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

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 ves...

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Detalles Bibliográficos
Autores: Somoza Losada, Luis, Medialdea, Teresa, González, Francisco J., Machancoses, Sara, Cid, Constantino, Calado, Antonio, Afonso, Andreia, Pinto Ribeiro, Luisa, Blasco, Iker, Albuquerque, Mónica, Asensio Ramos, María, Bettencourt, Renato, Ignacio San José, Cristina de, López Pamo, Enrique, Ramos, Bruno, Rincón-Tomás, Blanca, Santofimia Pastor, Esther, Souto, Miguel, Tojeira, Inês, Viegas, Cláudia, Madureira, Pedro
Tipo de recurso: artículo
Fecha de publicación:2021
País:España
Institución:Universidad Complutense de Madrid (UCM)
Repositorio:Docta Complutense
Idioma:inglés
OAI Identifier:oai:docta.ucm.es:20.500.14352/6940
Acceso en línea:https://hdl.handle.net/20.500.14352/6940
Access Level:acceso abierto
Palabra clave:551.46.07(261)
Multibeam bathymetry
Mid-Atlantic Ridge
Moytirra
hydrothermal vents
seafloor massive sulfides
Geodinámica
2507 Geofísica
Descripción
Sumario: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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