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

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Somoza Losada, Luis and Medialdea, Teresa and González, Francisco J. and Machancoses, Sara and Cid, Constantino and Calado, Antonio and Afonso, Andreia and Pinto Ribeiro, Luisa and Blasco, Iker and Albuquerque, Mónica and Asensio Ramos, María and Bettencourt, Renato and Ignacio San José, Cristina de and López Pamo, Enrique and Ramos, Bruno and Rincón-Tomás, Blanca and Santofimia Pastor, Esther and Souto, Miguel and Tojeira, Inês and Viegas, Cláudia and Madureira, Pedro (2021) High-resolution multibeam bathymetry of the northern Mid-Atlantic Ridge at 45–46° N: the Moytirra hydrothermal field. Journal of Maps, 17 (2). pp. 184-196. ISSN 1744-5647

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Official URL: https://doi.org/10.1080/17445647.2021.1898485



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.


Item Type:Article
Uncontrolled Keywords:Multibeam bathymetry; Mid-Atlantic Ridge; Moytirra; hydrothermal vents; seafloor massive sulfides
Subjects:Sciences > Geology > Geodynamics
ID Code:71218
Deposited On:14 Mar 2022 17:47
Last Modified:15 Mar 2022 09:07

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