1. The Vendian age of granodiorites and plagiogranites of the Tallainskii complex (Baikal-Muya Belt): U-Pb isotope data.
- Author
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Glebovitsky, V., Rytsk, E., Salnikova, E., Velikoslavinsky, S., Fedoseenko, A., Plotkina, Yu., and Alekseev, I.
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GEOCHRONOMETRY , *GRANODIORITE , *GRANITE , *LEAD isotopes , *URANIUM isotopes , *ZIRCON analysis , *GEOCHEMISTRY , *PALEOGEOGRAPHY - Abstract
This work presents the results of U-Pb isotope dating of zircons from granodiorites and plagiogranites of the Tallainskii gabbro-granodiorite-plagiogranite complex of the Karalon-Mamakan zone of the Baikal-Muya belt, ascribed to the Tallainskii pluton. The age datings obtained for granodiorite of the Eleninskii massif (605 ± 6 Ma) and plagiogranite of the Ust-Berezovo massif (609 ± 6 Ma) are in close agreement within the limits of error. Taking into account previously published data, the emplacement of the Tallainskii complex occurred within the age interval of 615-603 Ma in connection with postcollision extension. The 'island arc' geochemical characteristics of granodiorites and plagiogranites can be explained by magmatic differentiation and (or) participation in the formation of a melt source enriched in the suprasubduction component involved in petrogenesis during the preceding Neoproterozoic period. [ABSTRACT FROM AUTHOR]
- Published
- 2017
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