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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">10.24930/1681-9004-2025-25-6-1384-1403</article-id><article-id custom-type="edn" pub-id-type="custom">OOFITB</article-id><article-id custom-type="elpub" pub-id-type="custom">litosphere-2419</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>Цинкохромит в золотофукситовых прожилках на Au-Pd месторождении Чудное (Приполярный Урал): генетический аспект</article-title><trans-title-group xml:lang="en"><trans-title>Zincochromite in gold–fuchsite veins at the Chudnoe Au–Pd deposit (Subpolar Urals): Genetic aspects</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>Онищенко</surname><given-names>С. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Onishchenko</surname><given-names>S. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>167982; ул. Первомайская, 54; Сыктывкар</p></bio><bio xml:lang="en"><p>Sergei A. Onishchenko</p><p>167982; 54 Pervomaiskaya st.; Syktyvkar</p></bio><email xlink:type="simple">mine222@ya.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Институт геологии им. академика Н.П. Юшкина ФИЦ Коми НЦ УрО РАН</institution><country>Россия</country></aff><aff xml:lang="en"><institution>N.P. Yushkin Institute of Geology, FRC Komi SC UB RAS</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2025</year></pub-date><pub-date pub-type="epub"><day>26</day><month>12</month><year>2025</year></pub-date><volume>25</volume><issue>6</issue><fpage>1384</fpage><lpage>1403</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Онищенко С.А., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Онищенко С.А.</copyright-holder><copyright-holder xml:lang="en">Onishchenko S.A.</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/2419">https://www.lithosphere.ru/jour/article/view/2419</self-uri><abstract><sec><title>   Объект исследований</title><p>   Объект исследований. Цинкохромит в прожилках хромсодержащей слюды (фуксита) в метариолитах.</p></sec><sec><title>   Цель исследований</title><p>   Цель исследований. Изучение взаимоотношений цинкохромита с другими минералами и с Au-Pd минерализацией, определение места и роли цинкохромита в процессе минералообразования.</p></sec><sec><title>   Методы</title><p>   Методы. Изучались полированные шлифы из образцов руд и монтированных в эпоксидной смоле концентратов тяжелых минералов с использованием оптического и электронных микроскопов. Состав минералов выявлялся на сканирующих электронных микроскопах с энергодисперсионными спектрометрами.</p></sec><sec><title>   Результаты</title><p>   Результаты. Идиоморфные кристаллы цинкохромита в фукситовых прожилках (размером до 12 мкм) локализованы непосредственно в фуксите, реже в алланите, отмечены срастания с самородным золотом и арсеноантимонидами палладия. Цинкохромит содержит 15.5–27.5 мас. % ZnO и 40.2–47.5 мас. % Cr2O3. Формула наиболее богатого Zn минерала: (Zn0.77Fe2+0.13Mn0.10)(Cr1.37Fe3+0.42Al0.21)2O4. Содержание Cr2O3 в фуксите прожилков изменяется в значительном диапазоне (от 0.2 до 12.4 мас. %), но цинкохромит обычно заключен в фуксите с содержанием Cr2O3 более 1.5 мас. %.</p></sec><sec><title>   Выводы</title><p>   Выводы. Все породы в районе месторождения Чудное, в том числе руды, метаморфизованы в условиях биотитовой субфации зелено-сланцевой фации. Образование цинкохромита связано с метаморфическими преобразованиями фукситовых прожилков, заключенных в риолитах. При перекристаллизации фуксита за счет последнего формируются кристаллы цинкохромита. Цинк, необходимый для синтеза цинкохромита, поступил из метаморфизованных фукситовых прожилков и вмещающих риолитов.</p></sec></abstract><trans-abstract xml:lang="en"><sec><title>   Research subject</title><p>   Research subject. Zincochromite in veins of chromium-bearing mica (fuchsite) in metarhyolites.</p></sec><sec><title>   Aim</title><p>   Aim. To establish the relationships of zincochromite with other minerals and Au–Pd mineralization. To determine the place and role of zincochromite in the process of mineral formation.</p></sec><sec><title>   Methods</title><p>   Methods. Polished sections from ore samples and concentrates of heavy minerals mounted in epoxy resin were studied using optical and electron microscopes. The composition of minerals was determined using SEM/EDS.</p></sec><sec><title>   Results</title><p>   Results. Idiomorphic crystals of zincochromite in fuchsite veins (up to 12 µm in size) are localized directly in fuchsite, less frequently in allanite; intergrowths with native gold and palladium arsenoantimonides were noted. Zincochromite contains 15.5–27.5 wt % ZnO and 40.2–47.5 wt % Cr2O3. The most Zn-rich mineral has the following formula: (Zn0.77Fe2+0.13Mn0.10) (Cr1.37Fe3+ 0.42Al0.21)2O4. The Cr2O3 content in fuchsite veins varies across a significant range (from 0.2 to 12.4 wt %); however, zincochromite is usually enclosed in fuchsite with a Cr2O3 content of more than 1.5 wt %.</p></sec><sec><title>   Conclusions</title><p>   Conclusions. All rocks in the area of the Chudnoe deposit, including ores, are metamorphosed in the conditions of biotite subfacies of greenschist facies. The formation of zincochromite is associated with metamorphic transformations of fuchsite veins enclosed in rhyolites. During recrystallization of fuchsite, zincochromite crystals are formed at the expense of the latter. Zinc required for the synthesis of zincochromite came from metamorphosed fuchsite veins and host rhyolites.</p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>цинкохромит</kwd><kwd>хромсодержащий мусковит (фуксит)</kwd><kwd>Cu-Pd-содержащее золото</kwd><kwd>алланит</kwd><kwd>ганит</kwd><kwd>риолиты</kwd><kwd>метаморфические преобразования</kwd></kwd-group><kwd-group xml:lang="en"><kwd>zincochromite</kwd><kwd>chromium-containing mica (fuchsite)</kwd><kwd>Cu-Pd-containing gold</kwd><kwd>allanite</kwd><kwd>gahnite</kwd><kwd>metarhyolite</kwd><kwd>metamorphic transformations</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">Андреичев В.Л. 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