gtcrustГеодинамика и тектонофизикаGeodynamics & Tectonophysics2078-502XInstitute of the Earth's crust of the Russian Academy of Sciences, Siberian Branch10.5800/GT-2025-16-6-0858KNGEMOgtcrust-2149Research ArticleПАЛЕОГЕОДИНАМИКАPALEOGEODYNAMICSВУЛКАНИЗМ ЖАРМА-САУРСКОЙ ЗОНЫ, ВОСТОЧНЫЙ КАЗАХСТАН: ВОЗРАСТ, ВЕЩЕСТВЕННЫЙ СОСТАВ И ОБСТАНОВКИ ФОРМИРОВАНИЯVOLCANISM OF THE ZHARMA-SAUR ZONE, EASTERN KAZAKHSTAN: GEOCHRONOLOGY, GEOCHEMISTRY AND TECTONIC IMPLICATIONShttps://orcid.org/0009-0004-2654-4767ПенкинаВ. А.PenkinaV. A.

630090, Новосибирск, пр-т Академика Коптюга, 3 

3 Academician Koptyug Ave, Novosibirsk 630090

penkinava@igm.nsc.ruhttps://orcid.org/0000-0002-9654-6889КотлерП. Д.KotlerP. D.

630090, Новосибирск, пр-т Академика Коптюга, 3 

420008, Казань, ул. Кремлевская, 18

3 Academician Koptyug Ave, Novosibirsk 630090

18 Kremlyovskaya St, Kazan 420008

https://orcid.org/0000-0001-5951-0660ХромыхС. В.KhromykhS. V.

630090, Новосибирск, пр-т Академика Коптюга, 3 

3 Academician Koptyug Ave, Novosibirsk 630090

https://orcid.org/0000-0001-6656-6718СюЯ.XuY.

610059, Чэнду, Восточная Третья Дорога, 1

университет, 100871, Пекин, ул. Ихэюань, 5

1 East Third Rd, Chengdu 610059

5 Yiheyuan St, Beijing 100871

https://orcid.org/0000-0003-4263-5031КуликоваА. В.KulikovaA. V.

630090, Новосибирск, пр-т Академика Коптюга, 3 

420008, Казань, ул. Кремлевская, 18

3 Academician Koptyug Ave, Novosibirsk 630090

18 Kremlyovskaya St, Kazan 420008

Институт геологии и минералогии им. В.С. Соболева СО РАНРоссияSobolev Institute of Geology and Mineralogy, Siberian Branch of the Russian Academy of SciencesRussian FederationИнститут геологии и минералогии им. В.С. Соболева СО РАН ; Казанский (Приволжский) федеральный университетРоссияSobolev Institute of Geology and Mineralogy, Siberian Branch of the Russian Academy of Sciences ; Kazan Federal UniversityRussian FederationЧэндуский технологический университет ; Пекинский университетКитайChengdu University of Technology ; Peking UniversityChina202511122025166858858Copyright © Пенкина В.А., Котлер П.Д., Хромых С.В., Сю Я., Куликова А.В., 20252025Пенкина В.А., Котлер П.Д., Хромых С.В., Сю Я., Куликова А.В.Penkina V.A., Kotler P.D., Khromykh S.V., Xu Y., Kulikova A.V.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://www.gt-crust.ru/jour/article/view/2149

В статье представлены результаты комплексного изучения вулканогенных толщ Жарма-Саурской зоны, расположенной в западной части герцинской Обь-Зайсанской складчатой области на границе с раннепалеозойской Бощекуль-Чингизской складчатой областью, которая входит в состав Казахстанского составного блока. U-Pb геохронологические исследования показали, что в пределах зоны выделяются две группы вулканических пород с раннекаменноугольным (~345 млн лет) и позднекаменноугольным (~303 млн лет) возрастом. Раннекаменноугольные вулканические породы представлены в основном низкокалиевыми толеитовыми и известково-щелочными базальтами и андезибазальтами, слагающими основной объем восточной части Жарма-Саурской зоны. Позднекаменноугольные породы представлены бимодальной серией пород от трахиандезибазальтов через риодациты, риолиты до трахириолитов, которые формируют изолированную брахисинклиналь в восточной части зоны. Формирование ранних вулканических пород отвечает субдукционному этапу развития зоны, а более поздние эффузивы отвечают обстановке постколлизионного растяжения.

This study presents the results of investigations into volcanic strata of the Zharma-Saur zone, located in the western part of the Hercynian Ob’-Zaisan folded area at its boundary with the Early Paleozoic Boshchekul-Chingiz folded area, which forms part of the Kazakhstan composite block (paleocontinent). U-Pb geochronological studies revealed two distinct groups of volcanic rocks within the zone: Early Carboniferous (~345 Ma) and Late Carboniferous (~303 Ma). Low-K tholeiitic and calc-alkaline basalts, basaltic andesites, and andesites represent the Early Carboniferous volcanic rocks, which are the main constituents of the eastern Zharma-Saur zone. The Late Carboniferous rocks comprise a trachybasalt to trachyrhyolite bimodal series, which forms an isolated brachysyncline in the eastern part of the zone. The formation of the early volcanic rocks corresponds to the subductional phase of the zone evolution, while the later volcanics may be associated with post-collisional extension processes.

Обь-Зайсанская складчатая системазона субдукциипостколлизионный магматизмпетрогеохимияU-Pb геохронологияOb’-Zaisan folded areasubduction zonepost-collisional magmatismpetro-geochemistryU-Pb geochronologyПолевые, геохимические и геохронологические исследования выполнены при поддержке РНФ (грант № 24-77-10050). Петрографические исследования проведены в рамках госзадания ИГМ СО РАН (проект № 122041400044-2).Field, geochemical, and geochronological studies were supported by the RSF (grant No. 24-77-10050). Petrographic research was carried out on the state assignment of the IGM SB RAS (project No. 122041400044-2).ReferencesБерзин Н.А., Колман Р.Г., Добрецов Н.Л., Зоненшайн Л.П., Сяо Сючань, Чанг Э.З. Геодинамическая эволюция западной части Палеоазиатского океана // Геология и геофизика. 1994. Т. 35. № 7–8. С. 8–28.Berzin N.A., Kolman R.G., Dobretsov N.L., Zonenshain L.P., Syao Syuchan, Chang E.Z., 1994. Geodynamic Evolution of the Western Part of the Paleo-Asian Ocean. 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