TY - JOUR

T1 - 230Th/U возраст и палеоботаническая характеристика органогенной толщи из разреза «Илья Пророк» на реке Большая Коша (бассейн Верхней Волги)

AU - Петров, Алексей Юрьевич

AU - Максимов, Федор Евгеньевич

AU - Григорьев, Василий Александрович

AU - Константинов , Евгений Александрович

AU - Кузнецов, Владислав Юрьевич

AU - Арсланов, Хикматулла Адиевич

AU - Левченко, Снежана Богдановна

AU - Карпухина, Наталья Валерьевна

AU - Старикова, Анна Александровна

AU - Баранова, Надежда Григорьевна

N1 - Funding Information: 1 St Petersburg State University, 7–9, Universitetskaya nab., St Petersburg, 199034, Russian Federation 2 Institute of Geography, Russian Academy of Sciences, 29, Staromonetniy per., Moscow, 119017, Russian Federation 3 The Herzen State Pedagogical University of Russia, 48, nab. r. Moiki, St Petersburg, 191186, Russian Federation For citation: Maksimov, F. E., Petrov, A. Yu., Grigoriev, V. A., Konstantinov, E. A., Kuznetsov, V. Yu., Arslanov, Kh. A., Levchenko, S. B., Karpukhina, N. V., Starikova, A. A., Baranova, N. G. (2022). 230Th/U age and paleobotanic description of the organic-rich layer from the “Ilya Prorok” section on the Bol-shaya Kosha River (Upper Volga basin). Vestnik of Saint Petersburg University. Earth Sciences, 67 (2), 243–265. https://doi.org/10.21638/spbu07.2022.203 (In Russian) This article presents new data from geochronological study the lake-bog organic-rich layer from of the “Ilya Prorok” sequence (Upper Volga Basin, Tver Region) that is a one of the reference sections located on the Russian Plain. Ideas concerning the age and climatic conditions of these organic--mineral deposits formation changed significantly over the long history of their study. As a result, the viewpoint about the belonging of this layer to the Likhvin time * The study was carried out with the financial support of the Russian Foundation for Basic Research within the framework of scientific projects No 18-35-00571 and 20-05-00813. Publisher Copyright: © 2022 St. Petersburg University Press. All rights reserved.

PY - 2022

Y1 - 2022

N2 - This article presents new data from geochronological study the lake-bog organic-rich layer from of the “Ilya Prorok” sequence (Upper Volga Basin, Tver Region) that is a one of the reference sections located on the Russian Plain. Ideas concerning the age and climatic conditions of these organic-mineral deposits formation changed significantly over the long history of their study. As a result, the viewpoint about the belonging of this layer to the Likhvin time began to prevail. However, it is still unclear with which marine isotope-oxygen stage (MIS) the Likhvin interglacial can be compared. According to the paleobotanical study of the lake-bog from the Ilya Prorok section, it was confirmed that the lower part of the lake-bog layer can be attributed to the warm phases of the Likhvin interglacial, while its upper half was deposited during the transition to cooling after the interglacial period. For the first time, the radioisotope age of the buried lake-bog deposits of the reference section “Ilya Prorok” have obtained. According to the data of direct 230Th/U dating, the formation of the sequence probably began no earlier than ~ 326–260 Kyr ago. The 230Th/U age of the buried peat bog from its upper half, according to the results of applying the isochronous approximation, can be correlated with the interval ~256–225 Kyr ago. According to these data, the Likhvin deposits were formed no earlier than MIS-9.

AB - This article presents new data from geochronological study the lake-bog organic-rich layer from of the “Ilya Prorok” sequence (Upper Volga Basin, Tver Region) that is a one of the reference sections located on the Russian Plain. Ideas concerning the age and climatic conditions of these organic-mineral deposits formation changed significantly over the long history of their study. As a result, the viewpoint about the belonging of this layer to the Likhvin time began to prevail. However, it is still unclear with which marine isotope-oxygen stage (MIS) the Likhvin interglacial can be compared. According to the paleobotanical study of the lake-bog from the Ilya Prorok section, it was confirmed that the lower part of the lake-bog layer can be attributed to the warm phases of the Likhvin interglacial, while its upper half was deposited during the transition to cooling after the interglacial period. For the first time, the radioisotope age of the buried lake-bog deposits of the reference section “Ilya Prorok” have obtained. According to the data of direct 230Th/U dating, the formation of the sequence probably began no earlier than ~ 326–260 Kyr ago. The 230Th/U age of the buried peat bog from its upper half, according to the results of applying the isochronous approximation, can be correlated with the interval ~256–225 Kyr ago. According to these data, the Likhvin deposits were formed no earlier than MIS-9.

KW - погребенные озерно-болотные отложения, средний плейстоцен, лихвинское межледниковье, уран-ториевый (230Th/U) метод датирования, палеоботанические методы анализа

KW - Middle Pleistocene

KW - Likhvin interglacial

KW - buried lake-bog deposits

KW - palaeobotanical analysis

KW - uranium-thorium ( Th/U) dating method

UR - https://www.mendeley.com/catalogue/22b64f09-e4c4-3f45-9441-51c58281ec48/

UR - http://www.scopus.com/inward/record.url?scp=85141995100&partnerID=8YFLogxK

U2 - 10.21638/spbu07.2022.203

DO - 10.21638/spbu07.2022.203

M3 - статья

VL - 67

SP - 243

EP - 265

JO - Вестник Санкт-Петербургского университета. Науки о Земле

JF - Вестник Санкт-Петербургского университета. Науки о Земле

SN - 1812-9323

IS - 2

ER -