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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">nznistu</journal-id><journal-title-group><journal-title xml:lang="ru">Науки о Земле и недропользование</journal-title><trans-title-group xml:lang="en"><trans-title>Earth sciences and subsoil use</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2686-9993</issn><issn pub-type="epub">2686-7931</issn><publisher><publisher-name>Federal State Budget Educational Institution of Higher Education "Irkutsk National Research Technical University"</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.21285/2686-9993-2020-43-2-145-159</article-id><article-id custom-type="elpub" pub-id-type="custom">nznistu-100</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>Геология, поиски и разведка месторождений полезных ископаемых</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>Geology, Prospecting and Exploration of Mineral Deposits</subject></subj-group></article-categories><title-group><article-title>Флюорит-бастнезитовые породы Улан-Удэнского редкоземельного проявления - новый тип карбонатитов (Россия, Западное Забайкалье)</article-title><trans-title-group xml:lang="en"><trans-title>Fluorite-bastnaesite rocks of the Ulan-Ude rare earth occurrence as a new type of carbonatites: Western Transbaikalia, Russia</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>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>кандидат геолого-минералогических наук, ведущий научный сотрудник лаборатории петрологии</p><p>670047, г. Улан-Удэ, ул. Сахьяновой, 6а, Россия</p></bio><bio xml:lang="en"><p>Cand. Sci. (Geol. &amp; Mineral.), Leading Researcher, Petrology Laboratory</p><p>6a Sakhynova St., Ulan-Ude 670047, Russia</p></bio><email xlink:type="simple">last@ginst.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>Ласточкин</surname><given-names>Е. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Lastochkin</surname><given-names>E. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>кандидат геолого-минералогических наук, научный сотрудник лаборатории петрологии</p><p>670047, г. Улан-Удэ, ул. Сахьяновой, 6а, Россия</p></bio><bio xml:lang="en"><p>Cand. Sci. (Geol. &amp; Mineral.), Researcher, Petrology Laboratory</p><p>6a Sakhynova St., Ulan-Ude 670047, Russia</p></bio><email xlink:type="simple">gin-buryatia-07@yandex.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>Дамдинова</surname><given-names>Л. Б.</given-names></name><name name-style="western" xml:lang="en"><surname>Damdinova</surname><given-names>L. B.</given-names></name></name-alternatives><bio xml:lang="ru"><p>кандидат геолого-минералогических наук, старший научный сотрудник лаборатории петрологии</p><p>670047, г. Улан-Удэ, ул. Сахьяновой, 6а, Россия</p></bio><bio xml:lang="en"><p>Cand. Sci. (Geol. &amp; Mineral.), Senior Researcher, Petrology Laboratory</p><p>6a Sakhynova St., Ulan-Ude 670047, Russia</p></bio><email xlink:type="simple">ludamdinova@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>Избродин</surname><given-names>И. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Izbrodin</surname><given-names>I. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>кандидат геолого-минералогических наук, старший научный сотрудник лаборатории петрологии</p><p>670047, г. Улан-Удэ, ул. Сахьяновой, 6а, Россия</p></bio><bio xml:lang="en"><p>Cand. Sci. (Geol. &amp; Mineral.), Senior Researcher, Petrology Laboratory</p><p>6a Sakhynova St., Ulan-Ude 670047, Russia</p></bio><email xlink:type="simple">izbrodin@ginst.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>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>кандидат геолого-минералогических наук, научный сотрудник лаборатории петрологии</p><p>670047, г. Улан-Удэ, ул. Сахьяновой, 6а, Россия</p></bio><bio xml:lang="en"><p>Cand. Sci. (Geol. &amp; Mineral.), Researcher, Petrology Laboratory</p><p>6a Sakhynova St., Ulan-Ude 670047, Russia</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>Савченко</surname><given-names>А. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Savchenko</surname><given-names>A. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>младший научный сотрудник лаборатории петрологии</p><p>670047, г. Улан-Удэ, ул. Сахьяновой, 6а, Россия</p></bio><bio xml:lang="en"><p>Junior Researcher, Petrology Laboratory</p><p>6a Sakhynova St., Ulan-Ude 670047, Russia</p></bio><email xlink:type="simple">njandani@yandex.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>Посохов</surname><given-names>В. Ф.</given-names></name><name name-style="western" xml:lang="en"><surname>Posokhov</surname><given-names>V. F.</given-names></name></name-alternatives><bio xml:lang="ru"><p>старший научный сотрудник лаборатории инструментальных методов анализа</p><p>670047, г. Улан-Удэ, ул. Сахьяновой, 6а, Россия</p></bio><bio xml:lang="en"><p>Senior Researcher, Laboratory of Instrumental Analysis Methods</p><p>6a Sakhynova St., Ulan-Ude 670047, Russia</p></bio><email xlink:type="simple">vitaf1@yandex.ru</email><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>2020</year></pub-date><pub-date pub-type="epub"><day>08</day><month>09</month><year>2020</year></pub-date><volume>43</volume><issue>2</issue><fpage>145</fpage><lpage>159</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Рипп Г.С., Ласточкин Е.И., Дамдинова Л.Б., Избродин И.А., Рампилов М.О., Савченко А.А., Посохов В.Ф., 2020</copyright-statement><copyright-year>2020</copyright-year><copyright-holder xml:lang="ru">Рипп Г.С., Ласточкин Е.И., Дамдинова Л.Б., Избродин И.А., Рампилов М.О., Савченко А.А., Посохов В.Ф.</copyright-holder><copyright-holder xml:lang="en">Ripp G.S., Lastochkin E.I., Damdinova L.B., Izbrodin I.A., Rampilov M.O., Savchenko A.A., Posokhov V.F.</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.nznj.ru/jour/article/view/100">https://www.nznj.ru/jour/article/view/100</self-uri><abstract><p>Целью работы является подтверждение магматической природы бастнезит-флюоритовых пород Улан-Удэнского проявления, представляющих собой специфический тип карбонатитов. Минералы были изучены с помощью электронной микроскопии, термометрии и анализа стабильных изотопов. Содержание флюорита и бастнезита в них нередко достигает 50 % (каждого). По времени образования (134,2±2,6 млн лет) данные породы близки к карбонатитам Западно-Забайкальской провинции. Температуры образования бастнезита и флюорита в них превышают 500 °С. В породах присутствуют фенокристы флюорита, бастнезита, тетраферрифлогопита. Кристаллизация их начиналась в промежуточном очаге. Матрица, сложенная тонкозернистым флюоритом с мелкими табличками бастнезита, формировалась в близповерхностных условиях и фиксируется закаленностью пород. Особенностью карбонатитов является «сухость» их расплава. Это определило крайне низкое проявление гидротермальных процессов, изменения ксенолитов и ранее образованных минералов. Свидетельством пониженной флюидонасыщенности является отсутствие во флогопите воды в позиции А, заполненной только фтором. Карбонатиты характеризуются повышенным содержанием сульфатов, представленных тенардитом, глауберитом, плюмбоярозитом, коркитом, присутствующих в составе солевых расплавов, выделившихся на поздней стадии кристаллизации расплава.</p></abstract><trans-abstract xml:lang="en"><p>The aim of the study is to show evidence confirm the magmatic nature of the bastnaesite-fluorite rocks of the Ulan-Ude occurrence that represent a specific type of carbonatites. The minerals have been studied using electron microscopy, thermometry, and analysis of stable isotopes. In many cases, the content of both fluorite and bastnaesite in the studied rocks reaches 50%. The rocks formation time (134.2 ± 2.6 Ma) is close to that of the carbonatites in the Western Transbaikalia province. The temperature of bastnaesite and fluorite formation in the rocks exceeds 500 C. The studied rocks contain phenocrysts of fluorite, bastnaesite, and tetraferriflogopite. Their crystallization began in the intermediate focus. The fine-grain fluorite matrix with small bastnaesite scales was formed in near-to-the-surface conditions and fixed by the hardening of the rocks. The carbonatites feature melt “dryness”, which determines an extremely low occurrence of the hydrothermal processes, changes in the xenoliths and previously formed minerals. The low fluid saturation level is confirmed by the absence of phlogopite water in position A, filled with fluorine only. The carbonatites are characterized by a higher content of sulfates represented by tenardite, glauberite, plumbojarosite, and corkite that are present in the composition of the salt melts released at the later stage of the melt crystallization.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>флюорит</kwd><kwd>бастнезит</kwd><kwd>карбонатит</kwd><kwd>глауберит</kwd><kwd>плюмбоярозит</kwd></kwd-group><kwd-group xml:lang="en"><kwd>fluorite</kwd><kwd>bastnaesite</kwd><kwd>carbonatite</kwd><kwd>glauberite</kwd><kwd>plumboyarozite</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Рипп Г.С., Избродин И.А., Ласточкин Е.И., Рампилов М.О., Дорошкевич А.Г., Хромова Е.А. Новый тип редкоземельного оруденения в Западном Забайкалье // Отечественная геология. 2018. № 3. 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