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Title: High-resolution multibeam bathymetry of the northern Mid-Atlantic Ridge at 45–46° N: the Moytirra hydrothermal field
Authors: Somoza, Luis
Medialdea, Teresa
González, Javier
Marchancoses, Sara
Candón, Jose
Cid, Constantino
Calado, António
Afonso, Andreia
Pinto Ribeiro, Luísa
Blasco, Iker
Albiquerque, Mónica
Ascensio-Ramos, María
Bettencourt, Renato
De Ignacio, Cristina
Ramos, Bruno
Rincón-Tomás, Blanca
Santofimia, Esther
Souto, Miguel
Tojeira, Inês
Viegas, Cláudia
Madureira, Pedro
Keywords: Multibeam bathymetry
Mid-Atlantic Ridge
hydrothermal vents
seafloor massive sulfides
Issue Date: 2021
Abstract: 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.
Type: article
Appears in Collections:GEO - Publicações - Artigos em Revistas Internacionais Com Arbitragem Científica

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