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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">Litologiâ i poleznye iskopaemye</journal-id><journal-title-group><journal-title xml:lang="en">Litologiâ i poleznye iskopaemye</journal-title><trans-title-group xml:lang="ru"><trans-title>Литология и полезные ископаемые</trans-title></trans-title-group></journal-title-group><issn publication-format="print">0024-497X</issn><issn publication-format="electronic">3034-5375</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">658538</article-id><article-id pub-id-type="doi">10.31857/S0024497X24020021</article-id><article-id pub-id-type="edn">zbzuks</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Articles</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Статьи</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">Change of solution composition during it migration through the sedimentary cover in the center of the modern hydrothermal system (Juan de Fuca Ridge, Pacific Ocean, Hole ODP 858B)</article-title><trans-title-group xml:lang="ru"><trans-title>Изменение состава раствора при его прохождении через осадочный покров в центре современной гидротермальной системы (хребет Хуан де Фука, Тихий океан, скважина ODP 858В)</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Kurnosov</surname><given-names>V. B.</given-names></name><name xml:lang="ru"><surname>Курносов</surname><given-names>В. Б.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>vic-kurnosov@rambler.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Konovalov</surname><given-names>Yu. I.</given-names></name><name xml:lang="ru"><surname>Коновалов</surname><given-names>Ю. И.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>vic-kurnosov@rambler.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Okina</surname><given-names>O. I.</given-names></name><name xml:lang="ru"><surname>Окина</surname><given-names>О. И.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>vic-kurnosov@rambler.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Galin</surname><given-names>K. R.</given-names></name><name xml:lang="ru"><surname>Галин</surname><given-names>К. Р.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>vic-kurnosov@rambler.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Geological Institute of the RAS</institution></aff><aff><institution xml:lang="ru">Геологический институт РАН</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2024-07-06" publication-format="electronic"><day>06</day><month>07</month><year>2024</year></pub-date><issue>2</issue><fpage>163</fpage><lpage>179</lpage><history><date date-type="received" iso-8601-date="2025-02-20"><day>20</day><month>02</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/0024-497X/article/view/658538">https://journals.eco-vector.com/0024-497X/article/view/658538</self-uri><abstract xml:lang="en"><p>The article presents the results of studying the change of the composition of the hydrothermal solution during its migration through the Pleistocene sediments from the Hole ODP 858B 38.6 m deep, which was drilled in the northern segment of the Middle Valley of the Juan de Fuca Ridge, in the Dead Dog hydrothermal field, in 20 m from the hydrothermal source with temperature 276°C. The influence of sediments of the Units I, IIB, IID from this hole on the change in the composition of the solution during the solution-sediment interaction has been established. The greatest influence on the composition of the solution occurred during its interaction with the sediments of the Units IIB and IID under high-temperature conditions (200–350°C), which is expressed in the enrichment of the solution with a large amount of chemical elements. A possible change in the composition of the solution is shown in the process of solution-sediment interaction during its migration through the entire sedimentary cover with a thickness of 250–300 m.</p></abstract><trans-abstract xml:lang="ru"><p>В статье приведены результаты изучения изменения состава гидротермального раствора при его прохождении через плейстоценовые осадки из скважины ODP 858В глубиной 38.6 м, которая пробурена в северном сегменте Срединной Долины хребта Хуан де Фука, на гидротермальном поле “Dead Dog”, в 20 м от гидротермального источника с температурой 276°C. Установлено влияние осадков Толщ I, IIB, IID из этой скважины на изменение состава раствора в процессе взаимодействия раствор–осадки. Наибольшее влияние на состав раствора произошло при его взаимодействии с осадками Толщ IIB и IID в высокотемпературных условиях (200–350°C), которое выражено в обогащении раствора большим количеством химических элементов. Показано возможное изменение состава раствора в процессе взаимодействия раствор–осадки при его прохождении через весь осадочный покров мощностью 250–300 м.</p></trans-abstract><kwd-group xml:lang="en"><kwd>oceanic hydrothermal system</kwd><kwd>Juan de Fuca Ridge</kwd><kwd>change of solution composition</kwd><kwd>solution-sediment interaction</kwd><kwd>deep-sea drilling</kwd><kwd>hydrothermal source</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>океанская гидротермальная система</kwd><kwd>хребет Хуан де Фука</kwd><kwd>изменение состава раствора</kwd><kwd>взаимодействие раствор–осадки</kwd><kwd>глубоководное бурение</kwd><kwd>гидротермальные источники</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">Government of the Russian Federation</institution></institution-wrap></funding-source><award-id>АААА-А19-119020490093-6</award-id></award-group></funding-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Блинова Е. 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