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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-2025-25-3-521-545</article-id><article-id custom-type="edn" pub-id-type="custom">EWFHUB</article-id><article-id custom-type="elpub" pub-id-type="custom">litosphere-2310</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>Типоморфные особенности минералов платиновой группы из аллювия Кытлымского платиноносного узла (Северный Урал), Россия</article-title><trans-title-group xml:lang="en"><trans-title>Typomorphic features of platinum group minerals from alluvium of the Kytlym platinum-bearing cluster (North Ural), Russia</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>Нестеренко</surname><given-names>Г. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Nesterenko</surname><given-names>G. 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 av., 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>Айриянц</surname><given-names>Е. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Airiyants</surname><given-names>E. 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 av., Novosibirsk 630090</p></bio><email xlink:type="simple">jenny@igm.nsc.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>Жмодик</surname><given-names>С. М.</given-names></name><name name-style="western" xml:lang="en"><surname>Zhmodik</surname><given-names>S. M.</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 av., 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>Белянин</surname><given-names>Д. К.</given-names></name><name name-style="western" xml:lang="en"><surname>Belyanin</surname><given-names>D. K.</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 av., 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>V.S. Sobolev Institute of Geology and Mineralogy, SB 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>15</day><month>07</month><year>2025</year></pub-date><volume>25</volume><issue>3</issue><fpage>521</fpage><lpage>545</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Нестеренко Г.В., Айриянц Е.В., Жмодик С.М., Белянин Д.К., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Нестеренко Г.В., Айриянц Е.В., Жмодик С.М., Белянин Д.К.</copyright-holder><copyright-holder xml:lang="en">Nesterenko G.V., Airiyants E.V., Zhmodik S.M., Belyanin D.K.</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/2310">https://www.lithosphere.ru/jour/article/view/2310</self-uri><abstract><sec><title>Объект исследования</title><p>Объект исследования. В статье изложены результаты комплексного изучения минералов платиновой группы из платиноносных аллювиальных россыпей р. Косьва, дренирующей Кытлымский концентрически-зональный ультрамафитовый массив (Северный Урал) и ее южного притока руч. Богатый Лог.</p></sec><sec><title>Материалы и методы</title><p>Материалы и методы. Материалы для исследования отобраны в 1990–1991 гг. в рамках выполнения хоздоговорных работ. Элементный состав и микротекстурные особенности минералов платиновой группы определялись с помощью рудной (AxioScope.A1) и сканирующей электронной (MIRA 3 LMU с системой микроанализа INCA Energy 450 XMax 80) микроскопии.</p></sec><sec><title>Результаты</title><p>Результаты. Установлено, что минералы платиновой группы в россыпях р. Косьва и руч. Богатый Лог представлены Pt-Fe(±Cu) сплавами с включениями Os-Ir-(Ru) интерметаллидов, лаурита, ирарсита. Для большинства зерен характерно постмагматическое метасоматическое преобразование, проявляющиеся в псевдоморфном замещении и формировании кайм тетраферроплатина–туламинитового состава. Среди вторичных минералов платиновой группы установлен неназванный – интерметаллид олова, родия, меди, палладия и платины (Rh,Cu,Pd,Pt)3Sn.</p></sec><sec><title>Выводы</title><p>Выводы. Коренными источниками платиноносных россыпей служат ультрамафитовые комплексы Кытлымского концентрически-зонального ультрамафитового массива, прежде всего хромититы из эродированных серпентинизированных дунитов. Зерна МПГ не несут следов интенсивного гипергенного химического преобразования и полностью наследуют состав платиновой минерализации коренных источников, питающих россыпи. Влияние промежуточных дочетвертичных коллекторов на формирование изученных платиноносных россыпей минимально.</p></sec></abstract><trans-abstract xml:lang="en"><sec><title>Research subject</title><p>Research subject. The article presents the results of an integrated study of platinum group minerals from platinum-bearing alluvial placers of the river Kosva, draining the Kytlym concentrically zonal ultramafic massif (Northern Urals) and its southern tributary stream Bogaty Log.</p></sec><sec><title>Materials and methods</title><p>Materials and methods. Materials were sampled during the fieldwork of 1990–1991. The chemical composition and structural and textural features of platinum group minerals were determined using ore (AxioScope.A1) and scanning electron (MIRA 3 LMU with an INCA Energy 450 XMax 80 microanalysis system) microscopy.</p></sec><sec><title>Results</title><p>Results. Platinum group minerals in placers of the river Kosva and stream Bogaty Log are represented by Pt-Fe(±Cu) alloys, which correspond to isoferroplatinum and ferroan platinum with inclusions of Os-Ir-(Ru) intermetallic compounds, laurite, and irarsite. Most grains of platinum group minerals were subject to postmagmatic alteration, which manifested itself in the formation of replacement rims of a tetraferroplatinum–thulaminite composition. Among the secondary platinum group minerals, the authors encountered a mineral phase – unnamed intermetallic compound of rhodium, copper, palladium, and tin (Rh,Cu,Pd,Pt)3Sn that has not been previously described in nature.</p></sec><sec><title>Conclusions</title><p>Conclusions. The main sources of platinum-bearing placers are ultramafic complexes of the Kytlym concentrically zonal ultramafic massif, primarily chromitites from eroded serpentinized dunites. The grains of platinum group minerals do not bear traces of hypergene chemical alteration and completely inherit the composition of platinum mineralization from the primary sources that feed the placers. The influence of intermediate pre-Quaternary reservoirs on the formation of the studied platinum placers is minimal.</p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>минералы платиновой группы</kwd><kwd>Северный Урал</kwd><kwd>Кытлымский концентрически-зональный ультрамафитовый массив</kwd><kwd>типоморфные особенности минералов</kwd></kwd-group><kwd-group xml:lang="en"><kwd>platinum group minerals</kwd><kwd>Northern Urals</kwd><kwd>Kytlym concentrically zoned ultramafic massif</kwd><kwd>typomorphic features of minerals</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Работа выполнена в рамках государственного задания ИГМ СО РАН (№ 122041400193-7) при финансовой поддежке Министерства науки и высшего образования РФ.</funding-statement><funding-statement xml:lang="en">The work was carried out within the framework of the state assignment of the Institute of Geology and Mineralogy, Siberian Branch, Russian Academy of Sciences (no. 122041400193-7).</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">Баранников А.Г. 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