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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">10.24930/1681-9004-2019-19-4-598-614</article-id><article-id custom-type="elpub" pub-id-type="custom">litosphere-1196</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>Редкометалльная минерализация альбитовых гранитов Западного Забайкалья</article-title><trans-title-group xml:lang="en"><trans-title>Rare metal mineralization in albite-bearing granites of Western Trans-Baikal</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>Рампилов</surname><given-names>М. О.</given-names></name><name name-style="western" xml:lang="en"><surname>Rampilov</surname><given-names>M. O.</given-names></name></name-alternatives><bio xml:lang="ru"><p>670047, Улан-Удэ, ул. Сахьяновой, 6а</p></bio><bio xml:lang="en"><p>Mikhail O. Rampilov</p><p> </p><p>6а Sakhyanova st., Ulan-Ude, 670047</p></bio><email xlink:type="simple">mrampilov@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>Рипп</surname><given-names>Г. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Ripp</surname><given-names>G. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>670047, Улан-Удэ, ул. Сахьяновой, 6а</p></bio><bio xml:lang="en"><p>German S. Ripp</p><p>6а Sakhyanova st., Ulan-Ude, 670047</p></bio><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Геологический институт, СО РАН</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Geological institute, SB RAS</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2019</year></pub-date><pub-date pub-type="epub"><day>10</day><month>09</month><year>2019</year></pub-date><volume>19</volume><issue>4</issue><fpage>598</fpage><lpage>614</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Рампилов М.О., Рипп Г.С., 2019</copyright-statement><copyright-year>2019</copyright-year><copyright-holder xml:lang="ru">Рампилов М.О., Рипп Г.С.</copyright-holder><copyright-holder xml:lang="en">Rampilov M.O., Ripp G.S.</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/1196">https://www.lithosphere.ru/jour/article/view/1196</self-uri><abstract><sec><title>Объекты исследований</title><p>Объекты исследований. В статье представлены результаты минералого-геохимического изучения альбитовых гранитов, отличающихся повышенным содержанием редких элементов, распространенных на территории Западного Забайкалья.</p></sec><sec><title>Материалы и методы</title><p>Материалы и методы. Определение химического состава пород проведено методами классического силикатного анализа, рентгено-флуоресцентным и масс-спектрометрическим с индуктивно-связанной плазмой. Диагностика минералов, взаимоотношения и их однородность изучались на электронном микроскопе LEO-1430 с энергодисперсионным спектрометром IncaEnergy-300. Изотопный состав кислорода в минералах определен на масс-спектрометре FiniganMAT-253 в режиме двойной системы напуска.</p></sec><sec><title>Результаты</title><p>Результаты. Рудная специализация изученных пород определилась присутствием ниобиевых и, в меньшей степени, редкоземельных минералов. Изученные участки представлены двумя группами - слабо альбитизированными гранитами и сильно альбитизирован-ными гранитами и альбититами. Выделенные группы различаются составом акцессорной минерализации. Сильно альбитизированные граниты относятся к щелочным рибекит-альбитовым гранитам с большим многообразием минералов ниобия, циркония, иттрия и редких земель. В этих породах помимо собственных иттриевых минералов (таленит, иттриалит, фергусонит) до 4 мас. % иттрия находится в составе титанита, чевкинита, торита, монацита. В отличие от них в слабо альбитизированных гранитах иттрий и тяжелые лантаноиды играют подчиненную роль. Здесь представлены большей частью минералы, селективно обогащенные легкими лантаноидами (монацит, алланит, флюоцерит, самарскит).</p></sec><sec><title>Выводы</title><p>Выводы. Выделенные группы отличаются минерально-геохимическими характеристиками. Главным концентратором ниобия в альбитизированных гранитах является колумбит. Минералы из альбититов обогащены иттрием и тяжелыми РЗЭ. Ниобий в них сконцентрирован преимущественно в пирохлоре, ферсмите и фергусоните. Изотопными исследованиями установлено, что в образовании альбитизированных гранитов участвовал флюид магматического происхождения.</p></sec></abstract><trans-abstract xml:lang="en"><sec><title>Research subject</title><p>Research subject. The article presents results of mineralogical and geochemical investigation of albite-bearing granites with high concentrations of trace elements located in the Western Trans-Baikal region.</p></sec><sec><title>Methods</title><p>Methods. The composition of rocks was determined by the methods of classical silicate analysis, X-ray fluorescence and ICP-MS analysis. Microstructural features, relationships and homogeneity of minerals were studied using an electron microscope LEO-1430 equipped with an energy dispersive spectrometer Inca Energy-300. Isotopic compositions of oxygen were carried out using a mass spectrometer Finigan MAT 253 in the mode of a constant helium flow.</p></sec><sec><title>Results</title><p>Results. Ore mineralization is specified by the presence of Nb-bearing and less REE-bearing minerals. The studied rocks were divided into two groups: albitized granites, and deep albitized granites and albitites. These groups differ in terms of the presence of accessory minerals. The deep albitized granites and albitites belong to alkaline riebeckite-albite granites containing Nb-, Zr-, Y- and REE-bearing minerals. These rocks contain Y-bearing minerals - thalenite and yttrialite, with an up to 4 wt % inclusion of Y2O3 in titanite, chevkinite, thorite and monazite. In contrast, the albitized granites contain fewer amounts of Y and HREE along with LREE-bearing minerals (monazite, allanite, fluocerite, samarskit).</p></sec><sec><title>Conclusion</title><p>Conclusion. The selected groups of rocks have been analyzed in terms of their mineral and geochemical characteristics. The main Nb-bearing mineral in albitized granites is columbite. Minerals from albitites are rich in Y and HREE. The isotopic investigation has shown involvement of a magmatic-derived fluid in the rock formation process.</p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>альбитизация</kwd><kwd>редкометалльная минерализация</kwd><kwd>редкометалльный гранит</kwd><kwd>Западное Забайкалье</kwd></kwd-group><kwd-group xml:lang="en"><kwd>albitization</kwd><kwd>rare metal mineralization</kwd><kwd>rare metal granites</kwd><kwd>Western Transbaikalia Acknowledgements</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Исследования проведены при поддержке грантов Президента РФ МК-1014.2019.5 и РФФИ 1705-00129</funding-statement><funding-statement xml:lang="en">Research conducted with the support of grants of President RF MK-1014.2019.5 and Russian Foundation for Basic Research 17-05-00129</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">Анникова И.Ю., Владимиров А.Г., Выставной С.А., Василевский А.Н., Витте Л.В., Мороз Е.Н. 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