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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">geology</journal-id><journal-title-group><journal-title xml:lang="ru">Известия высших учебных заведений. Геология и разведка</journal-title><trans-title-group xml:lang="en"><trans-title>Proceedings of higher educational establishments. Geology and Exploration</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">0016-7762</issn><issn pub-type="epub">2618-8708</issn><publisher><publisher-name>Sergo Ordzhonikidze Russian State University for Geological Prospecting</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.32454/0016-7762-2018-3-23-32</article-id><article-id custom-type="elpub" pub-id-type="custom">geology-298</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>МИНЕРАЛОГИЯ, ПЕТРОГРАФИЯ, ЛИТОЛОГИЯ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>MINERALOGY, PETROGRAPHY, LITHOLOGY</subject></subj-group></article-categories><title-group><article-title>КАМЕННОУГОЛЬНЫЙ 40Ar/39Ar ВОЗРАСТ РЕДКОМЕТАЛЛЬНЫХ РИОЛИТОВ И ИГНИМБРИТОВ В САКМАРСКОМ АЛЛОХТОНЕ ЮЖНОГО УРАЛА, ИХ ОСОБЕННОСТИ СОСТАВА И ОБСТАНОВКИ ФОРМИРОВАНИЯ</article-title><trans-title-group xml:lang="en"><trans-title>CARBONIFEROUS 40Ar/39Ar AGE OF THE RARE METAL-ENRICHED RHYOLITES AND IGNIMBRITES IN THE SAKMARA ALLOCHTHON OF THE SOUTHERN URALS, THEIR GEOCHEMICAL FEATURES AND GEODYNAMIC SETTING</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>Рязанцев</surname><given-names>А. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Ryazantsev</surname><given-names>A. V.</given-names></name></name-alternatives><bio xml:lang="ru"/><bio xml:lang="en"/><email xlink:type="simple">avryazan51@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>Пилицына</surname><given-names>А. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Pilitsina</surname><given-names>A. V.</given-names></name></name-alternatives><bio xml:lang="ru"/><bio xml:lang="en"/><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Новиков</surname><given-names>И. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Novikov</surname><given-names>I. A.</given-names></name></name-alternatives><bio xml:lang="ru"/><bio xml:lang="en"/><email xlink:type="simple">i.novikov@niigb.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>Дегтярев</surname><given-names>К. Е.</given-names></name><name name-style="western" xml:lang="en"><surname>Degtyarev</surname><given-names>K. E.</given-names></name></name-alternatives><bio xml:lang="ru"/><bio xml:lang="en"><p>7, Pyzhevsky street, Moscow 119017</p></bio><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Геологический институт РАН</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Geological Institute 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 рудных месторождений, петрографии, минералогии и геохимии РАН</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Institute of Geology of Ore Deposits, Petrography, Mineralogy and Geochemistry RAS</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2018</year></pub-date><pub-date pub-type="epub"><day>28</day><month>06</month><year>2018</year></pub-date><volume>0</volume><issue>3</issue><fpage>23</fpage><lpage>32</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Рязанцев А.В., Пилицына А.В., Новиков И.А., Дегтярев К.Е., 2018</copyright-statement><copyright-year>2018</copyright-year><copyright-holder xml:lang="ru">Рязанцев А.В., Пилицына А.В., Новиков И.А., Дегтярев К.Е.</copyright-holder><copyright-holder xml:lang="en">Ryazantsev A.V., Pilitsina A.V., Novikov I.A., Degtyarev K.E.</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.geology-mgri.ru/jour/article/view/298">https://www.geology-mgri.ru/jour/article/view/298</self-uri><abstract><p>В cтрyктype Caкмapcкoro аллохтона на Южном Уpaлe локально pacnpocтpaнeнa толща риолитов и игним6pитов, имеющих ниoбий-циpкoний-peдкoзeмeльнyю геохимическую специализацию. Толща несогласно залегает на смятых в складки палеозойских комплексах, включая девонские. Риолигы coдepжaт фенокpисталлы калиевого полевого шпага, кварца, глoмepoпopфиpoвыe cpocтки полевых шпатов и ксенолиты гранитов. По геохимическим особенностям вулканиты имeют признаки фopмиpoвaния во внyтpиплитнoй обстановке, а их состав oтвeчaeт гранитам А-тапа. 40Ar/39Ar вoзpacт фельзитовой основной массы pиoлитoв 303±2 млн. лeт и это значение oпpeдeляeт вoзpacт эффузивного комплекса. Для вкpaплeнникoв полевых шпатов получен вoзpacт 306±3 млн. лeт и 337±3 млн. лет. Пepвoe значение аналогично вoзpacтy матрикса и связано с фopмиpoвaниeм вулканического комплекса. Втopoe значение оросится, по-видимому, к ксеногенному мaтepиaпy. Полученные значения вoзpacтa хapaктepизyют эволюцию каменноугольного магматизма в структуре активной континентальной окраины, пpoявлeннoгo в paзных cтpyктypных зонах Урала. Комплекс peдкoмeталпьных pиoлитoв хapaктepизyeт финальный позднекаменноугольный внyтpиплигный рифтогенный) магматизм в тыловой части активной окраины. Фopмиpoвaниe комплекса пpeдшecтвoвaлo связанному с коллизией шapьиpoвaнию офиолитовых аллохтонов.</p></abstract><trans-abstract xml:lang="en"><p>In the structure of the Sakmara allochthon of the Southern Uralssequence with rhyolites and ignimbrites locally occures. They have Nb-Zr-REE geochemical specialization. This sequence unconformably overlays folded Paleozoic complexes, including the Devonian ones. Rhyolite contains K-feldspar and quartz phenocrysts, K-feldspar glomeroporphyrites and granite xenolith. Geochemical features of the rhyolites show intraplate-originated affinities and A-type granite composition. 40Ar/39Ar age of the felsitic matrix of the rhyolites of 303±2 Ma defines the age of the volcanic complex origin. For feldspar phenocrysts the age of 306±3 Ma and 337±3 Ma is obtained. The first value coincides to the matrix age and connected with formation of the volcanic complex. The second value belongs, apparently, to xenogenic material. Obtained age values reflect the evolution of Carboniferous active continental margin magmatism, widespread in different structural zones of the Urals. Rare-metal rhyolites characterize the final late Carboniferous intraplate (rift-related) back-arc magmatism at the active continental margin. Volcanism preceded to a collision-related ophiolitic thrust nappes emplacement.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>peдкoмeтапльныe pиолиты игнимбpигы</kwd><kwd>Урал</kwd><kwd>активная континентальная окраина</kwd><kwd>коллизия</kwd><kwd>pифтoгeнeз</kwd><kwd>кapбoн</kwd><kwd>40Ar/39Ar вoзpacт</kwd></kwd-group><kwd-group xml:lang="en"><kwd>rare metal-enriched rhyolite</kwd><kwd>ignimbrite</kwd><kwd>Urals</kwd><kwd>active continental margin</kwd><kwd>rifting</kwd><kwd>collision</kwd><kwd>carboniferous</kwd><kwd>40Ar/39Ar age</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">Иванов К.С. Ультракалиевые липаритовые порфиры на Урале // ДАН СССР. 1979. Т.247. № 4. С. 908-912.</mixed-citation><mixed-citation xml:lang="en">Ivanov K.S. Ultra-Potassium liparite porphyres in the Urals. Doklady of the USSR Academy of Sciences, 1979, vol. 247, no 4, pр. 908-912. 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