Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
Strontium Isotope Composition in Limestones of the Dal’nyaya Taiga Group in the Patom Basin : Vendian Reference Section of Siberia. / Rud’ko, S. V.; Kuznetsov, A. B.; Petrov, P. Yu.
в: Lithology and Mineral Resources, Том 55, № 3, 01.05.2020, стр. 206-217.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - Strontium Isotope Composition in Limestones of the Dal’nyaya Taiga Group in the Patom Basin
T2 - Vendian Reference Section of Siberia
AU - Rud’ko, S. V.
AU - Kuznetsov, A. B.
AU - Petrov, P. Yu
N1 - Publisher Copyright: © 2020, Pleiades Publishing, Inc. Copyright: Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2020/5/1
Y1 - 2020/5/1
N2 - Abstract: New data on the 87Sr/86Sr ratio variations in carbonate rocks of the Dal’nyaya Taiga Group in the Vendian reference section (Ura Uplift, Central Siberia) are presented. The 87Sr/86Sr variations correlate with the sequence-stratigraphic scheme reflecting evolution of the paleobasin, δ13C variations, and paleontological data. Limestones with a high (>1050 µg/g) Sr concentration, which do not show any signs of alteration of the Sr isotope system, were used for reconstructing the secular 87Sr/86Sr variations. Increase in the 87Sr/86Sr ratio from 0.70755 to 0.70823 complicated by subordinate fluctuations was established in seawater during the accumulation of the Dal’nyaya Taiga Group carbonate rocks. Duration of the postglacial deposition of the Dal’nyaya Taiga Group is estimated at no less than 14–15 Ma. Secular variations of the 87Sr/86Sr ratio measured in the Dal’nyaya Taiga Group limestones are similar to changes of this ratio after the Marinoan glacial period. The Sr and C isotope correlations suggest a prolonged hiatus between the Dal’nyaya Taiga and Zhuya groups.
AB - Abstract: New data on the 87Sr/86Sr ratio variations in carbonate rocks of the Dal’nyaya Taiga Group in the Vendian reference section (Ura Uplift, Central Siberia) are presented. The 87Sr/86Sr variations correlate with the sequence-stratigraphic scheme reflecting evolution of the paleobasin, δ13C variations, and paleontological data. Limestones with a high (>1050 µg/g) Sr concentration, which do not show any signs of alteration of the Sr isotope system, were used for reconstructing the secular 87Sr/86Sr variations. Increase in the 87Sr/86Sr ratio from 0.70755 to 0.70823 complicated by subordinate fluctuations was established in seawater during the accumulation of the Dal’nyaya Taiga Group carbonate rocks. Duration of the postglacial deposition of the Dal’nyaya Taiga Group is estimated at no less than 14–15 Ma. Secular variations of the 87Sr/86Sr ratio measured in the Dal’nyaya Taiga Group limestones are similar to changes of this ratio after the Marinoan glacial period. The Sr and C isotope correlations suggest a prolonged hiatus between the Dal’nyaya Taiga and Zhuya groups.
KW - chemostratigraphy
KW - secular variations
KW - Siberia
KW - strontium isotopes
KW - Vendian
UR - http://www.scopus.com/inward/record.url?scp=85084496373&partnerID=8YFLogxK
U2 - 10.1134/S0024490220030050
DO - 10.1134/S0024490220030050
M3 - Article
AN - SCOPUS:85084496373
VL - 55
SP - 206
EP - 217
JO - Lithology and Mineral Resources
JF - Lithology and Mineral Resources
SN - 0024-4902
IS - 3
ER -
ID: 75949680