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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">gtcrust</journal-id><journal-title-group><journal-title xml:lang="ru">Геодинамика и тектонофизика</journal-title><trans-title-group xml:lang="en"><trans-title>Geodynamics &amp; Tectonophysics</trans-title></trans-title-group></journal-title-group><issn pub-type="epub">2078-502X</issn><publisher><publisher-name>Institute of the Earth's crust of the Russian Academy of Sciences, Siberian Branch</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.5800/GT-2022-13-2s-0621</article-id><article-id custom-type="elpub" pub-id-type="custom">gtcrust-1390</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>СОВРЕМЕННАЯ ГЕОДИНАМИКА</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>RECENT GEODYNAMICS</subject></subj-group></article-categories><title-group><article-title>ГЕОРАДИОЛОКАЦИЯ И ДПЛА АЭРОФОТОСЪЕМКА ПРИ ГЕОКРИОЛОГИЧЕСКИХ ИССЛЕДОВАНИЯХ НА ОКИНСКОМ ПЛОСКОГОРЬЕ В ВОСТОЧНЫХ САЯНАХ</article-title><trans-title-group xml:lang="en"><trans-title>GPR surveys and RPA aerial photography using in conducting geocryological studies on the Oka plateau in the Eastern Sayan ridge</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-3853-5022</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Алексеев</surname><given-names>C. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Alexeev</surname><given-names>S. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p> 664033, Иркутск, ул. Лермонтова, 128, Россия </p></bio><bio xml:lang="en"><p> 128 Lermontov St, Irkutsk 664033, Russia </p></bio><email xlink:type="simple">salex@crust.irk.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-7744-8979</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Гладков</surname><given-names>А. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Gladkov</surname><given-names>A. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p> 664033, Иркутск, ул. Лермонтова, 128, Россия </p></bio><bio xml:lang="en"><p> 128 Lermontov St, Irkutsk 664033, Russia </p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-2181-5594</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Пеллинен</surname><given-names>В. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Pellinen</surname><given-names>V. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p> 664033, Иркутск, ул. Лермонтова, 128, Россия </p></bio><bio xml:lang="en"><p> 128 Lermontov St, Irkutsk 664033, Russia </p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-5687-4143</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Алексеева</surname><given-names>Л. П.</given-names></name><name name-style="western" xml:lang="en"><surname>Alexeeva</surname><given-names>L. P.</given-names></name></name-alternatives><bio xml:lang="ru"><p> 664033, Иркутск, ул. Лермонтова, 128, Россия </p></bio><bio xml:lang="en"><p> 128 Lermontov St, Irkutsk 664033, Russia </p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-2002-4790</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Светлаков</surname><given-names>А. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Svetlakov</surname><given-names>A. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p> 664033, Иркутск, ул. Лермонтова, 128, Россия </p></bio><bio xml:lang="en"><p> 128 Lermontov St, Irkutsk 664033, Russia </p></bio><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Институт земной коры СО РАН</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Institute of the Earth’s Crust, Siberian Branch of the Russian Academy of Sciences</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2022</year></pub-date><pub-date pub-type="epub"><day>21</day><month>01</month><year>2022</year></pub-date><volume>13</volume><issue>2</issue><fpage>621</fpage><lpage>621</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Алексеев C.В., Гладков А.С., Пеллинен В.А., Алексеева Л.П., Светлаков А.А., 2022</copyright-statement><copyright-year>2022</copyright-year><copyright-holder xml:lang="ru">Алексеев C.В., Гладков А.С., Пеллинен В.А., Алексеева Л.П., Светлаков А.А.</copyright-holder><copyright-holder xml:lang="en">Alexeev S.V., Gladkov A.S., Pellinen V.A., Alexeeva L.P., Svetlakov A.A.</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.gt-crust.ru/jour/article/view/1390">https://www.gt-crust.ru/jour/article/view/1390</self-uri><abstract><p>В работе представлены результаты георадиолокационных исследований многолетнемерзлых пород и аэрофотосъемки, выполненных на ключевых участках в долине р. Сенца (Окинское плоскогорье, Восточные Саяны).</p><p>При геофизических исследованиях использовался георадар ОКО-2 в комплекте с экранированным антенным блоком АБ-90, максимальной глубиной зондирования до 20 м и разрешающей способностью 0.5 м. Для учета высотных отметок местности тахеометром Trimble TS635 и дальномером Leiсa DISTO D 510 выполнены гипсометрические измерения с шагом 1.0 м. Аэрофотосъемка проведена дистанционным пилотируемым летательным аппаратом DJI Inspire 1 pro, оснащенным фотокамерой Zenmuse 3X (разрешение 3840×2160 пикселей) с пространственным разрешением 5.7–7.8 см/пиксель (в разные годы).</p><p>В строении мерзлых озерно-аллювиальных отложений выделены три георадарных комплекса, соответствующих слою сезонного оттаивания и мерзлым породам с различным количеством шлиров, линз и прослоев текстурообразующих льдов. Анализ ортофотоплана местности и результатов тахеометрической съемки показал, что разрушение бугров пучения происходит со второй половины апреля до первой половины октября. Наибольшее изменение морфологии рельефа обусловлено оттаиванием льдистых пылеватых суглинков, что приводит к формированию блоков отседания в уступе террасы р. Сенца. Боковая термоэрозия р. Сенца также способствует разрушению бугров пучения.</p></abstract><trans-abstract xml:lang="en"><p>The results of ground-penetrating radar (GPR) studies of permafrost and aerial photography, carried out at key sites in the Sentsa River valley (Oka Plateau, Eastern Sayan Ridge), are presented.</p><p>For geophysical studies, an OKO-2 GPR completed with an AB-90 shielded antenna unit was used with a maximum sounding depth of up to 20 m and a resolution of 0.5 m. To account for the landscape elevation, the Trimble TS635 tacheometer and the Leiсa DISTO D 510 rangefinder performed hypsometric measurements with a step of 1.0 m. Aerial photography was carried out by a remotely piloted aircraft (RPA) DJI Inspire 1 Pro, equipped with a Zenmuse 3X camera (a resolution of 3840×2160 pixels) with a spatial resolution of 5.7–7.8 cm/pixel (in different years).</p><p>In the structure of frozen lacustrine-alluvial sediments, three GPR complexes are distinguished, corresponding to the active layer and frozen rocks with different amounts of schlieren, lenses and layers of texture-forming ice. The orthophoto map and tacheometric survey analysis showed that the destruction of frost mounds occurs from the second half of April to the first half of October. The most significant relief change is due to the thawing of icy pulverescent clayey silts. It leads to subsidence blocks in the ledge of the Sentsa River terrace. Lateral river thermoerosion also contributes to the frost mounds destruction.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>горная криолитозона</kwd><kwd>многолетнемерзлые породы</kwd><kwd>бугры пучения</kwd><kwd>сезонно-талый слой</kwd><kwd>текстурообразующие льды</kwd><kwd>георадиолокация</kwd><kwd>радарограмма</kwd><kwd>ДПЛА</kwd><kwd>аэрофотосъемка</kwd><kwd>тахеометр</kwd></kwd-group><kwd-group xml:lang="en"><kwd>mountain permafrost</kwd><kwd>frost mounds</kwd><kwd>active layer</kwd><kwd>structure-forming ice</kwd><kwd>ground-penetrating radar</kwd><kwd>radarogram</kwd><kwd>RPA</kwd><kwd>aerial photography</kwd><kwd>tacheometer</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Работы выполнены при финансовой поддержке РФФИ в рамках научного проекта № 20- 45-380002 «Криолитозона Восточных Саян: основные параметры и голоценовая эволюция», использовалось оборудование ЦКП «Геодинамика и геохронология» ИЗК СО РАН (грант № 075-15-2021-682).</funding-statement><funding-statement xml:lang="en">The work was carried out with the financial support of the Russian Foundation for Basic Research within the framework of the scientific project 20-45-380002 «Cryolithozone of the Eastern Sayan Ridge: main parameters and Holocene evolution», equipment of the Center for Geodynamics and Geochronology (grant 075-15-2021-682).</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">Алексеев С.В., Алексеева Л.П., Светлаков А.А., Козырева Е.А., Васильчук Ю.К. 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