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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">sergeogr</journal-id><journal-title-group><journal-title xml:lang="ru">Известия Российской академии наук. Серия географическая</journal-title><trans-title-group xml:lang="en"><trans-title>Izvestiya Rossiiskoi Akademii Nauk. Seriya Geograficheskaya</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2587-5566</issn><issn pub-type="epub">2658-6975</issn><publisher><publisher-name></publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.31857/S2587556623030081</article-id><article-id custom-type="edn" pub-id-type="custom">QSLXBQ</article-id><article-id custom-type="elpub" pub-id-type="custom">sergeogr-2294</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>Эволюция природных систем</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>Evolution of Natural System</subject></subj-group></article-categories><title-group><article-title>Новые данные о возрасте раннехвалынской трансгрессии Каспийского моря</article-title><trans-title-group xml:lang="en"><trans-title>New Data on the Age of the Early Khvalynian Transgression of the Caspian Sea</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Курбанов</surname><given-names>Р. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Kurbanov</surname><given-names>R. N.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Москва</p></bio><bio xml:lang="en"><p>Moscow</p></bio><email xlink:type="simple">kurbanov@igras.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Беляев</surname><given-names>В. Р.</given-names></name><name name-style="western" xml:lang="en"><surname>Belyaev</surname><given-names>V. R.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Москва</p></bio><bio xml:lang="en"><p>Moscow</p></bio><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Свистунов</surname><given-names>М. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Svistunov</surname><given-names>M. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Москва</p></bio><bio xml:lang="en"><p>Moscow</p></bio><xref ref-type="aff" rid="aff-3"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Бутузова</surname><given-names>Е. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Butuzova</surname><given-names>E. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Москва</p></bio><bio xml:lang="en"><p>Moscow</p></bio><xref ref-type="aff" rid="aff-3"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Солодовников</surname><given-names>Д. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Solodovnikov</surname><given-names>D. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Волгоград</p></bio><bio xml:lang="en"><p>Volgograd</p></bio><xref ref-type="aff" rid="aff-4"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Таратунина</surname><given-names>Н. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Taratunina</surname><given-names>N. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Москва</p></bio><bio xml:lang="en"><p>Moscow</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Янина</surname><given-names>Т. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Yanina</surname><given-names>T. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Москва</p></bio><bio xml:lang="en"><p>Moscow</p></bio><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Географический факультет, Московский государственный университет имени М.В. Ломоносова; Институт географии РАН</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Faculty of Geography, Moscow State University; Institute of Geography, Russian Academy of Sciences</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Географический факультет, Московский государственный университет имени М.В. Ломоносова</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Faculty of Geography, Moscow State University</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-3"><aff xml:lang="ru"><institution>Институт географии РАН</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Institute of Geography, Russian Academy of Sciences</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-4"><aff xml:lang="ru"><institution>Волгоградский государственный университет</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Volgograd State University</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2023</year></pub-date><pub-date pub-type="epub"><day>17</day><month>12</month><year>2023</year></pub-date><volume>87</volume><issue>3</issue><elocation-id>403–419</elocation-id><permissions><copyright-statement>Copyright &amp;#x00A9; Курбанов Р.Н., Беляев В.Р., Свистунов М.И., Бутузова Е.А., Солодовников Д.А., Таратунина Н.А., Янина Т.А., 2023</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="ru">Курбанов Р.Н., Беляев В.Р., Свистунов М.И., Бутузова Е.А., Солодовников Д.А., Таратунина Н.А., Янина Т.А.</copyright-holder><copyright-holder xml:lang="en">Kurbanov R.N., Belyaev V.R., Svistunov M.I., Butuzova E.A., Solodovnikov D.A., Taratunina N.A., Yanina T.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://izvestia.igras.ru/jour/article/view/2294">https://izvestia.igras.ru/jour/article/view/2294</self-uri><abstract><p>В статье представлены результаты первой детальной абсолютной хронологии раннехвалынской трансгрессии Каспийского моря на основе датирования методом оптически-стимулированной люминесценции (ОСЛ) и их обсуждение. Исследование проведено для особой фации хвалынских отложений – шоколадных глин, широко распространенных в Прикаспийской низменности. В изученных опорных разрезах Нижнего Поволжья (Средняя Ахтуба, Райгород, Ленинск) шоколадные глины имеют значительную мощность, в их строении выделяется три подфации: пачка переслаивания песков и суглинков, пачка монолитных плотных глин и венчающая разрез характерная пачка с тонкими пропластами алеврита, образующими характерную мелкоплитчатую структуру. Первая пачка отражает условия начального этапа проникновения хвалынских вод в район расположения разреза, вторая – условия глубоководного залива, третья – время регрессии со значительным участием аллювиальных процессов в осадконакоплении. ОСЛ-хронология получена по результатам параллельного датирования по кварцевым и полевошпатовым зернам с применением современных протоколов измерений люминесценции минералов. Результаты датирования свидетельствуют о формировании нижнехвалынских морских отложений в северной части Нижнего Поволжья в период между 27 и 14 тыс. л. н. Данные о возрасте хвалынских отложений дополнительно подтверждены датами по вышележащим каштановым почвам (9.6–0.7 тыс. л. н.) и подстилающим лёссово-почвенным сериям (37–19 тыс. л. н.). Люминесцентное датирование высокого разрешения позволило впервые выделить четыре стадии развития хвалынской трансгрессии в Нижнем Поволжье: первоначального проникновения вод до уровня ~5 м абс. (27 тыс. л. н.); стадию стабилизации и постепенного подъема уровня с ~5 до 7 м абс. (27–20 тыс. л. н.); этап активного повышения уровня моря до максимальных значений и перемещения береговой линии на север (17–15 тыс. л. н.); финальную регрессивную фазу с падением уровня моря (15–14 тыс. л. н.).</p></abstract><trans-abstract xml:lang="en"><p>This study presents results of the first detailed absolute chronology of the Early Khvalynian transgression of the Caspian Sea based on optically stimulated luminescence (OSL) dating. Study was carried out for special facies of the Khvalyninan deposits–Chocolate Clays, widely distributed in the Northern Caspian Lowland. In the studied reference sections of the Lower Volga region (Srednyaya Akhtuba, Raygorod, Leninsk), Chocolate Clays are of considerable thickness, three subfacies are distinguished in their structure: a unit of interbedded sands and loams; unit of unified dense clays; and a unit of characteristic clays with thin interlayers of silt, forming a characteristic fine-platy structure. The first unit reflects the conditions of the initial penetration of the Khvalynian waters into the studied area, the second unit reflects conditions of a deep-sea bay, while the third unit reflects the time of regression, with a significant influence of alluvial processes on sedimentation. OSL chronology was obtained for both quartz and feldspar grains using modern measuring protocols. Our dating results clearly indicate that formation of the Lower Khvalynian marine deposits in the northern part of the Lower Volga region took place between 27 and 14 ka. New data on the age of the Khvalynian deposits are further confirmed by dating of the overlying Kastanozem soils (9.6–0.7 ka) and the underlying loess-paleosol series (37–19 ka). High-resolution luminescence dating for the first time distinguished four stages in the development of the Khvalynian transgression in the Lower Volga region: the initial penetration of waters to a level of ~5 m (27 ka); stage of stabilization and gradual level rise from ~5 to ~7 m (27–20 ka); the stage of active sea level rise and movement of the coastline northward (16–15 ka); and the final regressive phase with a drop in sea level (15–14 ka).</p></trans-abstract><kwd-group xml:lang="ru"><kwd>Каспийское море</kwd><kwd>хвалынская трансгрессия</kwd><kwd>колебания уровня моря</kwd><kwd>ОСЛ-датирование</kwd><kwd>геохронология</kwd><kwd>поздний плейстоцен</kwd><kwd>палеогеография</kwd><kwd>шоколадные глины</kwd></kwd-group><kwd-group xml:lang="en"><kwd>Khvalynian transgression</kwd><kwd>Caspian Sea</kwd><kwd>sea-level change</kwd><kwd>OSL dating</kwd><kwd>quartz</kwd><kwd>feldspar</kwd><kwd>chronology</kwd><kwd>Chocolate Clays</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Исследование выполнено при поддержке Российского научного фонда: проекты № 16-17-10103 (полевые работы в 2016 и 2017 гг.), № 17-77-10134 (полевые работы в 2018 г. и аналитические исследования) и № 19-77-10077 (абсолютное датирование). Авторы признательны анонимным рецензентам за ценные замечания, A.S. Murray, J.-P. Buylaert, W. Tompson за помощь в получении датировок, А.В. Панину, М.П. Лебедевой и Е.Н. Бадюковой за обсуждение результатов датирования и рекомендации.</funding-statement><funding-statement xml:lang="en">This study was supported by the Russian Science Foundation, projects nos. 16-17-10103 (field work in 2016 and 2017), 17-77-10134 (field work in 2018 and analytical studies) and 19-77-10077 (absolute dating). We are grateful to A.S. Murray, J.-P. Buylaert, W. Tompson for help during luminescence dating, A.V. Panin, M.P. Lebedeva, and E.N. Badyukova for discussion of dating results and valuable recommendations.</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">Андрусов Н.И. О геологических исследованиях в Закаспийской области, произведенных в 1887 г. // Тр. 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