THE FIRST SM-ND ISOTOPIC DATA FOR METAMORPHIC ROCKS OF THE GUDJAL BLOCK IN THE EASTERN PART OF BUREYA CONTINENTAL MASSIF
https://doi.org/10.5800/GT-2022-13-1-0574
Abstract
It is the first time that there have been Sm-Nd isotopic geochemical studies conducted into the metamorphic rocks of the Gudjal block considered as a basement protrusion of the Bureya continental massif. It has been found that biotite and garnet-amphibole schists of the Gudjal formation are characterized by strongly negative εNd(0)=–15.7…–17.2 values and Paleoproterozoic values of Nd model age of tNd(DM)=2.4–2.1 Ga. Similar isotopic parameters are also typical of gneissic biotite granodiorites: εNd(0)=–18.7, tNd(DM)=1.8 Ga. Out of orthorocks of the Gudjal block studied, the Neoproterozoic orthogneisses and orthoamphibolites of the Tulovchikha formation and the Neoproterozoic gneiss-granites of the Nyatyngran complex of the Paleoproterozoic model age may be considered as a probable substrate for melts.
Supporting agencies: The studies were done under financial support RFBR (project 21-55-53002-GFEN_a).
About the Authors
R. O. Ovchinnikov
Institute of Geology and Nature Management, Far Eastern Branch of the Russian Academy of Sciences
Russian Federation
Russian Federation
Roman O. Ovchinnikov
1 Relochniy ln, Blagoveshchensk 675000A. A. Sorokin
Institute of Geology and Nature Management, Far Eastern Branch of the Russian Academy of Sciences
Russian Federation
1 Relochniy ln, Blagoveshchensk 675000
Russian Federation
1 Relochniy ln, Blagoveshchensk 675000
V. P. Kovach
Institute of Precambrian geology and geochronology, Russian Academy of Sciences
Russian Federation
2 Makarov Emb, Saint Petersburg, 199034
Russian Federation
2 Makarov Emb, Saint Petersburg, 199034
W. L. Xu
College of Earth Sciences of Jilin University
China
2199 Jianshe St, Changchun 130061
China
2199 Jianshe St, Changchun 130061
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Review
For citations:
Ovchinnikov R.O., Sorokin A.A., Kovach V.P., Xu W.L. THE FIRST SM-ND ISOTOPIC DATA FOR METAMORPHIC ROCKS OF THE GUDJAL BLOCK IN THE EASTERN PART OF BUREYA CONTINENTAL MASSIF. Geodynamics & Tectonophysics. 2022;13(1):0574. (In Russ.) https://doi.org/10.5800/GT-2022-13-1-0574
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