Abstract
The absolute age of the Brusilovka paleo-caldera volcanic rocks has been determined for the first time through the LA-ICP-MS U–Pb zircon isotopic dating. The obtained results (~61–56 Ma) are consistent with the Paleocene magmatic stage of the Sikhote-Alin, and the patterns of their structural localization and spatiotemporal distribution are consistent with left-lateral displacements along the Vostochny and Pribrezhny faults. The distribution characteristics of early Paleogene igneous rocks both in the frontal and rear continental-marginal parts of the southern Sikhote-Alin can serve as a basis for paleogeodynamic reconstructions and subsequent metallogenic analysis.
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ACKNOWLEDGMENTS
We are grateful to V.V. Akinin (North-East Interdisciplinary Scientific Research Institute FEB RAS, Magadan) and A.I. Obzhirov (Pacific Oceanological Institute FEB RAS, Vladivostok) for critical comments that significantly improved the manuscript.
Funding
The study was supported by the Russian Science Foundation (project no. 22-27-00223), https://rscf.ru/project/22-27-00223/.
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Grebennikov, A.V., Kasatkin, S.A., Chekryzhov, I.Y. et al. Age and Geodynamic Setting of the Brusilovka Caldera, Sikhote-Alin. Russ. J. of Pac. Geol. 16, 634–639 (2022). https://doi.org/10.1134/S1819714022060045
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DOI: https://doi.org/10.1134/S1819714022060045