The Alpha Crucis Carbonate Ridge (ACC R): Discovery of a giant ringshaped carbonate complex on the SW Atlantic margin
Recently acquired bathymetric and high-resolution seismic data from the upper slope of Santos Basin, southern Brazilian margin, reveal a major geomorphological feature in the SW Atlantic that is interpreted as a carbonate ridge - the Alpha Crucis Carbonate Ridge (ACCR). The ACCR is the first megastr...
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Online Access: | http://hdl.handle.net/10481/58600 https://doi.org/10.1038/s41598-019-55226-3 |
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ftunivgranada:oai:digibug.ugr.es:10481/58600 2023-05-15T13:41:17+02:00 The Alpha Crucis Carbonate Ridge (ACC R): Discovery of a giant ringshaped carbonate complex on the SW Atlantic margin Maly, Mascimiliano Lobo, Francisco José 2019 application/pdf http://hdl.handle.net/10481/58600 https://doi.org/10.1038/s41598-019-55226-3 eng eng Springer Nature Maly, M., Schattner, U., Lobo, F. J., Dias, R. J. S., Ramos, R. B., de Matos Couto, D., . & de Mahiques, M. M. (2019). The Alpha Crucis Carbonate Ridge (ACCR): Discovery of a giant ring-shaped carbonate complex on the SW Atlantic margin. Scientific Reports, 9(1), 1-10. http://hdl.handle.net/10481/58600 doi:10.1038/s41598-019-55226-3 Atribución 3.0 España http://creativecommons.org/licenses/by/3.0/es/ info:eu-repo/semantics/openAccess CC-BY info:eu-repo/semantics/article 2019 ftunivgranada https://doi.org/10.1038/s41598-019-55226-3 2020-01-18T10:10:27Z Recently acquired bathymetric and high-resolution seismic data from the upper slope of Santos Basin, southern Brazilian margin, reveal a major geomorphological feature in the SW Atlantic that is interpreted as a carbonate ridge - the Alpha Crucis Carbonate Ridge (ACCR). The ACCR is the first megastructure of this type described on the SW Atlantic margin. The ~17 × 11-km-wide ring-shaped ACC R features tens of >100-m-high steep-sided carbonate mounds protruding from the surrounding seabed and flanked by elongated depressions. Comet-like marks downstream of the mound structures indicate that the area is presently influenced by the northward flow of the Intermediate Western Boundary Current (IWBC), a branch of the Subtropical Gyre that transports Antarctic Intermediate Water. Abundant carbonate sands and gravels cover the mounds and are overlain by a biologically significant community of living and dead ramified corals and associated invertebrates. The IWBC acts as a hydrodynamic factor that is responsible for both shaping the bottom and transporting coral larvae. We contend that the ACCR was formed by upward fluid flow along active sub-surface faults and fractures that formed by lateral extension generated by the ascending movement of salt diapirs at depth. The ACC R provides an important modern and accessible analogue for a seabed carbonate build-up related to sub-surface hydrocarbon systems. Acknowledgements are also due to the São Paulo Science Foundation (FAPESP grants 2014/08266-2, 2015/17763-2, and 2016/22194-0). MMdeM acknowledges the Brazilian National Research Council (CNPq, grant 300962/2018-5). The partnership between MMdeM and the US was supported by FAPESP (grant 2017/50191-8 – SPRINT Program). The partnership between MMdeM and F.J.L. was supported by CNPq (grant 401041/2014-0). The authors gratefully acknowledge support from Shell Brasil through the BIOIL project at the Oceanographic Institute of the University of São Paulo and the strategic importance of the support given by ANP through R&D levy regulation. Article in Journal/Newspaper Antarc* Antarctic DIGIBUG: Repositorio Institucional de la Universidad de Granada Antarctic Levy ENVELOPE(-66.567,-66.567,-66.320,-66.320) Scientific Reports 9 1 |
institution |
Open Polar |
collection |
DIGIBUG: Repositorio Institucional de la Universidad de Granada |
op_collection_id |
ftunivgranada |
language |
English |
description |
Recently acquired bathymetric and high-resolution seismic data from the upper slope of Santos Basin, southern Brazilian margin, reveal a major geomorphological feature in the SW Atlantic that is interpreted as a carbonate ridge - the Alpha Crucis Carbonate Ridge (ACCR). The ACCR is the first megastructure of this type described on the SW Atlantic margin. The ~17 × 11-km-wide ring-shaped ACC R features tens of >100-m-high steep-sided carbonate mounds protruding from the surrounding seabed and flanked by elongated depressions. Comet-like marks downstream of the mound structures indicate that the area is presently influenced by the northward flow of the Intermediate Western Boundary Current (IWBC), a branch of the Subtropical Gyre that transports Antarctic Intermediate Water. Abundant carbonate sands and gravels cover the mounds and are overlain by a biologically significant community of living and dead ramified corals and associated invertebrates. The IWBC acts as a hydrodynamic factor that is responsible for both shaping the bottom and transporting coral larvae. We contend that the ACCR was formed by upward fluid flow along active sub-surface faults and fractures that formed by lateral extension generated by the ascending movement of salt diapirs at depth. The ACC R provides an important modern and accessible analogue for a seabed carbonate build-up related to sub-surface hydrocarbon systems. Acknowledgements are also due to the São Paulo Science Foundation (FAPESP grants 2014/08266-2, 2015/17763-2, and 2016/22194-0). MMdeM acknowledges the Brazilian National Research Council (CNPq, grant 300962/2018-5). The partnership between MMdeM and the US was supported by FAPESP (grant 2017/50191-8 – SPRINT Program). The partnership between MMdeM and F.J.L. was supported by CNPq (grant 401041/2014-0). The authors gratefully acknowledge support from Shell Brasil through the BIOIL project at the Oceanographic Institute of the University of São Paulo and the strategic importance of the support given by ANP through R&D levy regulation. |
format |
Article in Journal/Newspaper |
author |
Maly, Mascimiliano Lobo, Francisco José |
spellingShingle |
Maly, Mascimiliano Lobo, Francisco José The Alpha Crucis Carbonate Ridge (ACC R): Discovery of a giant ringshaped carbonate complex on the SW Atlantic margin |
author_facet |
Maly, Mascimiliano Lobo, Francisco José |
author_sort |
Maly, Mascimiliano |
title |
The Alpha Crucis Carbonate Ridge (ACC R): Discovery of a giant ringshaped carbonate complex on the SW Atlantic margin |
title_short |
The Alpha Crucis Carbonate Ridge (ACC R): Discovery of a giant ringshaped carbonate complex on the SW Atlantic margin |
title_full |
The Alpha Crucis Carbonate Ridge (ACC R): Discovery of a giant ringshaped carbonate complex on the SW Atlantic margin |
title_fullStr |
The Alpha Crucis Carbonate Ridge (ACC R): Discovery of a giant ringshaped carbonate complex on the SW Atlantic margin |
title_full_unstemmed |
The Alpha Crucis Carbonate Ridge (ACC R): Discovery of a giant ringshaped carbonate complex on the SW Atlantic margin |
title_sort |
alpha crucis carbonate ridge (acc r): discovery of a giant ringshaped carbonate complex on the sw atlantic margin |
publisher |
Springer Nature |
publishDate |
2019 |
url |
http://hdl.handle.net/10481/58600 https://doi.org/10.1038/s41598-019-55226-3 |
long_lat |
ENVELOPE(-66.567,-66.567,-66.320,-66.320) |
geographic |
Antarctic Levy |
geographic_facet |
Antarctic Levy |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_relation |
Maly, M., Schattner, U., Lobo, F. J., Dias, R. J. S., Ramos, R. B., de Matos Couto, D., . & de Mahiques, M. M. (2019). The Alpha Crucis Carbonate Ridge (ACCR): Discovery of a giant ring-shaped carbonate complex on the SW Atlantic margin. Scientific Reports, 9(1), 1-10. http://hdl.handle.net/10481/58600 doi:10.1038/s41598-019-55226-3 |
op_rights |
Atribución 3.0 España http://creativecommons.org/licenses/by/3.0/es/ info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1038/s41598-019-55226-3 |
container_title |
Scientific Reports |
container_volume |
9 |
container_issue |
1 |
_version_ |
1766148627631177728 |