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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">Geotectonics</journal-id><journal-title-group><journal-title xml:lang="en">Geotectonics</journal-title><trans-title-group xml:lang="ru"><trans-title>Геотектоника</trans-title></trans-title-group></journal-title-group><issn publication-format="print">0016-853X</issn><issn publication-format="electronic">3034-4972</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">660399</article-id><article-id pub-id-type="doi">10.31857/S0016853X24050024</article-id><article-id pub-id-type="edn">EFXCYW</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">Structural Connection of the Chukchi Borderland and the Chukchi Sea Shelf: 3D Geophysical Modelling of the Earth Crust</article-title><trans-title-group xml:lang="ru"><trans-title>Структурная связь Чукотского бордерленда и шельфа Чукотского моря: геофизическое 3D-моделирование земной коры</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Piskarev</surname><given-names>A. L.</given-names></name><name xml:lang="ru"><surname>Пискарев</surname><given-names>А. Л.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>apiskarev@gmail.com</email><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Kireev</surname><given-names>A. A.</given-names></name><name xml:lang="ru"><surname>Киреев</surname><given-names>А. А.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>apiskarev@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Ovanesyan</surname><given-names>G. I.</given-names></name><name xml:lang="ru"><surname>Ованесян</surname><given-names>Г. И.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>apiskarev@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Poselov</surname><given-names>V. A.</given-names></name><name xml:lang="ru"><surname>Поселов</surname><given-names>В. А.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>apiskarev@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Savin</surname><given-names>V. A.</given-names></name><name xml:lang="ru"><surname>Савин</surname><given-names>В. А.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>apiskarev@gmail.com</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Smirnov</surname><given-names>O. E.</given-names></name><name xml:lang="ru"><surname>Смирнов</surname><given-names>О. Е.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>apiskarev@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Tabyrtsa</surname><given-names>S. N.</given-names></name><name xml:lang="ru"><surname>Табырца</surname><given-names>С. Н.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>apiskarev@gmail.com</email><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff2"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Gramberg All-Russia Research Institute of Geology and Mineral Resources of the World Ocean</institution></aff><aff><institution xml:lang="ru">Всероссийский научно-исследовательский институт геологии и минеральных ресурсов Мирового Океана им. акад. И.С. Грамберга</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Saint Petersburg State University</institution></aff><aff><institution xml:lang="ru">Санкт-Петербургский государственный университет</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2024-10-15" publication-format="electronic"><day>15</day><month>10</month><year>2024</year></pub-date><issue>5</issue><fpage>28</fpage><lpage>45</lpage><history><date date-type="received" iso-8601-date="2025-02-22"><day>22</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/0016-853X/article/view/660399">https://journals.eco-vector.com/0016-853X/article/view/660399</self-uri><abstract xml:lang="en"><p>A 3D model of the crustal structure of the region, which includes the Chukchi Borderland with the adjacent ocean and the Chukotka‒Alaska Shelf, has been compiled and calculated. The peculiarity of the crustal structure is the three-sided isolation of the Chukchi Borderland and presence of a transitional area from the south connecting the Chukchi Borderland with the Chukotka‒Alaska Shelf. The connection between the Chukchi Borderland and the Wrangel Rise of the Chukchi Shelf is traced through the North Chukchi Rise located between the North Chukchi Trough and the Hanna Trough. A clockwise rotation of the Chukchi Borderland began in the Early Cretaceous, because basalts at the bottom of the sedimentary strata sections along the eastern and southern boundaries of the Chukchi Basin have a reversed magnetization, i.e., their outpouring occurred before the beginning of the Cretaceous superchron, earlier than 121 Ma. Near the upper boundary of the Neocomian, there was a large-scale shear displacement of crustal blocks along the eastern boundary of the Chukchi Rise, which had a thrust pattern before that. The 3D model demonstrates that the Chukchi Borderland and the Chukchi Basin are the natural components of the continental margin, as they have a strong geological connection with the continental masses of the Chukchi Shelf.</p></abstract><trans-abstract xml:lang="ru"><p>Авторами составлена и рассчитана 3D-модель строения земной коры региона, охватывающего Чукотский бордерленд с прилегающими океаническими акваториями и Чукотско-Аляскинским шельфом. Особенностью строения земной коры региона является трехсторонняя обособленность Чукотского бордерленда и наличие переходной области на юге, связывающей бордерленд с Чукотско-Аляскинским шельфом. Прослежена связь между Чукотским бордерлендом и Врангелевским поднятием шельфа Чукотского моря через Северо-Чукотское поднятие, расположенное между Северо-Чукотским прогибом и прогибом Ханна. Отодвигание Чукотского бордерленда с поворотом по часовой стрелке началось с раннемелового времени, так как базальты, залегающие в низах разрезов осадочных толщ вдоль восточной и южной границ Чукотской котловины, имеют обратную намагниченность, т.е. их излияние происходило до начала мелового суперхрона, ~121 млн лет назад. Вблизи верхней границы неокома происходило масштабное сдвиговое перемещение блоков земной коры вдоль восточной границы Чукотского поднятия, имевшей до того надвиговый характер. Данные проведенного геофизического 3D-моделирования показывают, что Чукотский бордерленд и Чукотская котловина являются структурными элементами континентальной окраины, так как имеют тесную геологическую связь с континентальным шельфом Чукотского моря.</p></trans-abstract><kwd-group xml:lang="en"><kwd>Chukchi Borderland</kwd><kwd>Chukotka-Alaska shelf</kwd><kwd>seismic survey</kwd><kwd>gravity and magnetic anomalies</kwd><kwd>3D geophysical model</kwd><kwd>Earth’s crust</kwd><kwd>tectonics</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>Чукотский бордерленд</kwd><kwd>Чукотско-Аляскинский шельф</kwd><kwd>сейсморазведка</kwd><kwd>гравитационные и магнитные аномалии</kwd><kwd>геофизическое 3D моделирование</kwd><kwd>земная кора</kwd><kwd>тектоника</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Арктический бассейн (геология и морфология). – Под ред. В.Д. 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