gtcrustГеодинамика и тектонофизикаGeodynamics & Tectonophysics2078-502XInstitute of the Earth's crust of the Russian Academy of Sciences, Siberian Branch10.5800/GT-2024-15-1-0741RDVHJJgtcrust-1793Research ArticleПАЛЕОГЕОДИНАМИКАPALEOGEODYNAMICSГЕОХРОНОЛОГИЯ ПОРОД ЩЕЛОЧНОГО МАССИВА БУРПАЛА (СЕВЕРНОЕ ПРИБАЙКАЛЬЕ): НОВЫЕ U-Pb ДАННЫЕGEOCHRONOLOGY OF ALKALINE ROCKS FROM THE BURPALA MASSIF (NORTHERN PRIBAIKALYE): NEW U-Pb DATAhttps://orcid.org/0000-0001-9445-9960ИзбродинИ. А.IzbrodinI. А.

630090, Новосибирск, пр-т Академика Коптюга, 3; 630090, Новосибирск, ул. Пирогова, 1

3 Academician Koptyug Ave, Novosibirsk 630090; 1 Pirogov St, Novosibirsk 630090

https://orcid.org/0000-0001-5191-277XДорошкевичА. Г.DoroshkevichА. G.

630090, Новосибирск, пр-т Академика Коптюга, 3; 670047, Улан-Удэ, ул. Сахьяновой, 6а, Республика Бурятия

3 Academician Koptyug Ave, Novosibirsk 630090; 6а Sakhyanova St, Ulan-Ude 670047, Republic of Buryatia

МалютинаА. В.MalyutinaА. V.

630090, Новосибирск, пр-т Академика Коптюга, 3; 630090, Новосибирск, ул. Пирогова, 1

3 Academician Koptyug Ave, Novosibirsk 630090; 1 Pirogov St, Novosibirsk 630090

https://orcid.org/0000-0002-8798-377XСеменоваД. В.SemenovaD. V.

630090, Новосибирск, пр-т Академика Коптюга, 3

3 Academician Koptyug Ave, Novosibirsk 630090

https://orcid.org/0000-0002-6220-9980РадомскаяТ. А.RadomskayaТ. А.

630090, Новосибирск, ул. Пирогова, 1; 664033, Иркутск, ул. Фаворского, 1а

1 Pirogov St, Novosibirsk 630090; 1а Favorsky St, Irkutsk 664033

КрукМ. Н.KrukМ. N.

630090, Новосибирск, пр-т Академика Коптюга, 3; 630090, Новосибирск, ул. Пирогова, 1

3 Academician Koptyug Ave, Novosibirsk 630090; 1 Pirogov St, Novosibirsk 630090

https://orcid.org/0000-0003-3162-7538ПрокопьевИ. Р.ProkopyevI. R.

630090, Новосибирск, пр-т Академика Коптюга, 3; 630090, Новосибирск, ул. Пирогова, 1

3 Academician Koptyug Ave, Novosibirsk 630090; 1 Pirogov St, Novosibirsk 630090

https://orcid.org/0000-0003-2203-153XСтариковаА. Е.StarikovaА. Е.

630090, Новосибирск, пр-т Академика Коптюга, 3; 630090, Новосибирск, ул. Пирогова, 1

3 Academician Koptyug Ave, Novosibirsk 630090; 1 Pirogov St, Novosibirsk 630090

https://orcid.org/0000-0001-8059-1047РампиловМ. О.RampilovМ. О.

670047, Улан-Удэ, ул. Сахьяновой, 6а, Республика Бурятия; 630090, Новосибирск, ул. Пирогова, 1

6а Sakhyanova St, Ulan-Ude 670047, Republic of Buryatia; 1 Pirogov St, Novosibirsk 630090

Институт геологии и минералогии им. В.С. Соболева СО РАН; Новосибирский государственный университетРоссияSobolev Institute of Geology and Mineralogy, Siberian Branch of the Russian Academy of Sciences; Novosibirsk State UniversityRussian FederationИнститут геологии и минералогии им. В.С. Соболева СО РАН; Геологический институт им. Н.Л. Добрецова СО РАНРоссияSobolev Institute of Geology and Mineralogy, Siberian Branch of the Russian Academy of Sciences; Dobretsov Geological Institute, Siberian Branch of the Russian Academy of SciencesRussian FederationИнститут геологии и минералогии им. В.С. Соболева СО РАНРоссияSobolev Institute of Geology and Mineralogy, Siberian Branch of the Russian Academy of SciencesRussian FederationНовосибирский государственный университет; Институт геохимии им. А.П. Виноградова СО РАНРоссияNovosibirsk State University; Vinogradov Institute of Geochemistry, Siberian Branch of the Russian Academy of SciencesRussian FederationИнститут геологии и минералогии им. В.С. Соболева СО РАН; Новосибирский государственный университетРоссияSobolev Institute of Geology and Mineralogy, Siberian Branch of the Russian Academy of Sciences; Dobretsov Geological Institute, Siberian Branch of the Russian Academy of SciencesRussian FederationГеологический институт им. Н.Л. Добрецова СО РАН; Новосибирский государственный университетРоссияDobretsov Geological Institute, Siberian Branch of the Russian Academy of Sciences; Novosibirsk State UniversityRussian Federation202416022024151741741Copyright © Избродин И.А., Дорошкевич А.Г., Малютина А.В., Семенова Д.В., Радомская Т.А., Крук М.Н., Прокопьев И.Р., Старикова А.Е., Рампилов М.О., 20242024Избродин И.А., Дорошкевич А.Г., Малютина А.В., Семенова Д.В., Радомская Т.А., Крук М.Н., Прокопьев И.Р., Старикова А.Е., Рампилов М.О.Izbrodin I.А., Doroshkevich А.G., Malyutina А.V., Semenova D.V., Radomskaya Т.А., Kruk М.N., Prokopyev I.R., Starikova А.Е., Rampilov М.О.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/1793

Проведены геохронологические исследования пород основных разновидностей щелочного массива Бурпала, а также двух даек габбро, габбро-диоритов, расположенных рядом с массивом. Данные U-Pb LA-SF-ICP-MS изотопного датирования цирконов показали время кристаллизации габбро – 294±2 млн лет, диоритов – 607±4 млн лет, меланократовых щелочных и нефелиновых сиенитов – 298±2 и 296±2 млн лет, кварцевых и кварцсодержащих сиенитов – 291±2 и 293±3 млн лет, щелочных гранитов – 293±3 млн лет. Этап формирования пород комплекса (298–291 млн лет) совпадает с периодом образования щелочных пород Сыннырского плутона и некоторых щелочных комплексов витимского сегмента Забайкалья и подтверждает широкое проявление постколлизионного щелочного магматизма в Западном Забайкалье.

 

Geochronological studies have been made on the main types of rocks from the Burpala alkaline massif and two gabbro and gabbro-diorite dikes located nearby. U-Pb LA-SF-ICP-MS zircon geochronology for the Burpala massif yielded a date of 294±2 Ma for gabbro crystallization, 607±4 Ma for diorite crystallization, 298±2 and 296±2 Ma for melanocratic alkaline and nepheline syenite crustallization, 291±2 and 293±3 for quartz and quartz-containing syenite crystallization, and 293±3 Ma for alkaline granite crystallization. The stage of formation of the massif rocks (298–291 Ma) coincides with the formation period of alkaline rocks from the Synnyr pluton and some alkaline complexes of the Vitim segment of Transbaikalia and confirms a widespread occurrence of post-collisional alkaline magmatism in Western Transbaikalia.

 

массив Бурпаланефелиновые и щелочные сиенитыгаббродиоритU-Pb возрастСеверное ПрибайкальеBurpala massifnepheline and alkaline syenitesgabbrodioriteU-Pb ageNorthern PribaikalyeИзучение геологии района проводилось в рамках госзаданий ИГМ СО РАН (122041400241-5) и ГИН СО РАН (АААА-А21-121011390002-2), изучение вещественного состава и возраста пород – за счет средств РНФ, проект № 22-17-00078.The geological study of the area was performed as part of the state assignments of IGM SB RAS (122041400241-5) and GIN SB RAS (АААА-А21-121011390002-2), the study of composition and age of rocks was funded by the RSF, project 22-17-00078.ReferencesAmelin Y.V., Ritsk E.Y., Neymark L.A., 1997. Effects of Interaction between Ultramafic Tectonite and Mafic Magma on Nd-Pb-Sr Isotopic Systems in the Neoproterozoic Chaya Massif, Baikal-Muya Ophiolite Belt. Earth and Planetary Science Letters 148, (1–2), 299–316. https://doi.org/10.1016/S0012-821X(97)00046-0.Amelin Y.V., Ritsk E.Y., Neymark L.A., 1997. 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The authors declare that there are no conflicts of interest present.