High-resolution multibeam bathymetry of the northern Mid-Atlantic Ridge at 45–46° N: the Moytirra hydrothermal field

[EN] This work presents a new high-resolution multibeam bathymetric map of a segment of active deep sea-floor spreading in the Atlantic Ocean, the northern Mid-Atlantic Ridge (MAR) at 45–46º N. New high-resolution bathymetry data were acquired using an Atlas multibeam echosounder onboard the researc...

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Detalhes bibliográficos
Autores: Somoza, Luis, Medialdea Cela, Teresa, González Sanz, Francisco Javier, Machancoses, Sara, Candón, Jose A., Cid, Constantino, Calado, Antonio J., Afonso, Andreia, Ribeiro, Luisa Pinto (Portugal), Blasco del Barrio, Íker, Albuquerque, Mónica, Asensio-Ramos, María, Bettencourt, Renato, Ignacio, Cristina de, López Pamo, José Enrique, Ramos, Bruno, Rincón-Tomás, Blanca, Santofimia Pastor, Esther, Souto, Miguel, Tojeira, Inês, Viegas, Claudia, Madureira, Pedro
Formato: artículo
Estado:Versión publicada
Fecha de publicación:2021
País:España
Recursos:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/377424
Acesso em linha:http://hdl.handle.net/10261/377424
https://api.elsevier.com/content/abstract/scopus_id/85103018636
Access Level:acceso abierto
Palavra-chave:Seafloor massive sulfides
Hydrothermal vents
Mid-Atlantic Ridge
Moytirra
Multibeam bathymetry
Descrição
Resumo:[EN] This work presents a new high-resolution multibeam bathymetric map of a segment of active deep sea-floor spreading in the Atlantic Ocean, the northern Mid-Atlantic Ridge (MAR) at 45–46º N. New high-resolution bathymetry data were acquired using an Atlas multibeam echosounder onboard the research vessel Sarmiento de Gamboa during the EXPLOSEA-2 survey in 2019. The final map of the MAR (50 m cell grid size) at the original scale of 1:200,000 shows a segment of 140 × 35 km of the MAR, at water depths from 715 to 3700 m. This new high-resolution bathymetric map allows to better defining the submarine morphology of the Moytirra hydrothermal active field, the only high-temperature field identified between the Azores Archipelago (Portugal) and Iceland. ROV submarine observations reaching the deepest part of the system for the first time show giant anhydrite-sulfide chimneys up to 20 m high, active strong black smokers and polymetallic massive sulfides.

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