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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">10.21285/2686-9993-2020-43-2-160-176</article-id><article-id custom-type="elpub" pub-id-type="custom">nznistu-101</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>Минералого-петрографическая характеристика месторождения Угахан</article-title><trans-title-group xml:lang="en"><trans-title>Mineralogical and petrographic characteristics of the Ugahan deposit</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>Блинов</surname><given-names>А. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Blinov</surname><given-names>A. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>младший научный сотрудник лаборатории геохимии рудообразования и геохимических методов поисков</p><p>664033, г. Иркутск, ул. Фаворского, 1a, Россия</p></bio><bio xml:lang="en"><p>Junior Researcher, Laboratory of Ore Formation Geochemistry and Geochemical Prospecting Methods</p><p>1a Favorsky St., Irkutsk 664033, Russia</p></bio><email xlink:type="simple">belor_cool@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>Тарасова</surname><given-names>Ю. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Tarasova</surname><given-names>J. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>кандидат геолого-минералогических наук, старший научный сотрудник лаборатории геохимии рудообразования и геохимических методов поисков; научный сотрудник</p><p>664033, г. Иркутск, ул. Фаворского, 1a, Россия</p><p>664033, г. Иркутск, ул. Лермонтова, 134, Россия</p></bio><bio xml:lang="en"><p>Cand. Sci. (Geol. &amp; Mineral.), Senior Researcher, Laboratory of Ore Formation Geochemistry and Geochemical Prospecting Methods; Researcher,</p><p>1a Favorsky St., Irkutsk 664033, Russia</p><p>134 Lermontov St., Irkutsk 664033, Russia</p></bio><email xlink:type="simple">j.tarasova84@yandex.ru</email><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru">Институт геохимии им. А.П. Виноградова СО РАН<country>Россия</country></aff><aff xml:lang="en">Vinogradov Institute of Geochemistry, SB RAS<country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru">Институт геохимии им. А.П. Виноградова СО РАН; Иркутский научный центр СО РАН<country>Россия</country></aff><aff xml:lang="en">Vinogradov Institute of Geochemistry, SB RAS; Irkutsk Scientific Center, SB RAS<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>160</fpage><lpage>176</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Блинов А.В., Тарасова Ю.И., 2020</copyright-statement><copyright-year>2020</copyright-year><copyright-holder xml:lang="ru">Блинов А.В., Тарасова Ю.И.</copyright-holder><copyright-holder xml:lang="en">Blinov A.V., Tarasova J.I.</copyright-holder><license 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/101">https://www.nznj.ru/jour/article/view/101</self-uri><abstract><p>В статье рассмотрены минералого-петрографические и геохимические характеристики золоторудного месторождения Угахан с целью создания схемы формирования минералогических ассоциаций, вписанной в общую геодинамическую эволюцию Бодайбинского региона. Исследования проведены на основе авторского материала, полученного на месторождении Угахан во время полевых работ. Непосредственно минералого-петрографические и аналитические работы выполнены в Центре коллективного пользования «Изотопно-геохимических исследований» Института геохимии им. А.П. Виноградова СО РАН. По минералого-петрографическим исследованиям установлены три генерации карбонатных минералов, образованные в разное время и связанные с различными этапами формирования месторождения. В пределах месторождения повсеместно отмечается развитие агрегатов регенерационного кварца. Особенно масштабно данное явление наблюдается в верхних пачках бужуихтинской свиты, сложенных кварцевыми песчаниками. Развитие минеральных ассоциаций на месторождении происходило в следующем порядке: на ранней низкотемпературной стадии формировался фрамбоидальный и мелкий идиоморфный пирит (I и II), позже развивалась ассоциация высокотемпературных минералов, включающая арсенопирит, пирротин, пирит-III, самородное золото, галенит, сфалерит, блеклые руды, на пострудной стадии происходила кристаллизация пирита-IV в кварц-карбонатной оторочке. Аналогичная последовательность образования минеральных ассоциаций наблюдается на месторождениях Красный и Сухой Лог, что позволяет предполагать формирование рудной минерализации месторождений сухоложского типа в результате сходных рудообразующих процессов. Приуроченность месторождения Угахан к бужуихтинской свите позволяет считать данное стратиграфическое подразделение перспективным для дальнейших поисков в нем месторождений золота. Содержание мышьяка в отложениях бужуихтинской свиты как основного сопутствующего золоту элемента в пределах Бодайбинского региона на порядок ниже, что предполагает его исключение из поисковых характеристик в границах данного стратоуровня.</p></abstract><trans-abstract xml:lang="en"><p>The article considers the mineralogical-petrographic and geochemical characteristics of the Ugahan gold ore deposit with the aim of creating a scheme of the mineralogical associations’ formation that is inscribed in the general geodynamic evolution of the Bodaibo region. The study has been carried out on the copyright material obtained in the research area during the fieldwork. The mineralogical-petrographic and analytical work has been carried out at the Research Sharing Center “Isotope-geochemical studies” of Vinogradov Institute of Geochemistry, the Siberian Branch of the Russian Academy of Sciences. The mineralogical and petrographic research has identified three generations of carbonate minerals, formed at different times and associated with different stages of the field formation. Within the deposit, the development of the regenerative quartz aggregates is widely observed. The phenomenon is especially widespread in the upper members of the Buzhuikhta formation that are composed of quartz sandstones. The development of the mineral associations in the deposit took place in the following order. At the early low-temperature stage, the framboid and small idiomorphic pyrite were formed (I and II). Later, the high-temperature minerals association developed, that included arsenopyrite, pyrrhotite, pyrite-III, native gold, galena, sphalerite, and gray copper ores. At the post-ore stage, the pyrite-IV crystallization in a quartz-carbonate rim occurred. A similar sequence of mineral association formation is observed at the Krasny and Sukhoy Log deposits, which suggests that the formation of ore mineralization of the Sukhoy Log type deposits is a result of similar ore-forming processes. The confinement of the Ugahan deposit to the Buzhuikhta formation allows us to consider this stratigraphic unit as promising in terms of further exploration for gold deposits. The content of arsenic (as the main gold-accompanying element in the Bodaibo region) in the deposits of the Buzhuikhta formation is an order of magnitude lower, which suggests that it should be excluded from the search characteristics within the boundaries of this stratigraphic level.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>золото</kwd><kwd>Бодайбинский регион</kwd><kwd>месторождение Угахан</kwd><kwd>минералогия</kwd><kwd>петрография</kwd><kwd>геохимия</kwd></kwd-group><kwd-group xml:lang="en"><kwd>gold</kwd><kwd>Bodaibo region</kwd><kwd>Ugahan deposit</kwd><kwd>mineralogy</kwd><kwd>petrography</kwd><kwd>geochemistry</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">Буряк В.А. Метаморфизм и рудообразование. М.: Недра, 1982. 256 с.</mixed-citation><mixed-citation xml:lang="en">Buryak VA. Metamorphism and ore formation. Moscow: Nedra; 1982. 256 p. 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