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<article 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" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" article-type="research-article" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Vestnik of the Far East Branch of the Russian Academy of Sciences</journal-id><journal-title-group><journal-title xml:lang="en">Vestnik of the Far East Branch of the Russian Academy of Sciences</journal-title><trans-title-group xml:lang="ru"><trans-title>Вестник Дальневосточного отделения Российской академии наук</trans-title></trans-title-group></journal-title-group><issn publication-format="print">0869-7698</issn><publisher><publisher-name xml:lang="en">The Russian Academy of Sciences</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">685980</article-id><article-id pub-id-type="doi">10.31857/S0869769824050066</article-id><article-id pub-id-type="edn">HPOYWQ</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Earth and Environment Sciences</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Науки о Земле и окружающей среде</subject></subj-group><subj-group subj-group-type="article-type"><subject>Research Article</subject></subj-group></article-categories><title-group><article-title xml:lang="en">Geochemistry and nature of the protoliths of Triassic manganese-silicate rocks and silicate-magnetite ores of the Sikhote-Alin</article-title><trans-title-group xml:lang="ru"><trans-title>Геохимия и природа протолитов триасовых марганцево-силикатных пород и силикатно-магнетитовых руд Сихотэ-Алиня</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-4805-3833</contrib-id><name-alternatives><name xml:lang="en"><surname>Perevoznikova</surname><given-names>Elena V.</given-names></name><name xml:lang="ru"><surname>Перевозникова</surname><given-names>Елена Валериевна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Candidate of Sciences in Geology and Mineralogy, Senior Researcher</p></bio><bio xml:lang="ru"><p>кандидат геолого-минералогических наук, старший научный сотрудник</p></bio><email>elenavalper@yandex.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-5331-499X</contrib-id><name-alternatives><name xml:lang="en"><surname>Kazachenko</surname><given-names>Valentin T.</given-names></name><name xml:lang="ru"><surname>Казаченко</surname><given-names>Валентин Тимофеевич</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Doctor of Sciences in Geology and Mineralogy, Chief Researcher</p></bio><bio xml:lang="ru"><p>доктор геолого-минералогических наук, главный научный сотрудник</p></bio><email>vkazachenko@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Far East Geological Institute, FEB RAS</institution></aff><aff><institution xml:lang="ru">Дальневосточный геологический институт ДВО РАН</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2024-10-30" publication-format="electronic"><day>30</day><month>10</month><year>2024</year></pub-date><issue>5</issue><issue-title xml:lang="ru"/><fpage>83</fpage><lpage>102</lpage><history><date date-type="received" iso-8601-date="2025-06-26"><day>26</day><month>06</month><year>2025</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2024, Russian Academy of Sciences</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2024, Российская академия наук</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="en">Russian Academy of Sciences</copyright-holder><copyright-holder xml:lang="ru">Российская академия наук</copyright-holder></permissions><self-uri xlink:href="https://journals.eco-vector.com/0869-7698/article/view/685980">https://journals.eco-vector.com/0869-7698/article/view/685980</self-uri><abstract xml:lang="en"><p>The article is devoted to the issues of the origin of jaspers and contact-metamorphosed sediments – manganese silicate (composed mainly of Mn-silicates) rocks and silicate-magnetite ores composing stratum and lenticular bodies in the Triassic chert formation of the Sikhote-Alin. Chemostratigraphy methods were used to prove the chemogenic-biogenic nature of the initial deposits – protoliths of these formations. The article presents a large volume of geochemical (<sup>143</sup>Nd/<sup>144</sup>Nd, REE) data for manganese silicate rocks, silicate-magnetite ores and jaspers of the Taukha and Samarka terranes. The present-day paired values of Sm/Nd and <sup>143</sup>Nd/<sup>144</sup>Nd for seawater of the Triassic-Jurassic period, obtained from the study of siliceous and manganese silicate rocks, as well as silicate-magnetite ores and presented as an isochron in the diagram Sm/Nd–<sup>143</sup>Nd/<sup>144</sup>Nd, can be used to solve other important geological problems of the Sikhote-Alin.</p></abstract><trans-abstract xml:lang="ru"><p>Статья посвящена вопросам происхождения яшм и контактово-метаморфизованных осадков – марганцево-силикатных пород (сложенных главным образом силикатами Mn) и силикатно-магнетитовых руд, слагающих пластовые и линзовидные тела в триасовой кремневой формации Сихотэ-Алиня. Для доказательства хемогенно-биогенной природы исходных отложений – протолитов этих образований были использованы методы хемостратиграфии. Приводится большой объем геохимических (<sup>143</sup>Nd/<sup>144</sup>Nd, REE) данных для марганцево-силикатных пород, силикатно-магнетитовых руд и яшм Таухинского и Самаркинского террейнов. Приведенные в статье современные парные значения Sm/Nd и<sup> 143</sup>Nd/<sup>144</sup>Nd для морской воды триасово-юрского времени, полученные по результатам изучения кремнистых и марганцево-силикатных пород, а также силикатно-магнетитовых руд и представленные в виде изохроны на диаграмме Sm/Nd–<sup>143</sup>Nd/<sup>144</sup>Nd, могут быть использованы для решения других важных геологических проблем Сихотэ-Алиня.</p></trans-abstract><kwd-group xml:lang="en"><kwd>metalliferous sediments</kwd><kwd>jaspers</kwd><kwd>manganese-silicate rocks</kwd><kwd>silicate-magnetite ores</kwd><kwd>Triassic</kwd><kwd>Sikhote-Alin</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>металлоносные осадки</kwd><kwd>яшмы</kwd><kwd>марганцево-силикатные породы</kwd><kwd>силикатно-магнетитовые руды</kwd><kwd>триас</kwd><kwd>Сихотэ-Алинь</kwd></kwd-group><funding-group><award-group><funding-source><institution-wrap><institution xml:lang="ru">Правительство РФ</institution></institution-wrap><institution-wrap><institution xml:lang="en">The Russian Government</institution></institution-wrap></funding-source></award-group></funding-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><citation-alternatives><mixed-citation xml:lang="en">Volokhin Yu.G., Karabtsov A. 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