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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">10.24930/2500-302X-2024-24-6-1029-1045</article-id><article-id custom-type="elpub" pub-id-type="custom">litosphere-2194</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>Благороднометалльная минерализация и условия образования Au-Ag эпитермальных жил на Au-Mo-Cu-порфировом месторождении Кызык-Чадр (Восточная Тува)</article-title><trans-title-group xml:lang="en"><trans-title>Noble-metal mineralization and conditions of formation of Au-Ag epithermal veins from Kyzik-Chadr Au-Mo-Cu porphyry deposit, Eastern Tuva</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>Кужугет</surname><given-names>Р. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Kuzhuget</surname><given-names>R. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>г. Кызыл, ул. Интернациональная, 117а</p></bio><bio xml:lang="en"><p>Renat V. Kuzhuget</p><p>117a Internatsionalnaya st., Kyzyl 667007</p></bio><email xlink:type="simple">rkuzhuget@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>Анкушева</surname><given-names>Н. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Ankusheva</surname><given-names>N. N.</given-names></name></name-alternatives><bio xml:lang="ru"><p> г. Миасс, 456317</p></bio><bio xml:lang="en"><p>Natalia N. Ankusheva</p><p>Miass, Chelyabinsk Region 456317</p></bio><email xlink:type="simple">ankusheva@mail.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>Калинин</surname><given-names>Ю. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Kalinin</surname><given-names>Yu. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>630090, г. Новосибирск, пр-т Академика Коптюга, 3</p></bio><bio xml:lang="en"><p>Yury A. Kalinin</p><p>3 Academician Koptyug av., Novosibirsk 630090</p></bio><email xlink:type="simple">yuri.a.kalinin@mail.ru</email><xref ref-type="aff" rid="aff-3"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Шавекина</surname><given-names>А. Ш.</given-names></name><name name-style="western" xml:lang="en"><surname>Shavekina</surname><given-names>A. Sh.</given-names></name></name-alternatives><bio xml:lang="ru"><p>630090, г. Новосибирск, пр-т Академика Коптюга, 3</p></bio><bio xml:lang="en"><p>Alfiia Sh. Shavekina</p><p>3 Academician Koptyug av., Novosibirsk 630090</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>Лосев</surname><given-names>В. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Losev</surname><given-names>V. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>660025, г. Красноярск, пер. Вузовский, 3</p></bio><bio xml:lang="en"><p>Vladimir I. Losev</p><p>3 Vavilova st., Krasnoyarsk 660025</p></bio><email xlink:type="simple">vovalosev98@gmail.com</email><xref ref-type="aff" rid="aff-4"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Баланай</surname><given-names>М. М.</given-names></name><name name-style="western" xml:lang="en"><surname>Balanay</surname><given-names>M. M.</given-names></name></name-alternatives><bio xml:lang="ru"><p>г. Кызыл, ул. Интернациональная, 117а</p></bio><bio xml:lang="en"><p>Mila M. Balanay</p><p>117a Internatsionalnaya st., Kyzyl 667007</p></bio><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Тувинский институт комплексного освоения природных ресурсов СО РАН</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Tuvinian Institute for Exploration of Natural Resources SB RAS</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>ЮУ ФНЦ МиГ УрО РАН, Ильменский заповедник</institution><country>Россия</country></aff><aff xml:lang="en"><institution>SU FRC MG UB RAS, Ilmensky Reserve</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</institution><country>Россия</country></aff><aff xml:lang="en"><institution>V.S. Sobolev Institute of Geology and Mineralogy, SB RAS</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-4"><aff xml:lang="ru"><institution>Сибирский федеральный университет</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Siberian Federal University</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2024</year></pub-date><pub-date pub-type="epub"><day>15</day><month>01</month><year>2025</year></pub-date><volume>24</volume><issue>6</issue><fpage>1029</fpage><lpage>1045</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Кужугет Р.В., Анкушева Н.Н., Калинин Ю.А., Шавекина А.Ш., Лосев В.И., Баланай М.М., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Кужугет Р.В., Анкушева Н.Н., Калинин Ю.А., Шавекина А.Ш., Лосев В.И., Баланай М.М.</copyright-holder><copyright-holder xml:lang="en">Kuzhuget R.V., Ankusheva N.N., Kalinin Y.A., Shavekina A.S., Losev V.I., Balanay M.M.</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/2194">https://www.lithosphere.ru/jour/article/view/2194</self-uri><abstract><p>Объект исследований. Рассмотрены результаты минералого-геохимических, термобарогеохимических и изотопно-геохимических исследований Au-Ag эпитермальных жил Au-Mo-Cu-порфирового месторождения Кызык-Чадр (Восточная Тува). Целью работы является установление минералого-геохимических особенностей и условий образования золотосульфидно-кварцевых жил месторождения Кызык-Чадр для определения его рудно-формационной принадлежности. Методы. Химический состав минералов установлен методом сканирующей электронной микроскопии. Условия образования жил, газовый и солевой состав растворов во флюидных включениях определены методами микротермометрии и рамановской спектроскопии. Изотопный состав кислорода в кварце и серы в сульфидах выявлен методами изотопной геохимии. Результаты. Установлено широкое разнообразие минеральных форм Au и Ag в золотосульфидно-кварцевых жилах благодаря вариациям fO2, fS2, fSe2 и fTe2 в процессе рудоотложения: золото, Hg-золото, Hg-электрум, Hg-кюстелит, вейшанит (Au,Ag)1.2Hg0.8, сильванит AgAuTe2, петцит Ag3AuTe2, гессит Ag2Te, штютцит Ag5Te3, эмпрессит AgTe, фишессерит Ag3AuSe2, Se-ютенбогардтит Ag3AuS2, акантит Ag2S, которые ассоциируют с алтаитом PbTe, колорадоитом HgTe, клаусталитом PbSe, блеклыми рудами ряда теннантит-тетраэдрит и баритом. Анализ флюидных включений (термометрия, рамановская спектроскопия) в кварце и минеральная термометрия (парагенезис петцит–гессит–самородное Au) позволили определить, что рудные жилы отлагались из углекислотно-водного Na-K ± Mg-хлоридного флюида с соленостью 5.7–10.0 мас. % NaСl-экв. при снижении температур от 360 до 230°C и вариациях fO2, fS2, fSe2 и fTe2. Изотопия кислорода в кварце указывает на смешение магматического флюида с метеорной водой (δ18O флюида от +3.5 до +7.1‰). Значения δ34SH2S флюида от +7.1 до +5.2‰ позволяют предполагать, что часть серы была извлечена из вмещающих пород. Выводы. По минералого-геохимическим особенностям и условиям образования золотосульфидно-кварцевые жилы Au-Mo-Cu-порфирового месторождения Кызык-Чадр могут быть отнесены к промежуточному типу эпитермальных Au-Ag жил, которые являются продуктом деятельности единой порфирово-эпитермальной рудно-магматической системы в Кызык-Чадрском рудном поле.</p></abstract><trans-abstract xml:lang="en"><p>Research object. The results of mineralogical-geochemical, fluid inclusion and isotopic studies of Au-Ag epithermal veins of Kyzik-Chadr Au-Mo-Cu porphyry deposit (Eastern Tuva) are considered. The aim of the study is to examine mineralogical and geochemical peculiarities and conditions of formation of gold-sulfide-quartz veins from Kyzik-Chadr deposit to identify their ore-formation. Methods. The chemical composition of minerals was determined by SEM (Tescan MIRA 3 LMU with XMax 80 and INCA Wave 500 (Oxford Instruments Nanoanalysis Ltd). Fluid inclusion study in quartz were carried out using a Linkam TMS-600 thermostage with LinkSystem 32 DV-NC software and an Olympus BX51 optical microscope. The oxygen isotopic composition of quartz was determined on a FINNIGAN MAT 253 gas mass spectrometer. The isotopic composition of sulfur in sulfides was determined using a Finnigan MAT Delta gas mass spectrometer in the double-infusion mode. Results. A wide variety of Au-Ag minerals in gold-sulfide-quartz veins due to variations of fO2, fS2, fSe2 and fTe2 during ore formation was diagnosed: gold, Hg-gold, Hg-electrum, Hg-kustelite, weishanite (Au,Ag)1.2Hg0.8, sylvanite AgAuTe2, petzite Ag3AuTe2, hessite Ag2Te, schützite Ag5Te3, empressite AgTe, fischerite Ag3AuSe2, Se-uytenbogaardtite Ag3AuS2, acanthite Ag2S, which are associated with altaiite PbTe, coloradoite HgTe, claustalite PbSe, fahlores of tennantite-tetrahedrite series and barite. The study of fluid inclusions (thermometry, Raman spectroscopy) in quartz and mineral thermometry (petzite–hessite–native Au paragenesis) determined that the ore veins were formed due to CO2-water Na-K ± Mg-chloride fluid with salinity of 5.7–10.0 wt % NaCl eq with temperatures decreasing from 360 to 230°C and variations in fO2, fS2, fSe2, and fTe2. Oxygen isotopy in quartz indicates mixing of magmatic fluid with meteoric water (δ18O of fluid from +3.5 to +7.1‰). The δ34SH2S values of the fluid from +7.1 to +5.2‰ suggest that some sulfur was extracted from the host rocks. Conclusions. According to mineralogical and geochemical peculiarities and conditions of formation of gold-sulfide-quartz veins from Kyzik-Chadr Au-Mo-Cu porphyry deposit can be attributed to epithermal Au-Ag veins of intermediate sulfidation type, which are the product of a single porphyry-epithermal ore-magmatic system in the Kyzik-Chadr ore field.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>самородное золото</kwd><kwd>Au-Mo-Cu-порфировые месторождения</kwd><kwd>Au-Ag эпитермальное оруденение</kwd><kwd>теллуриды Au-Ag</kwd><kwd>кварц</kwd><kwd>флюидные включения</kwd><kwd>стабильные изотопы</kwd><kwd>Тува</kwd></kwd-group><kwd-group xml:lang="en"><kwd>native gold</kwd><kwd>Au-Mo-Cu-porphyry deposits</kwd><kwd>Au-Ag epithermal mineralization</kwd><kwd>Au-Ag tellurides</kwd><kwd>quartz</kwd><kwd>fluid inclusions</kwd><kwd>stable isotopes</kwd><kwd>Tuva</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Исследование выполнено при финансовой поддержке Российского научного фонда (проект № 23-27-00344, https://rscf.ru/project/23-27-00344/)</funding-statement><funding-statement xml:lang="en">The study is supported by the Russian Science Foundation (project No. 23-27-00344, https://rscf.ru/project/23-27-00344/)</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">Андреев А.В., Гирфанов М.М., Старостин И.А., Авилова О.В., Кряжев С.Г., Юрмазов Д.Н., Бабкин И.А., Семенов М.И. 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