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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">geolmsu</journal-id><journal-title-group><journal-title xml:lang="ru">ВЕСТНИК МОСКОВСКОГО УНИВЕРСИТЕТА. СЕРИЯ 4. ГЕОЛОГИЯ</journal-title><trans-title-group xml:lang="en"><trans-title>Moscow University Bulletin. Series 4. Geology</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">0579-9406</issn><publisher><publisher-name>Издательский Дом МГУ</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.55959/MSU0579-9406-4-2023-63-6-67-76</article-id><article-id custom-type="elpub" pub-id-type="custom">geolmsu-642</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></article-categories><title-group><article-title>Радиоактивность поверхностных донных осадков Чаунской губы. Анализ природных и антропогенных факторов</article-title><trans-title-group xml:lang="en"><trans-title>Radioactivity of surface marine sediments of the Chaun Bay. Analysis of natural and anthropogenic environmental factors</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-2230-1069</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Ульянцев</surname><given-names>А С.</given-names></name><name name-style="western" xml:lang="en"><surname>Ulyantsev</surname><given-names>A. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Александр Сергеевич Ульянцев</p><p>Москва</p></bio><bio xml:lang="en"><p>Aleksandr S. Ulyantsev</p><p>Moscow</p></bio><email xlink:type="simple">uleg85@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-5889-3409</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Иванников</surname><given-names>С. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Ivannikov</surname><given-names>S. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Сергей Игоревич Иванников</p><p>Владивосток</p></bio><bio xml:lang="en"><p>Sergey I. Ivannikov</p><p>Vladivostok</p></bio><email xlink:type="simple">yajkfqn@mail.ru</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-4954-0422</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Братская</surname><given-names>С. Ю.</given-names></name><name name-style="western" xml:lang="en"><surname>Bratskaya</surname><given-names>S. Yu.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Светлана Юрьевна Братская</p><p>Владивосток</p></bio><bio xml:lang="en"><p>Svetlana Yu. Bratskaya</p><p>Vladivostok</p></bio><email xlink:type="simple">s.bratskaya@gmail.com</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-9273-9950</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Чаркин</surname><given-names>А. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Charkin</surname><given-names>A. N.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Александр Николаевич Чаркин</p><p>Владивосток</p></bio><bio xml:lang="en"><p>Aleksandr N. Charkin</p><p>Vladivostok</p></bio><email xlink:type="simple">charkin@poi.dvo.ru</email><xref ref-type="aff" rid="aff-3"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Институт океанологии им. П.П. Ширшова РАН</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Shirshov Institute of Oceanology</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Институт химии ДВО РАН</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Institute of Chemistry, Far Eastern Branch of the RAS</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-3"><aff xml:lang="ru"><institution>Тихоокеанский океанологический институт им. В.И. Ильичева ДВО РАН</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Il’ichev Pacific Oceanological Institute, Far Eastern Branch of the RAS</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2023</year></pub-date><pub-date pub-type="epub"><day>11</day><month>02</month><year>2024</year></pub-date><volume>0</volume><issue>6</issue><fpage>67</fpage><lpage>76</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Ульянцев А.С., Иванников С.И., Братская С.Ю., Чаркин А.Н., 2024</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="ru">Ульянцев А.С., Иванников С.И., Братская С.Ю., Чаркин А.Н.</copyright-holder><copyright-holder xml:lang="en">Ulyantsev A.S., Ivannikov S.I., Bratskaya S.Y., Charkin A.N.</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://vestnik.geol.msu.ru/jour/article/view/642">https://vestnik.geol.msu.ru/jour/article/view/642</self-uri><abstract><p>   В статье представлены данные о пространственном распределении активной концентрации природных (232Th, 226Ra, 40K) и техногенных (137Cs) радионуклидов в поверхностном слое донных осадков Чаунской губы Восточно-Сибирского моря. Измеренная активная концентрация 232Th и 226Ra типична для донных отложений прибрежно-шельфовой зоны Арктики и соответствует общемировому уровню. Уровень активности 137Cs в донных отложениях показал отсутствие локальных источников антропогенного загрязнения в Чаунской губе, в то время как средняя концентрация активности 40K в 1,8 раза превышала общемировую. Результаты статистического анализа полученных данных показали, что динамика речного стока, термоабразии и течений, а также эолового и ледового переноса осадочного вещества, являются основными факторами, определившими различия в поведении исследованных радионуклидов в поверхностных донных осадках Чаунской губы.</p></abstract><trans-abstract xml:lang="en"><p>   The paper presents data on the spatial distribution of activity concentration of natural (232Th, 226Ra, 40K) and anthropogenic (137Cs) radionuclides in the surface layer of bottom sediments of the Chaun Bay of the East Siberian Sea. The measured activity of 232Th and 226Ra is typical for bottom sediments of the Arctic coastal zone and corresponds to the global level. The level of 137Cs activity in bottom sediments showed the absence of local sources of anthropogenic contamination in Chaun Bay, while the mean 40K activity concentration was 1.8 times higher than the global average. The results of statistical analysis showed that the dynamics of riverine run-off, thermoabrasion and currents, as well as aeolian and sea ice transport of sedimentary matter, are the main factors that determined the differences in the behaviour of the studied radionuclides in the surface bottom sediments of the Chaun Bay.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>Арктика</kwd><kwd>морские осадки</kwd><kwd>гамма-спектрометрия</kwd><kwd>природные радионуклиды</kwd><kwd>радиоцезий</kwd><kwd>факторный анализ</kwd></kwd-group><kwd-group xml:lang="en"><kwd>Arctic</kwd><kwd>marine sediments</kwd><kwd>gamma-ray spectrometry</kwd><kwd>natural radionuclides</kwd><kwd>radiocesium</kwd><kwd>factor analysis</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Исследование выполнено при финансовой поддержке РНФ (проект № 19-77-10044). Финансирование экспедиции осуществлялось в рамках Государственного задания ИО РАН (тема № FMWE-2024-0019)</funding-statement><funding-statement xml:lang="en">Research completed with financial support from the Russian Science Foundation (project No. 19-77-10044). The expedition was financed within the framework of the State assignment of the Institute of Oceanology of the Russian Academy of Sciences (Topic No. FMWE-2024-0019)</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">Доманов М.М., Амбросимов А.К., Новичкова Е.А. Особенности распределения &lt;sup&gt;226&lt;/sup&gt;Ra, &lt;sup&gt;238&lt;/sup&gt;U и &lt;sup&gt;232&lt;/sup&gt;Th в поверхностном слое морских осадков в условиях активной биоседиментации в зоне арктического фронта // Радиохимия. 2019. Т. 61, № 5. 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