Abstract
Speleothems are unique archives of information on climate, geomagnetism, and environmental conditions of the past, and have been successfully used for paleoclimatic and paleomagnetic studies in the last two decades. The uniqueness of these geological objects lies in the peculiarities of their formation and preservation of a wide range of geochemical, geological and geophysical proxies, and, most importantly, in the ability to obtain time series of the corresponding characteristics in an unprecedentedly accurate resolution using isotope-geochronological dating methods and incremental chronology. This paper presents the first results of dating the Vor speleothem from the Vorontsovskaya Cave (Krasnodar region), which preserved a record of the geomagnetic excursion, obtained by 230Th/U α-spectrometry, 14C dating, and incremental chronology. Such studies have been carried out in Russia for the first time. Despite the limitations of using the methods of isotope geochronology, it was possible to obtain an upper limit on the age of the excursion, which probably occurred no earlier than 5500–6000 years ago. By the method of incremental chronology, the duration of the main phase of the excursion Vor – 871 ± 16 years – was determined with great accuracy.
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ACKNOWLEDGMENTS
The authors would like to thank Victoria Bertovna Ershova for assistance in microscopic studies and Alexey Nikolaevich Didenko for careful review of this work.
Funding
The studies were supported by Russian Science Foundation grant no. 22-27-00453 and were carried out using the equipment of the Petrophysics, Geomechanics, and Paleomagnetism Research Center of the Institute of Physics of the Russian Academy of Sciences.
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Gavriyshkin, D.A., Maksimov, F.E., Pasenko, A.M. et al. First Results of Complex Dating and Growth Rate Estimation of Speleothem from Vorontsovskaya Cave (Krasnodar Region, Russia). Dokl. Earth Sc. 513, 1349–1355 (2023). https://doi.org/10.1134/S1028334X23602092
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DOI: https://doi.org/10.1134/S1028334X23602092