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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-2021-12-2-0526</article-id><article-id custom-type="elpub" pub-id-type="custom">gtcrust-1213</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>УСЛОВИЯ ФОРМИРОВАНИЯ, U/Pb и 40Ar/39Ar ИЗОТОПНОЕ ДАТИРОВАНИЕ UHT ГРАНУЛИТОВ МЫСА КАЛТЫГЕЙ, ЗАПАДНОЕ ПРИБАЙКАЛЬЕ</article-title><trans-title-group xml:lang="en"><trans-title>P–T CONDITIONS, U/Pb AND 40Ar/39Ar ISOTOPIC AGES OF UHT GRANULITES FROM CAPE KALTYGEI, WESTERN BAIKAL REGION</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>Волкова</surname><given-names>Н. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Volkova</surname><given-names>N. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>630090, Новосибирск, пр-т Академика Коптюга, 3</p></bio><bio xml:lang="en"><p>3 Academician Koptyug Ave, Novosibirsk 630090</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>Михеев</surname><given-names>Е. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Mikheev</surname><given-names>E. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>630090, Новосибирск, пр-т Академика Коптюга, 3</p><p>630090, Новосибирск, ул. Пирогова, 1</p></bio><bio xml:lang="en"><p>3 Academician Koptyug Ave, Novosibirsk 630090</p><p>1 Pirogova St, Novosibirsk 630090</p></bio><email xlink:type="simple">mikheev@igm.nsc.ru</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Травин</surname><given-names>А. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Travin</surname><given-names>A. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>630090, Новосибирск, пр-т Академика Коптюга, 3</p><p>630090, Новосибирск, ул. Пирогова, 1</p><p>634050, Томск, пр-т Ленина, 36</p></bio><bio xml:lang="en"><p>3 Academician Koptyug Ave, Novosibirsk 630090</p><p>1 Pirogova St, Novosibirsk 630090</p><p>36 Lenin Ave, Tomsk 634050</p></bio><xref ref-type="aff" rid="aff-3"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Владимиров</surname><given-names>А. Г.</given-names></name><name name-style="western" xml:lang="en"><surname>Vladimirov</surname><given-names>A. G.</given-names></name></name-alternatives><bio xml:lang="ru"><p>630090, Новосибирск, пр-т Академика Коптюга, 3</p><p>634050, Томск, пр-т Ленина, 36</p></bio><bio xml:lang="en"><p>3 Academician Koptyug Ave, Novosibirsk 630090</p><p>36 Lenin Ave, Tomsk 634050</p></bio><xref ref-type="aff" rid="aff-4"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Мехоношин</surname><given-names>А. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Mekhonoshin</surname><given-names>A. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>664033, Иркутск, ул. Фаворского, 1а</p><p>664074, Иркутск, ул. Лермонтова, 83</p></bio><bio xml:lang="en"><p>1а Favorsky St, Irkutsk 664033</p><p>83 Lermontov St, Irkutsk 664074</p></bio><xref ref-type="aff" rid="aff-5"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Хлестов</surname><given-names>В. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Khlestov</surname><given-names>V. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>630090, Новосибирск, пр-т Академика Коптюга, 3</p></bio><bio xml:lang="en"><p>3 Academician Koptyug Ave, Novosibirsk 630090</p></bio><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Институт геологии и минералогии им. В.С. Соболева СО РАН</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Sobolev Institute of Geology and Mineralogy, Siberian Branch of the Russian Academy of Sciences</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Институт геологии и минералогии им. В.С. Соболева СО РАН; Новосибирский государственный университет</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Sobolev Institute of Geology and Mineralogy, Siberian Branch of the Russian Academy of Sciences; Novosibirsk State University</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-3"><aff xml:lang="ru"><institution>Институт геологии и минералогии им. В.С. Соболева СО РАН; Новосибирский государственный университет; Томский государственный университет</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Sobolev Institute of Geology and Mineralogy, Siberian Branch of the Russian Academy of Sciences; Novosibirsk State University; Tomsk State University</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-4"><aff xml:lang="ru"><institution>Институт геологии и минералогии им. В.С. Соболева СО РАН; Томский государственный университет</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Sobolev Institute of Geology and Mineralogy, Siberian Branch of the Russian Academy of Sciences; Tomsk State University</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-5"><aff xml:lang="ru"><institution>Институт геохимии им. А.П. Виноградова СО РАН; Иркутский национальный исследовательский технический университет</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Vinogradov Institute of Geochemistry, Siberian Branch of the Russian Academy of Sciences; Irkutsk National Research Technical University</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2021</year></pub-date><pub-date pub-type="epub"><day>23</day><month>06</month><year>2021</year></pub-date><volume>12</volume><issue>2</issue><fpage>310</fpage><lpage>331</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Волкова Н.И., Михеев Е.И., Травин А.В., Владимиров А.Г., Мехоношин А.С., Хлестов В.В., 2021</copyright-statement><copyright-year>2021</copyright-year><copyright-holder xml:lang="ru">Волкова Н.И., Михеев Е.И., Травин А.В., Владимиров А.Г., Мехоношин А.С., Хлестов В.В.</copyright-holder><copyright-holder xml:lang="en">Volkova N.I., Mikheev E.I., Travin A.V., Vladimirov A.G., Mekhonoshin A.S., Khlestov V.V.</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/1213">https://www.gt-crust.ru/jour/article/view/1213</self-uri><abstract><p>Метапелитовые гранулиты мыса Калтыгей в Западном Прибайкалье содержат критическую минеральную ассоциацию ультравысокотемпературных (UHT) метаморфических пород (orthopyroxene+sillimanite+quartz). Оценки условий формирования пород методом псевдосечений позволили установить пиковые значения температур и давлений (T=950 °C, P=~9 кбар) и показать, что ретроградная эволюция гранулитов характеризовалась субизобарическим остыванием (IBC). U/Pb оценки возраста метаморфизма (~1.87 млрд лет) подтверждают ранее полученные данные других исследователей. Оценка минимального U-Pb возраста (SHRIMP-II) протолита, полученная по ядрам цирконов, составила 1.94–1.91 млрд лет. 40Ar/39Ar изотопные возрасты биотитов и амфиболов из гранулитов мыса Калтыгей близки к возрасту формирования раннепалеозойской аккреционно-коллизионной системы Западного Прибайкалья.</p></abstract><trans-abstract xml:lang="en"><p>The study is focused on metapelitic granulites of Cape Kaltygei (Western Baikal region) that contain a diagnostic mineral assemblage of ultrahigh temperature (UHT) metamorphic rocks (orthopyroxene+sillimanite+quartz). The pseudosection-based thermobarometry yields peak metamorphic temperature and pressure values (T=950 °C, P=~9 kbar) and suggests near-isobaric cooling (IBC) conditions during the retrograde evolution of the granulites. The U/Pb zircon age estimates for metamorphism (~1.87 Ga) support the data published by other researchers. The SHRIMP-II U-Pb dating of zircon cores yields a minimum protolith age of 1.94–1.91 Ga. Biotites and amphiboles from granulites of Cape Kaltygei show the 40Ar/39Ar isotopic ages that are close to the Early Paleozoic accretion-collision system of the Western Baikal region.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>мыс Калтыгей</kwd><kwd>Западное Прибайкалье</kwd><kwd>UHT гранулиты</kwd><kwd>P–T псевдосечения</kwd><kwd>U-Pb и Ar-Ar изотопное датирование</kwd></kwd-group><kwd-group xml:lang="en"><kwd>Cape Kaltygei</kwd><kwd>Western Baikal region</kwd><kwd>UHT granulites</kwd><kwd>P–T pseudosections</kwd><kwd>U-Pb and Ar-Ar geochronology</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Исследование выполнено в рамках государственного задания ИГМ СО РАН.</funding-statement><funding-statement xml:lang="en">The study was carried out under the state assignment of the Institute of Geology and Mineralogy SB RAS.</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">Aranovich L.Y., Berman R.G., 1997. 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