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标题：High-resolution multibeam bathymetry of the northern Mid-Atlantic Ridge at 45–46° N: the Moytirra hydrothermal field
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作者：Luis Somoza ; Teresa Medialdea ; Francisco J. González 等
期刊名称：Journal of Maps
印刷版ISSN：1744-5647
出版年度：2021
卷号：17
期号：2
页码：184-196
DOI：10.1080/17445647.2021.1898485
出版社：Journal of Maps
摘要：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.
关键词：Multibeam bathymetry ; Mid-Atlantic Ridge ; Moytirra ; hydrothermal vents ; seafloor massive sulfides