is concluded that rare-earth mineral formation in rocks of basic/ultrabasic composition is due to differentiation of the melt in the magma chamber. Close temperatures of formation of minerals from different complexes (Ishliy complex – 958°C, Shuida complex – 950–954°C, Misaelga complex – 947–952°C) testify to the identity of the processes of formation of monazite-(Ce) and allanite-(Ce). opinion, the chemistry of the environment of mineral formation.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>Южный Урал</kwd><kwd>дифференцированные комплексы</kwd><kwd>монацит-(Се)</kwd><kwd>алланит-(Се)</kwd><kwd>торит</kwd><kwd>ауэрлит</kwd><kwd>чералит</kwd><kwd>цирконолит-(Y)</kwd></kwd-group><kwd-group xml:lang="en"><kwd>Southern Urals</kwd><kwd>differentiated complexes</kwd><kwd>monazite-(Ce)</kwd><kwd>allanite-(Ce)</kwd><kwd>thorite</kwd><kwd>auerlite</kwd><kwd>cheralite</kwd><kwd>zirconolite-(Y)</kwd></kwd-group><funding-group xml:lang="ru"><funding-statement>Исследования выполнены при финансовой поддержке гранта РНФ 23-27-00023.</funding-statement></funding-group><funding-group xml:lang="en"><funding-statement>The research was carried out within the framework of the State Assignment (subject No. FMRS-2022-0012).</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">Алексеев А.А., Алексеева Г.В., Ковалев С.Г. 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