Somoza Losada, LuisMedialdea, TeresaGonzález, Francisco J.Machancoses, SaraCid, ConstantinoCalado, AntonioAfonso, AndreiaPinto Ribeiro, LuisaBlasco, IkerAlbuquerque, MónicaAsensio Ramos, MaríaBettencourt, RenatoIgnacio San José, Cristina deLópez Pamo, EnriqueRamos, BrunoRincón-Tomás, BlancaSantofimia Pastor, EstherSouto, MiguelTojeira, InêsViegas, CláudiaMadureira, Pedro2023-06-172023-06-1720211744-564710.1080/17445647.2021.1898485https://hdl.handle.net/20.500.14352/6940This 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.engAtribución 3.0 Españajournal articlehttps://doi.org/10.1080/17445647.2021.1898485open access551.46.07(261)Multibeam bathymetryMid-Atlantic RidgeMoytirrahydrothermal ventsseafloor massive sulfidesGeodinámica2507 Geofísica