Early Famenian Trachyandesite Magmatism of the Pripyat Paleorift, East European Platform: U–Pb Age and Petrology

Author:

Kuzmenkova O. F.1,Laptsevich A. G.1,Stifeeva M. V.2,Nosova A. A.3,Streltsova G. D.1,Volkova G. D.3,Plax D. P.4,Pospelov A. V.5,Кудряшов Н.М.

Affiliation:

1. State Enterprise “Reseach and Production Center for Geology”, Branch “Institute of Geology”

2. Institute of Precambrian Geology and Geochronology, Russian Academy of Sciences

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

4. Belarusian National Technical University

5. Belarusian State Technological University

Abstract

On the basis of the mineralogical-petrographic and geochemical study of igneous rocks of intermediate composition of the Pripyat complex of the Late Devonian Pripyat-Dnieper magmatism area, two subphases of the Pripyat magmatism phase have been definished: late Fransian (Chernin or Skolodino-Chernin) with potassium specification and early Famennian (Turov-Drozdov (Yelets)) with potassium-sodium specification. For the first time, the U–Pb age of titanite from trachyandesites of the parametric borehole Pribor was obtained for rocks of Pripyat-Dnieper magmatism area at 364 ± 1 Ma. These data confirm the Famennian age of the Yelets subphase of the Pripyat phase of magmatism and make it possible to determine the duration of the magmatic activity of this structure at least 14 Ma taking into account the isotope dating of the earliest phases of magmatism in the Pripyat-Dnieper-Donetsk Paleorift Structure as 388 ± 12 Ma, 383.3 ± 3.8, 384.7 ± 3.9 and 383.6 ± 4.4 Ma in the Azov Region and 381 ± 2 Ma in the Pripyat-Dnieper magmatism area.

Publisher

The Russian Academy of Sciences

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