Chemical microprobe Th-U-Pb age dating of monazite from rare-metal pegmatites of the Burpala massif (North Baikal)
- Авторлар: Spivak A.1, Sotnikova I.2, Viryus A.1, Kuzmin M.2, Zakharchenko E.1, Kolotilina T.2, Alymova N.2
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Мекемелер:
- D.S. KorzhinskyInstitute of Experimental Mineralogy, Russian Academy of Sciences
- A. P. Vinogradov Institute of Geochemistry, Siberian Branch of the Russian Academy of Sciences
- Шығарылым: Том 514, № 1 (2024)
- Беттер: 89-96
- Бөлім: ГЕОХИМИЯ
- URL: https://journals.rcsi.science/2686-7397/article/view/257897
- DOI: https://doi.org/10.31857/S2686739724010108
- ID: 257897
Дәйексөз келтіру
Аннотация
The chemical composition and zoning of monazite from a dike of rare-metal pegmatites of the Britholite zone of the Burpala massif (Northern Baikal region) was studied by electron probe microanalysis (EPMA). It has been established that monazites are represented by Ce and La varieties. Grains of monazite-(Ce) are characterized by an increased concentration of Nd2O3 and ThO2 compared to monazite-(La). The weighted average age for monazites, determined by the U-Th-Pb CHIME method, was 251±31 Ma. The age calculated by the isochrone method corresponds to 273±69 Ma. The obtained age values of monazite indicate that the pegmatites of the Britholite zone were intruded after the pegmatites of the northwestern area and suggest the existence of several stages in the formation of rare-metal pegmatites in the massif.
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Авторлар туралы
A. Spivak
D.S. KorzhinskyInstitute of Experimental Mineralogy, Russian Academy of Sciences
Хат алмасуға жауапты Автор.
Email: spivak@iem.ac.ru
Ресей, Chernogolovka
I. Sotnikova
A. P. Vinogradov Institute of Geochemistry, Siberian Branch of the Russian Academy of Sciences
Email: spivak@iem.ac.ru
Ресей, Irkutsk
A. Viryus
D.S. KorzhinskyInstitute of Experimental Mineralogy, Russian Academy of Sciences
Email: spivak@iem.ac.ru
Ресей, Chernogolovka
M. Kuzmin
A. P. Vinogradov Institute of Geochemistry, Siberian Branch of the Russian Academy of Sciences
Email: spivak@iem.ac.ru
Academician of the RAS
Ресей, IrkutskE. Zakharchenko
D.S. KorzhinskyInstitute of Experimental Mineralogy, Russian Academy of Sciences
Email: spivak@iem.ac.ru
Ресей, Chernogolovka
T. Kolotilina
A. P. Vinogradov Institute of Geochemistry, Siberian Branch of the Russian Academy of Sciences
Email: spivak@iem.ac.ru
Ресей, Irkutsk
N. Alymova
A. P. Vinogradov Institute of Geochemistry, Siberian Branch of the Russian Academy of Sciences
Email: spivak@iem.ac.ru
Ресей, Irkutsk
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