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  • 标题:High-resolution multibeam bathymetry of the northern Mid-Atlantic Ridge at 45–46° N: the Moytirra hydrothermal field
  • 本地全文:下载
  • 作者:Luis Somoza ; Teresa Medialdea ; Francisco J. González
  • 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
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