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- Title
Chemical Microprobe Th–U–Pb Dating of Monazite from Rare Metal Pegmatites of the Burpala Pluton, North Baikal Region.
- Authors
Spivak, A. V.; Sotnikova, I. A.; Viryus, A. A.; Kuzmin, M. I.; Zakharchenko, E. S.; Kolotilina, T. B.; Alymova, N. V.
- Abstract
The chemical composition and zonation of monazite from a rare metal pegmatite dike of the Britholite zone of the Burpala pluton (North Baikal region) is studied with electron microprobe analysis (EMPA). It is established that monazite includes two varieties: Ce and La. The monazite-(Ce) has higher Nd2O3 and ThO2 contents in comparison with monazite-(La). The average weighted chemical Th–U–total Pb isochron age of monazite is 251 ± 31 Ma. The isochron age of monazite is 273 ± 69 Ma. These age values indicate that the pegmatites of the Britholite zone intruded after the pegmatites of the northwestern area and allow the suggestion of several stages of origination of rare metal pegmatites in the pluton.
- Subjects
NONFERROUS metals; PEGMATITES; MONAZITE; ELECTRON probe microanalysis; IGNEOUS intrusions
- Publication
Doklady Earth Sciences, 2024, Vol 514, Issue 1, p70
- ISSN
1028-334X
- Publication type
Article
- DOI
10.1134/S1028334X23602316