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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">Geomorfologiâ i paleogeografiâ</journal-id><journal-title-group><journal-title xml:lang="en">Geomorfologiâ i paleogeografiâ</journal-title><trans-title-group xml:lang="ru"><trans-title>Геоморфология и палеогеография</trans-title></trans-title-group></journal-title-group><issn publication-format="print">2949-1789</issn><issn publication-format="electronic">2949-1797</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">660709</article-id><article-id pub-id-type="doi">10.31857/S2949178924030039</article-id><article-id pub-id-type="edn">PMDUGC</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Glacial Geomorphology</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Гляциальная геоморфология</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">Experience of applying the cosmogenic dating method (<sup>10</sup>Be) to assess the age and scale of the Pleistocene Glaciation in North-Eastern Siberia (based on the example of glacier complexes of the Chersky Ridge)</article-title><trans-title-group xml:lang="ru"><trans-title>Опыт применения метода датирования по космогенному <sup>10</sup>Be для оценки возраста и масштабов плейстоценового оледенения северо-восточной Сибири (на примере ледниковых комплексов хр. Черского)</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Arzhannikov</surname><given-names>S. G.</given-names></name><name xml:lang="ru"><surname>Аржанников</surname><given-names>С. Г.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>sarzhan@crust.irk.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Arzhannikova</surname><given-names>A. V.</given-names></name><name xml:lang="ru"><surname>Аржанникова</surname><given-names>А. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>sarzhan@crust.irk.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Chebotarev</surname><given-names>A. A.</given-names></name><name xml:lang="ru"><surname>Чеботарев</surname><given-names>А. А.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>sarzhan@crust.irk.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Torgovkin</surname><given-names>N. V.</given-names></name><name xml:lang="ru"><surname>Торговкин</surname><given-names>Н. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>sarzhan@crust.irk.ru</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Semikolennykh</surname><given-names>D. V.</given-names></name><name xml:lang="ru"><surname>Семиколенных</surname><given-names>Д. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>sarzhan@crust.irk.ru</email><xref ref-type="aff" rid="aff3"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Lukyanycheva</surname><given-names>M. S.</given-names></name><name xml:lang="ru"><surname>Лукьянычева</surname><given-names>М. С.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>sarzhan@crust.irk.ru</email><xref ref-type="aff" rid="aff4"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Kurbanov</surname><given-names>R. N.</given-names></name><name xml:lang="ru"><surname>Курбанов</surname><given-names>Р. Н.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>sarzhan@crust.irk.ru</email><xref ref-type="aff" rid="aff3"/><xref ref-type="aff" rid="aff4"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Institute of the Earth’s Crust of the SB RAS</institution></aff><aff><institution xml:lang="ru">Институт земной коры СО РАН</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Institute of Permafrost Science of the SB RAS</institution></aff><aff><institution xml:lang="ru">Институт мерзлотоведения СО РАН</institution></aff></aff-alternatives><aff-alternatives id="aff3"><aff><institution xml:lang="en">Lomonosov Moscow State University</institution></aff><aff><institution xml:lang="ru">Московский государственный университет имени М.В. Ломоносова</institution></aff></aff-alternatives><aff-alternatives id="aff4"><aff><institution xml:lang="en">Institute of Geography of the RAS</institution></aff><aff><institution xml:lang="ru">Институт географии РАН</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><volume>55</volume><issue>3</issue><fpage>53</fpage><lpage>72</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><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/" start_date="2026-01-10"/></permissions><self-uri xlink:href="https://journals.eco-vector.com/2949-1789/article/view/660709">https://journals.eco-vector.com/2949-1789/article/view/660709</self-uri><abstract xml:lang="en"><p>The history of studying glacial complexes in North-Eastern Siberia goes back more than 150 years. During this period, extensive geological and geomorphological features were obtained, which made it possible to determine the stages, nature and extent of glaciations. At the same time, the lack of direct dating of the glacial relief obtained by geochronological methods does not allow for full-fledged paleogeographic reconstructions. This leads to discussions in both Russian and English literature about the possibility of the existence of glaciation in the mountains of North-Eastern Siberia. In this regard, to determine the size and time of glaciation in the southern part of the Chersky Range, we carried out a complex of geomorphological and geochronological studies, which are part of the international project “Searching for the missing ice sheet in Eastern Siberia”. Because of fieldwork in the Ohandya Ridge, in the Malyk-Sien River valley, three terminal moraine ridges have been identified, reflecting different stages of glaciation. Based on the dating of exposed boulders within three terminal moraine complexes, 22 <sup>10</sup>Be cosmogenic dates were obtained. The average exposed age for the outer moraine is 120.8±13.7 ka, for the middle one North-Eastern 37.7±4.9 ka and for the internal moraine North-Eastern 13.8±2.2 ka. The age of the terminal moraine complexes testifies to the mountain-valley character of the glaciation of the Chersky Range in the Middle and Late Pleistocene, and emphasizes the trend towards a gradual decrease in the maximum length of glaciers in Northeast Asia. The successive reduction of glaciers from MIS 6 to MIS 2 indicates an increase in the deficit of atmospheric precipitation and a significant cryoaridization of the region. The decreasing trend may be related to the sharply continental conditions observed in the interior of Eurasia and western North America. This trend contrasts with much of the glaciated areas in the Northern Hemisphere, where the maximum area of Late Pleistocene glaciers is reconstructed for LGM time (MIS 2). The obtained datings of the glacial complexes of the Chersky Ridge confirm that at the end of the Middle and Late Pleistocene glaciations here were of a limited nature and there was no single ice cover in the mountains.</p></abstract><trans-abstract xml:lang="ru"><p>История изучения ледниковых комплексов Северо-Восточной Сибири насчитывает более 150 лет. За этот период получен обширный геологический и геоморфологический материал, давший возможность определить этапы, характер и размеры оледенений. В то же время дефицит прямых датировок ледникового рельефа, полученных геохронологическими методами, не позволяет проводить полноценные палеогеографические реконструкции. Это приводит к дискуссиям как в российской, так и в англоязычной литературе о возможности существования покровного оледенения в горах Северо-Восточной Сибири. В связи с этим для определения размеров и времени оледенения южной части хр. Черского нами был проведен комплекс геоморфологических и геохронологических исследований, в результате которых в долине р. Малык-Сиен (хр. Охандя) определен возраст трех конечно-моренных гряд, соответсвующих различным этапам оледенения. На основе датирования экспонированных валунов в пределах конечно-моренных комплексов получены 22 даты по космогенному <sup>10</sup>Be. Средний экспонированный возраст для внешней морены составляет 120.8±13.7 тыс. л., для средней – 37.7±4.9 тыс. л. и для внутренней морены – 13.8±2.2 тыс. л. Строение морен и возраст отложений свидетельствуют о горно-долинном характере оледенения хр. Черского в среднем и позднем плейстоцене. Последовательное уменьшение размера ледника в долине р. Малык-Сиен начиная с МИС 6 к МИС 2 указывает на увеличение дефицита атмосферных осадков и значительную криоаридизацию на юго-востоке хр. Черского. Эта тенденция контрастирует с большей частью районов, затронутых оледенением в Северном полушарии, где максимальная площадь ледников позднего плейстоцена реконструируется для времени последнего ледникового максимума (LGM, МИС 2).</p></trans-abstract><kwd-group xml:lang="en"><kwd>Okhandya Ridge</kwd><kwd>Malyk-Sien River valley</kwd><kwd>mountain-valley glaciers</kwd><kwd>terminal moraine</kwd><kwd>cosmogenic dating</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>хребет Охандя</kwd><kwd>долина р. Малык-Сиен</kwd><kwd>горно-долинные ледники</kwd><kwd>конечная морена</kwd><kwd>изотопное датирование</kwd></kwd-group><funding-group><award-group><funding-source><institution-wrap><institution xml:lang="ru">Независимый исследовательский фонд Дании – Естественные науки</institution></institution-wrap><institution-wrap><institution xml:lang="en">Independent Research Foundation of Denmark – Natural Sciences</institution></institution-wrap></funding-source><award-id>9040-00199B</award-id></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">Anan’ev G.S., Anan’eva E.G., Pakhomov A.Yu. (1984). Quaternary glaciations of the north-western Okhotsk region. In: Pleistotsenovye oledeneniya Vostoka Azii. Magadan. P. 43–56. (in Russ.)</mixed-citation><mixed-citation xml:lang="ru">Ананьев Г.С., Ананьева Э.Г., Пахомов А.Ю. (1984). Четвертичные оледенения северо-западного Приохотья. 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