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

A. B. Kuznetsov; S. B. Lobach–Zhuchenko; T. V. Kaulina; G. V. Konstantinova

doi:10.1134/S1028334X19020211

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

Authors: Kuznetsov A.B.¹, Lobach–Zhuchenko S.B.¹, Kaulina T.V.², Konstantinova G.V.²
Affiliations:
1. Institute of Precambrian Geology and Geochronology, Russian Academy of Sciences
2. Geological Institute, Kola Science Center, Russian Academy of Sciences
Issue: Vol 484, No 2 (2019)
Pages: 142-145
Section: Geology
URL: https://journals.rcsi.science/1028-334X/article/view/194591
DOI: https://doi.org/10.1134/S1028334X19020211
ID: 194591

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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.