Unveiling the contourite depositional system in the Vema Fracture Zone (Central Atlantic)
Abstract A combination of a high sediment input and intense bottom currents often leads to the formation of contourites (sediments deposited or significantly reworked by bottom currents). Both of these components are present in the Vema Fracture Zone valley which is the most important passageway for...
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ftdoajarticles:oai:doaj.org/article:80ff27800aac484980ed244f1fca81b7 2023-10-01T03:51:24+02:00 Unveiling the contourite depositional system in the Vema Fracture Zone (Central Atlantic) Dmitrii G. Borisov Dmitry I. Frey Elena V. Ivanova Nikolay N. Dmitrevskiy Oleg V. Levchenko Vladimir V. Fomin Marco Ligi 2023-08-01T00:00:00Z https://doi.org/10.1038/s41598-023-40401-4 https://doaj.org/article/80ff27800aac484980ed244f1fca81b7 EN eng Nature Portfolio https://doi.org/10.1038/s41598-023-40401-4 https://doaj.org/toc/2045-2322 doi:10.1038/s41598-023-40401-4 2045-2322 https://doaj.org/article/80ff27800aac484980ed244f1fca81b7 Scientific Reports, Vol 13, Iss 1, Pp 1-12 (2023) Medicine R Science Q article 2023 ftdoajarticles https://doi.org/10.1038/s41598-023-40401-4 2023-09-03T00:54:50Z Abstract A combination of a high sediment input and intense bottom currents often leads to the formation of contourites (sediments deposited or significantly reworked by bottom currents). Both of these components are present in the Vema Fracture Zone valley which is the most important passageway for the distribution of the Antarctic Bottom Water from the West to the North-East of the Atlantic. However, no contourite drifts, moats or contourite channels have been found in this region in more than half a century of research. The prevailing sedimentation paradigm postulates that turbidity currents have predominantly governed sedimentation in this region during the Pleistocene. This work describes the first example of contourite depositional system identified in the Vema Fracture Zone. The discovery was made through detailed high-resolution sub-bottom profiling, as well as numerical modeling and direct measurements of bottom current velocities. Such systems are exceptionally uncommon in fracture zones. This study highlights the importance of further research of contourites along the Vema Fracture Zone based on modern concepts of contourite and mixed depositional systems. The work also emphasizes the need to reevaluate the impact of bottom currents on sedimentation in this region, and particularly in the narrow segments of the fracture zone valley. Article in Journal/Newspaper Antarc* Antarctic Directory of Open Access Journals: DOAJ Articles Antarctic The Antarctic Scientific Reports 13 1 |
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Medicine R Science Q Dmitrii G. Borisov Dmitry I. Frey Elena V. Ivanova Nikolay N. Dmitrevskiy Oleg V. Levchenko Vladimir V. Fomin Marco Ligi Unveiling the contourite depositional system in the Vema Fracture Zone (Central Atlantic) |
topic_facet |
Medicine R Science Q |
description |
Abstract A combination of a high sediment input and intense bottom currents often leads to the formation of contourites (sediments deposited or significantly reworked by bottom currents). Both of these components are present in the Vema Fracture Zone valley which is the most important passageway for the distribution of the Antarctic Bottom Water from the West to the North-East of the Atlantic. However, no contourite drifts, moats or contourite channels have been found in this region in more than half a century of research. The prevailing sedimentation paradigm postulates that turbidity currents have predominantly governed sedimentation in this region during the Pleistocene. This work describes the first example of contourite depositional system identified in the Vema Fracture Zone. The discovery was made through detailed high-resolution sub-bottom profiling, as well as numerical modeling and direct measurements of bottom current velocities. Such systems are exceptionally uncommon in fracture zones. This study highlights the importance of further research of contourites along the Vema Fracture Zone based on modern concepts of contourite and mixed depositional systems. The work also emphasizes the need to reevaluate the impact of bottom currents on sedimentation in this region, and particularly in the narrow segments of the fracture zone valley. |
format |
Article in Journal/Newspaper |
author |
Dmitrii G. Borisov Dmitry I. Frey Elena V. Ivanova Nikolay N. Dmitrevskiy Oleg V. Levchenko Vladimir V. Fomin Marco Ligi |
author_facet |
Dmitrii G. Borisov Dmitry I. Frey Elena V. Ivanova Nikolay N. Dmitrevskiy Oleg V. Levchenko Vladimir V. Fomin Marco Ligi |
author_sort |
Dmitrii G. Borisov |
title |
Unveiling the contourite depositional system in the Vema Fracture Zone (Central Atlantic) |
title_short |
Unveiling the contourite depositional system in the Vema Fracture Zone (Central Atlantic) |
title_full |
Unveiling the contourite depositional system in the Vema Fracture Zone (Central Atlantic) |
title_fullStr |
Unveiling the contourite depositional system in the Vema Fracture Zone (Central Atlantic) |
title_full_unstemmed |
Unveiling the contourite depositional system in the Vema Fracture Zone (Central Atlantic) |
title_sort |
unveiling the contourite depositional system in the vema fracture zone (central atlantic) |
publisher |
Nature Portfolio |
publishDate |
2023 |
url |
https://doi.org/10.1038/s41598-023-40401-4 https://doaj.org/article/80ff27800aac484980ed244f1fca81b7 |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
Scientific Reports, Vol 13, Iss 1, Pp 1-12 (2023) |
op_relation |
https://doi.org/10.1038/s41598-023-40401-4 https://doaj.org/toc/2045-2322 doi:10.1038/s41598-023-40401-4 2045-2322 https://doaj.org/article/80ff27800aac484980ed244f1fca81b7 |
op_doi |
https://doi.org/10.1038/s41598-023-40401-4 |
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Scientific Reports |
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13 |
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1 |
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1778535128867274752 |