<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE article PUBLIC "-//NLM//DTD JATS (Z39.96) Journal Publishing DTD v1.3 20210610//EN" "JATS-journalpublishing1-3.dtd">
<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">reggeomet</journal-id><journal-title-group><journal-title xml:lang="ru">Региональная геология и металлогения</journal-title><trans-title-group xml:lang="en"><trans-title>Regional Geology and Metallogeny</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">0869-7892</issn><publisher><publisher-name>(ФГБУ "Институт Карпинского")</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.52349/0869-7892_2025_103_22-38</article-id><article-id custom-type="elpub" pub-id-type="custom">reggeomet-329</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>РЕГИОНАЛЬНАЯ ГЕОЛОГИЯ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>REGIONAL GEOLOGY</subject></subj-group></article-categories><title-group><article-title>Новые данные о возрасте древних конгломератов бассейнов рек Эбелях, Биллях и Маят и их влияние на промышленную алмазоносность, Республика Саха (Якутия)</article-title><trans-title-group xml:lang="en"><trans-title>New data on the age of ancient conglomerates in the Ebelyakh, Billyakh, and Mayat River basins and their implications for commercial diamond potential, Republic of Sakha (Yakutia)</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0009-5327-309X</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Граханов</surname><given-names>С. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Grakhanov</surname><given-names>S. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Граханов Сергей Александрович; доктор геолого-минералогических наук, ведущий научный сотрудник; директор минерально-сырьевой базы</p><p>Санкт-Петербург</p><p>Якутск</p></bio><bio xml:lang="en"><p>Sergey A. Grakhanov; DSc (Geology and Mineralogy),Chief Researcher; Director of the Mineral Resources Base</p><p>Saint Petersburg</p><p>Yakutsk</p></bio><email xlink:type="simple">s.grakhanov@yandex.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/0009-0007-3390-1955</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Голобурдина</surname><given-names>М. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Goloburdina</surname><given-names>M. N.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Голобурдина Марина Николаевна, ведущий геолог</p><p>Санкт-Петербург</p></bio><bio xml:lang="en"><p>Marina N. Goloburdina, Leading Geologist</p><p>Saint Petersburg</p></bio><email xlink:type="simple">Marina_Goloburdina@karpinskyinstitute.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/0009-0004-2188-4017</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Зубова</surname><given-names>Т. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Zubova</surname><given-names>T. N.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Зубова Татьяна Николаевна, заместитель генерального директора по геологоразведочным работам</p><p>Санкт-Петербург</p></bio><bio xml:lang="en"><p>Tatiana N. Zubova, Deputy Director General in geological exploration</p><p>Saint Petersburg</p></bio><email xlink:type="simple">Tatiana_Zubova@karpinskyinstitute.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/0000-0002-6424-0068</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Проскурнин</surname><given-names>В. Ф.</given-names></name><name name-style="western" xml:lang="en"><surname>Proskurnin</surname><given-names>V. F.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Проскурнин Василии Федорович, доктор геолого-минералогических наук, заведующий отделом региональной геологии и полезных ископаемых Севера Сибири</p><p>Санкт-Петербург</p><p>РИНЦ Author ID 125966</p></bio><bio xml:lang="en"><p>Vasiliy F. Proskurnin, DSc (Geology and Mineralogy), Head, Department of Regional Geology and Mineral Resources of the North of Siberia</p><p>Санкт-Петербург</p><p>RSCI Author ID 125966</p></bio><email xlink:type="simple">Vasily_Proskurnin@karpinskyinstitute.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/0009-0002-1826-0655</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Тарасов</surname><given-names>А. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Tarasov</surname><given-names>A. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Тарасов Алексеи Всеволодович, кандидат геолого-минералогических наук, заместитель начальника Управления геологических основ, науки и информатики</p><p>Москва</p></bio><bio xml:lang="en"><p>Aleksey V. Tarasov, PhD (Geology and Mineralogy), Deputy Head, Management of Geological Bases, Science, and Information Technology</p><p>Moscow</p></bio><email xlink:type="simple">atarasov@rosnedra.gov.ru</email><xref ref-type="aff" rid="aff-3"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru">Всероссийский научно-исследовательский геологический институт им. А. П. Карпинского; ПАО «АЛМАР — алмазы Арктики»<country>Россия</country></aff><aff xml:lang="en">All-Russian Geological Research Institute of A. P. Karpinsky; ALMAR — diamonds of the Arctic<country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru">Всероссийский научно-исследовательский геологический институт им. А. П. Карпинского<country>Россия</country></aff><aff xml:lang="en">All-Russian Geological Research Institute of A. P. Karpinsky<country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-3"><aff xml:lang="ru">Федеральное агентство по недропользованию<country>Россия</country></aff><aff xml:lang="en">Federal Subsoil Resources Management Agency<country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2025</year></pub-date><pub-date pub-type="epub"><day>11</day><month>09</month><year>2025</year></pub-date><volume>32</volume><issue>3 (103)</issue><fpage>22</fpage><lpage>38</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Граханов С.А., Голобурдина М.Н., Зубова Т.Н., Проскурнин В.Ф., Тарасов А.В., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Граханов С.А., Голобурдина М.Н., Зубова Т.Н., Проскурнин В.Ф., Тарасов А.В.</copyright-holder><copyright-holder xml:lang="en">Grakhanov S.A., Goloburdina M.N., Zubova T.N., Proskurnin V.F., Tarasov A.V.</copyright-holder><license 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://reggeomet.elpub.ru/jour/article/view/329">https://reggeomet.elpub.ru/jour/article/view/329</self-uri><abstract><p>В пределах уникальных россыпных месторождений Эбелях, Биллях и Маят, расположенных в Анабарском алмазоносном районе, в делювиальных отложениях широко развиты глыбы конгломератов, содержащих алмазы и высокие концентрации индикаторных минералов кимберлитов. Конгломераты в коренном залегании не установлены. По единичным находкам фауны была выдвинута гипотеза о каменноугольном возрасте данных образований, что предполагает палеозойский возраст коренного источника эбеляхских россыпей. Однако поиски коренных месторождений, проводимые в соответствии с этой парадигмой, не дают положительных результатов. В работе представлены аналитические материалы U-Pb датирования (SIMS SHRIMP-II) детритовых цирконов из данных конгломератов, доказывающие широкий их возрастной диапазон с наиболее молодыми меловыми значениями, соответствующими возрасту формирования раннемеловых эрозионно-карстовых депрессий, широко развитых в исследуемом регионе. Полученные материалы указывают на необходимость существенной корректировки методики поисков коренных месторождений алмазов в Анабарском районе с учетом мезозойского возраста искомых кимберлитов, что существенно снизит стоимость работ.</p></abstract><trans-abstract xml:lang="en"><p>In the Anabar diamondiferous region, within the unique placer deposits of the Ebelyakh, Billyakh, and Mayat rivers, blocks of conglomerates containing diamonds and high concentrations of kimberlite indicator minerals are widespread in the deluvial sediments. These conglomerates have not been identified in situ. Single fossil findings proposed the Carboniferous age for these formations, which implies the Paleozoic age for the primary source of the Ebelyakh placers. This paradigm encourages exploration for the primary sources of the unique placers but without success. The paper presents U-Pb (SIMS SHRIMP-II) detrital zircon dating data from these conglomerates; they demonstrate a wide age range, with the youngest values corresponding to the Early Cretaceous, which correspond to the timing of erosional-karst depressions developed extensively in the study area. These findings require a substantial revision of strategies for primary diamond deposits exploration in the Anabar region, accounting for the Mesozoic age of the target kimberlites, which could significantly reduce exploration costs.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>циркон</kwd><kwd>U-Pb возраст</kwd><kwd>SIMS SHRIMP-II</kwd><kwd>алмаз</kwd><kwd>минералы-индикаторы кимберлитов</kwd><kwd>мел</kwd><kwd>северо-восток Сибирской платформы</kwd></kwd-group><kwd-group xml:lang="en"><kwd>zircon</kwd><kwd>U-Pb age</kwd><kwd>SIMS SHRIMP-II</kwd><kwd>diamond</kwd><kwd>kimberlite indicator minerals</kwd><kwd>Cretaceous</kwd><kwd>North-East Siberian Platform</kwd></kwd-group><funding-group xml:lang="ru"><funding-statement>работы выполнены в рамках Государственного задания Федерального агентства по недропользованию № 049-00018-22-0 от 14.01.2022.</funding-statement></funding-group><funding-group xml:lang="en"><funding-statement>The Federal Subsoil Resources Management Agency supported the research (state geological study, no. 049-00018-22-0 dated 14.01.2022).</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">Россыпи алмазов России / С. А. Граханов [и др.] ; гл. ред. Д. А. Додин. Новосибирск : Акад. изд-во «Гео», 2007. 457 с.</mixed-citation><mixed-citation xml:lang="en">Diamond placers of Russia / S. A. Grakhanov [et al.]; Chief Ed. D. A. Dodin. Novosibirsk: Acad. Publ. House “Geo”; 2007. 457 p. (In Russ.).</mixed-citation></citation-alternatives></ref><ref id="cit2"><label>2</label><citation-alternatives><mixed-citation xml:lang="ru">Дэвис Г. Л., Соболев Н. В., Харькив А. Д. Новые данные о возрасте кимберлитов Якутии, полученные уран-свинцовым методом по цирконам // Доклады Академии наук СССР. 1980. Т. 254, № 1. С. 175–179.</mixed-citation><mixed-citation xml:lang="en">Davis G. L., Sobolev N. V., Kharkiv A. D. New U-Pb zircon dating results of kimberlites from Yakutia. Reports of the USSR Academy of Sciences. 1980; 254 (1): 175–179. (In Russ.).</mixed-citation></citation-alternatives></ref><ref id="cit3"><label>3</label><citation-alternatives><mixed-citation xml:lang="ru">Прокопчук Б. И., Сочнева Э. Г., Скосырев В. А. Первая находка реликтов отложений карбонового возраста в бассейне р. Анабар (Западная Якутия) // Доклады Академии наук СССР. 1970. Т. 193, № 5. С. 1137–1139.</mixed-citation><mixed-citation xml:lang="en">Prokopchuk B. I., Sochneva E. G., Skosyrev V. A. First discovery of Carboniferous relict deposits in the Anabar River Basin (Western Yakutia). Reports of the USSR Academy of Sciences. 1970; 193 (5): 1137–1139. (In Russ.).</mixed-citation></citation-alternatives></ref><ref id="cit4"><label>4</label><citation-alternatives><mixed-citation xml:lang="ru">Граханов С. А., Смелов А. П. Возраст прогнозируемых коренных источников алмазов на севере Якутии // Отечественная геология. 2011. № 5. С. 56–64.</mixed-citation><mixed-citation xml:lang="en">Grakhanov S. A., Smelov A. P. Age of predicted primary sources of diamonds in Northern Yakutia. Otechestvennaya Geologiya. 2011; (5): 56–64. (In Russ.).</mixed-citation></citation-alternatives></ref><ref id="cit5"><label>5</label><citation-alternatives><mixed-citation xml:lang="ru">Williams I. S. U-Th-Pb geochronology by ion microprobe // Applications of microanalytical techniques to understanding mineralizing processes / Eds. M. A. McKibben, W. C. Shanks III, W. I. Ridley. Vol. 7. Littleton, USA : Society of Economic Geologists, 1998. P. 1–35. https://doi.org/10.5382/Rev.07.01.</mixed-citation><mixed-citation xml:lang="en">Williams I. S. U-Th-Pb geochronology by ion microprobe. Applications of microanalytical techniques to understanding mineralizing processes / Eds. M. A. McKibben, W. C. Shanks III, W. I. Ridley. Vol. 7. Littleton, USA: Society of Economic Geologists; 1998. P. 1–35. https://doi.org/10.5382/Rev.07.01.</mixed-citation></citation-alternatives></ref><ref id="cit6"><label>6</label><citation-alternatives><mixed-citation xml:lang="ru">Improved 206Pb/238U microprobe geochronology by the monitoring of a trace-element related matrix effect; SHRIMP, ID-TIMS, ELA-ICP-MS and oxygen isotope documentation for a series of zircon standards / L. P. Black [et al.] // Chemical Geology. 2004. Vol. 205, nos. 1–2. P. 115–140. https://doi.org/10.1016/j.chemgeo.2004.01.003.</mixed-citation><mixed-citation xml:lang="en">Improved 206Pb/238U microprobe geochronology by the monitoring of a trace-element related matrix effect; SHRIMP, ID-TIMS, ELA-ICP-MS and oxygen isotope documentation for a series of zircon standards / L. P. Black [et al.]. Chemical Geology. 2004; 205 (1–2): 115–140. https://doi.org/10.1016/ j.chemgeo.2004.01.003.</mixed-citation></citation-alternatives></ref><ref id="cit7"><label>7</label><citation-alternatives><mixed-citation xml:lang="ru">Three natural zircon standards for U-Th-Pb, Lu-Hf, trace element and REE analysis / M. Wiedenbeck [et al.] // Geostandards and Geoanalytical Research. 1995. Vol. 19, no. 1. P. 1–23. https://doi.org/10.1111/j.1751-908X.1995.tb00147.x.</mixed-citation><mixed-citation xml:lang="en">Three natural zircon standards for U-Th-Pb, Lu-Hf, trace element and REE analysis / M. Wiedenbeck [et al.]. Geostandards and Geoanalytical Research. 1995; 19 (1): 1–23. https:// doi.org/10.1111/j.1751-908X.1995.tb00147.x.</mixed-citation></citation-alternatives></ref><ref id="cit8"><label>8</label><citation-alternatives><mixed-citation xml:lang="ru">Igneous zircon: Trace element composition as an indicator of source rock type / E. Belousova [et al.] // Contrib Mineral Petrol. 2002. Vol. 143. P. 602–622. https://doi.org/10.1007/s00410-002-0364-7.</mixed-citation><mixed-citation xml:lang="en">Igneous zircon: Trace element composition as an indicator of source rock type / E. Belousova [et al.]. Contrib Mineral Petrol. 2002; 143: 602–622. https://doi:10.1007/s00410-002-0364-7.</mixed-citation></citation-alternatives></ref><ref id="cit9"><label>9</label><citation-alternatives><mixed-citation xml:lang="ru">SHRIMP U-Pb zircon ages of Yakutian kimberlite pipes / E. N. Lepekhina [et al.] // Intern. Kimberlite Conf.: Extended abstr. 2008. Vol. 9. P. 1–3. https://doi.org/10.29173/ikc3572.</mixed-citation><mixed-citation xml:lang="en">SHRIMP U-Pb zircon ages of Yakutian kimberlite pipes / E. N. Lepekhina [et al.]. Intern. Kimberlite Conf.: Extended abstr. 2008; 9: 1–3. https://doi.org/10.29173/ikc3572.</mixed-citation></citation-alternatives></ref><ref id="cit10"><label>10</label><citation-alternatives><mixed-citation xml:lang="ru">Комаров А. Н., Илупин И. П. Геохронология кимберлитов Сибирской платформы по данным метода треков // Геохимия. 1990. № 3. С. 365–372.</mixed-citation><mixed-citation xml:lang="en">Komarov A. N., Ilupin I. P. Geochronology of Siberian Platform kimberlites based on fission-track method. Geochemistry. 1990; (3): 365–372. (In Russ.).</mixed-citation></citation-alternatives></ref><ref id="cit11"><label>11</label><citation-alternatives><mixed-citation xml:lang="ru">Barton E. S., Brakhfogel F. F., Williams I. S. U-Pb zircon age for carbonatite and alkali-pikrite pipes, Orto-Yiarga Field (Yakutia), Russia // Intern. Kimberlite Conf.: Extended abstr. 1995. Vol. 6, no. 1. P. 37. https://doi.org/10.29173/ikc1771.</mixed-citation><mixed-citation xml:lang="en">Barton E. S., Brakhfogel F. F., Williams I. S. U-Pb zircon age for carbonatite and alkali-pikrite pipes, Orto-Yiarga Field (Yakutia), Russia. Intern. Kimberlite Conf.: Extended abstr. 1995; 6 (1): 37. https://doi.org/10.29173/ikc1771.</mixed-citation></citation-alternatives></ref><ref id="cit12"><label>12</label><citation-alternatives><mixed-citation xml:lang="ru">Древний карст и его россыпная минерагения / Б. И. Прокопчук [и др.] ; отв. ред. Н. А. Шило. М. : Наука, 1985. 175 с.</mixed-citation><mixed-citation xml:lang="en">Ancient karst and its placer mineralization / B. I. Pro-kopchuk [et al.]; Publ. Ed. N. A. Shilo. Moscow: Nauka; 1985. 175 p. (In Russ.).</mixed-citation></citation-alternatives></ref><ref id="cit13"><label>13</label><citation-alternatives><mixed-citation xml:lang="ru">Соболев Н. В. О минералогических критериях ал-мазоносности кимберлитов // Геология и геофизика. 1971. Т. 12, № 3. С. 70–80.</mixed-citation><mixed-citation xml:lang="en">Sobolev N. V. On mineralogical criterions of diamond content in kimberlites. Russ. Geol. Geophys. 1971; 12 (3): 70–80 (In Russ.).</mixed-citation></citation-alternatives></ref><ref id="cit14"><label>14</label><citation-alternatives><mixed-citation xml:lang="ru">Соболев Н. В. Глубинные включения в кимберлитах и проблема состава верхней мантии / отв. ред. В. С. Соболев. Новосибирск : Наука, 1974. 264 с.</mixed-citation><mixed-citation xml:lang="en">Sobolev N. V. The deep seated inclusions in kimberlites and the problem of the upper mantle composition / Publ. Ed. V. S. Sobolev. Novosibirsk: Publ. House “Nauka”; 1974. 264 p. (In Russ.).</mixed-citation></citation-alternatives></ref><ref id="cit15"><label>15</label><citation-alternatives><mixed-citation xml:lang="ru">Gurney J. J., Zweistra P. The interpretation of the major element compositions of mantle minerals in diamond exploration // Journal of Geochemical Exploration. 1995. Vol. 53, nos. 1–3. Р. 293–309. https://doi.org/10.1016/0375-6742(94)00021-3.</mixed-citation><mixed-citation xml:lang="en">Gurney J. J., Zweistra P. The interpretation of the major element compositions of mantle minerals in diamond exploration. Journal of Geochemical Exploration. 1995; 53 (1–3): 293–309. https://doi.org/10.1016/0375-6742(94)00021-3.</mixed-citation></citation-alternatives></ref><ref id="cit16"><label>16</label><citation-alternatives><mixed-citation xml:lang="ru">Микрокристаллические оксиды из кимберлитов России / В. К. Гаранин [и др.]. М. : ООО «Изд-во ГЕОС», 2009. 498 с.</mixed-citation><mixed-citation xml:lang="en">Microcrystalline oxides from Russian kimberlites end related rocks / V. K. Garanin [et al.]. Moscow: Publ. House “GEOS”; 2009. 498 p. (In Russ.).</mixed-citation></citation-alternatives></ref><ref id="cit17"><label>17</label><citation-alternatives><mixed-citation xml:lang="ru">Compositional classification of “kimberlitic” and “non-kiberlitic” ilmenite / B. A. Wyatt [et al.] // Lithos. 2004. Vol. 77. P. 819–840. https://doi.org/10.1016/j.lithos.2004.04.025.</mixed-citation><mixed-citation xml:lang="en">Compositional classification of “kimberlitic” and “non-kimberlitic” ilmenite / B. A. Wyatt [et al.]. Lithos. 2004; 77: 819–840. https://doi.org/10.1016/j.lithos.2004.04.025.</mixed-citation></citation-alternatives></ref><ref id="cit18"><label>18</label><citation-alternatives><mixed-citation xml:lang="ru">Коптиль В. И., Биленко Ю. М. Типоморфизм алмазов из россыпей северо-восточной части Сибирской платформы по данным их комплексного исследования // Методы комплексного изучения алмазосодержащего сырья : тр. ЦНИГРИ. Вып. 175. М., 1983. С. 37–46.</mixed-citation><mixed-citation xml:lang="en">Koptil V. I., Bilenko Yu. M. Typomorphism of diamonds from placers in the North-East Siberian Platform based on complex studies. Complex study methods of diamond-bearing materials: TsNIGRI Trans. No. 175. Moscow; 1983. P. 37–46 (In Russ.).</mixed-citation></citation-alternatives></ref><ref id="cit19"><label>19</label><citation-alternatives><mixed-citation xml:lang="ru">Зинчук Н. Н., Коптиль В. И. Типоморфизм алмазов Сибирской платформы. М. : Недра, 2003. 603 с.</mixed-citation><mixed-citation xml:lang="en">Zintchouk N. N., Koptil V. I. Typomorphism of the Siberian platform diamonds. Moscow: Nedra; 2003. 603 p. (In Russ.).</mixed-citation></citation-alternatives></ref><ref id="cit20"><label>20</label><citation-alternatives><mixed-citation xml:lang="ru">Орлов Ю. Л. Минералогия алмаза / отв. ред. Г. П. Бар-санов. 2-е изд. М. : Изд-во «Наука», 1984. 170 с.</mixed-citation><mixed-citation xml:lang="en">Orlov Yu. L. Mineralogy of diamond / Publ. Ed. G. P. Barsanov. 2nd ed. Moscow: Nauka Publ. House; 1984. 170 p. (In Russ.).</mixed-citation></citation-alternatives></ref><ref id="cit21"><label>21</label><citation-alternatives><mixed-citation xml:lang="ru"></mixed-citation><mixed-citation xml:lang="en"></mixed-citation></citation-alternatives></ref></ref-list><fn-group><fn fn-type="conflict"><p>The authors declare that there are no conflicts of interest present.</p></fn></fn-group></back></article>
