Email this article DATING OF THE SEDIMENTARY COVER REFLECTORS AND EVALUATION OF THE SEDIMENTATION RATES IN LATE PLIOCENE–QUATERNARY IN THE KING TROUGH AND VICINITY (NORTH ATLANTIC)
- Authors: Bogoliubskii V.A.1, Sokolov S.Y.2, Denisova A.P.1, Dobroliubova K.O.1
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Affiliations:
- Федеральное государственное бюджетное учреждение науки Геологический институт Российской академии наук
- Geological Institute of Russian Academy of Sciences (GIN RAS)
- Section: GEOLOGY
- Submitted: 17.03.2025
- Accepted: 24.03.2025
- Published: 11.06.2025
- URL: https://bakhtiniada.ru/2686-7397/article/view/283789
- ID: 283789
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Abstract
Based on the results of the 55th and 57th cruises of the R/V "Akademik Nikolai Strakhov", seismoacoustic profiling data of the upper part of the sedimentary cover were obtained in the area of the King Trough mesostructural complex (eastern flank of the SAH). Reference reflectors were identified from the seismoacoustic sections and correlated with the DSDP 608 and IODP U1312 deep-sea drilling holes. The sections cover the entire Quaternary sediment record (glacial cycles) and part of the Upper Pliocene sediment record. As a result of the work, sedimentation rates within the different structures of the King Trough were calculated. During the last 1.5 Ma, sedimentation rates have been slightly different throughout the area from average sedimentation rates in the World Ocean , whereas earlier rates were several times higher than average ones. There is a period of sharply increased sedimentation rates (up to 180 m/My) at ca. 1.5 Ma, which may be related to abrupt climatic changes and ocean level fluctuations. Prior to the onset of the Mid-Pleistocene Transition at 1.5 Ma, a bottom current probably ran along the bottom of the western part of the King Trough, causing high sedimentation rates in the bottom of the trough. The current stopped after the onset of the climatic transition, which could be due to regional restructuring of the Atlantic Meridional Overturning Circulation. These conclusions are correlated with sedimentation rates and changes in ocean surface temperature based on data from IODP U1313.
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About the authors
Vyacheslav Andreevich Bogoliubskii
Федеральное государственное бюджетное учреждение науки Геологический институт Российской академии наук
Email: bogolubskiyv@gmail.com
Russian Federation, 119017 Москва, Пыжевский пер, 7, стр.1
Sergey Yurievich Sokolov
Geological Institute of Russian Academy of Sciences(GIN RAS)
Author for correspondence.
Email: sysokolov@yandex.ru
ORCID iD: 0000-0002-7197-852X
http://atlantic.ginras.ru/staff/sokolov/sy_sokolov.html
Отдел Геологический институт РАН
Лаборатория геоморфологии и тектоники дна океанов
Заведующий лабораторией, Главный научный сотрудник
Доктор геолого-минералогических наук
Russian FederationAnna Pavlovna Denisova
Федеральное государственное бюджетное учреждение науки Геологический институт Российской академии наук
Email: anden6900@gmail.com
119017 Москва, Пыжевский пер, 7, стр.1
Ksenia Olegovna Dobroliubova
Федеральное государственное бюджетное учреждение науки Геологический институт Российской академии наук
Email: k_dobrolubova@mail.ru
119017 Москва, Пыжевский пер, 7, стр.1
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