Paleoproterozoic Age of Carbonates and Trondhjemites of the Central Azov Group: Sr Isotope Chemostratigraphy and U–Pb Geochronology


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Abstract

The Sr isotope characteristic of carbonate rocks in the Central Azov Group has been reported (0.70322–0.70352), the Nd model age of silicate sediments has been calculated (2.34–2.31 Ga), and the U–Pb age of trondhjemites (2052 ± 5 Ma) breaking through carbonates was determined. According to the data obtained, the marine sedimentary cover of the Azov block making up the Early Precambrian Sarmatia Continent was formed in the Early Paleoproterozoic 2.23–2.34 Ga ago.

About the authors

A. B. Kuznetsov

Institute of Precambrian Geology and Geochronology, Russian Academy of Sciences

Author for correspondence.
Email: antonbor9@mail.ru
Russian Federation, St. Petersburg, 199034

S. B. Lobach–Zhuchenko

Institute of Precambrian Geology and Geochronology, Russian Academy of Sciences

Email: antonbor9@mail.ru
Russian Federation, St. Petersburg, 199034

T. V. Kaulina

Geological Institute, Kola Science Center, Russian Academy of Sciences

Email: antonbor9@mail.ru
Russian Federation, Apatity, 184200

G. V. Konstantinova

Geological Institute, Kola Science Center, Russian Academy of Sciences

Email: antonbor9@mail.ru
Russian Federation, Apatity, 184200

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