Early Cambrian age and crustal source of granitoids of the Goryachinsky pluton (North Baikal area): geodynamic implications

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Abstract


The article presents the results of U-Pb in zircon and Nd-isotope study of the adakite granites of the Goryachinsky pluton, exposed along the Baikal coast in the section of termination of the package of shear tectonic plates of the Baikal-Muya belt. The Early Cambrian age of granitoids, which is unusual for the Northern Baikal region, is 545 ± 6 Ma. According to the authors, new geological and isotopic data indicate the formation of the studied granitoids at the final stage of the Late Baikal shear tectogenesis, which caused the manifestation of adakite magmatism within the Baikal-Muya belt.


About the authors

E. Yu. Rytsk

Institute of Precambrian Geology and Geochronology of the Russian Academy of Sciences

Author for correspondence.
Email: axel-foley@yandex.ru

Russian Federation, 2, Makarova embankment, St.Petersburg, 199034

E. B. Sal'nikova

Institute of Precambrian Geology and Geochronology of the Russian Academy of Sciences

Email: axel-foley@yandex.ru

Russian Federation, 2, Makarova embankment, St.Petersburg, 199034

V. V. Yarmolyuk

Institute of Geology of Ore Deposits, Petrography, Mineralogy and Geochemistry of the Russian Academy of Sciences

Email: axel-foley@yandex.ru

Russian Federation, 35, Staromonetny, Moscow, 119017

Academician of the RAS

A. A. Andreev

Institute of Geology of Ore Deposits, Petrography, Mineralogy and Geochemistry of the Russian Academy of Sciences

Email: axel-foley@yandex.ru

Russian Federation, 35, Staromonetny, Moscow, 119017

E. S. Bogomolov

Institute of Geology of Ore Deposits, Petrography, Mineralogy and Geochemistry of the Russian Academy of Sciences

Email: axel-foley@yandex.ru

Russian Federation, 35, Staromonetny, Moscow, 119017

Yu. M. Lebedeva

Institute of Precambrian Geology and Geochronology of the Russian Academy of Sciences

Email: axel-foley@yandex.ru

Russian Federation, 2, Makarova embankment, St.Petersburg, 199034

S. D. Velikoslavinskii

Institute of Precambrian Geology and Geochronology of the Russian Academy of Sciences

Email: axel-foley@yandex.ru

Russian Federation, 2, Makarova embankment, St.Petersburg, 199034

I. V. Anisimova

Institute of Precambrian Geology and Geochronology of the Russian Academy of Sciences

Email: axel-foley@yandex.ru

Russian Federation, 2, Makarova embankment, St.Petersburg, 199034

Yu. V. Plotkina

Institute of Precambrian Geology and Geochronology of the Russian Academy of Sciences

Email: axel-foley@yandex.ru

Russian Federation, 2, Makarova embankment, St.Petersburg, 199034

A. M. Fedoseenko

Institute of Precambrian Geology and Geochronology of the Russian Academy of Sciences

Email: axel-foley@yandex.ru

Russian Federation, 2, Makarova embankment, St.Petersburg, 199034

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