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| Atlantis Seamount | |
|---|---|
| Name | Atlantis Seamount |
| Location | Atlantic Ocean |
| Type | Seamount |
Atlantis Seamount Atlantis Seamount is an undersea volcanic edifice located in the North Atlantic Ocean. It rises from abyssal plains and interacts with regional currents, pelagic ecosystems, and deep-sea sedimentary processes. The feature has been the focus of multidisciplinary studies involving oceanography, marine biology, volcanology, and geophysics.
The seamount sits on the North Atlantic Ocean abyssal plain near the Mid-Atlantic Ridge, bounded by tectonic domains such as the Iceland hotspot, the Azores Triple Junction, and the continental margins of Europe and North America. Its summit-to-base relief, flank slopes, and summit plateau have been described using multibeam bathymetry from expeditions by vessels including RRS James Cook, RV Knorr, RV Polarstern, NOAA ship Okeanos Explorer, and R/V Atlantis. Mapping campaigns used instruments developed by institutions like the Woods Hole Oceanographic Institution, the Scripps Institution of Oceanography, and the National Oceanography Centre. Morphological features include steep escarpments, guyot-like flat tops, radial rift zones reminiscent of structures documented at Hawaii and Canary Islands, and mass-wasting scars comparable to collapse features on Rockall Bank and the Charlie-Gibbs Fracture Zone.
Interpretations of the seamount's genesis invoke hotspot-ridge interactions similar to models for Iceland and the Azores. Geochemical analyses of recovered basalts and alkalic lavas employed techniques standardized by laboratories at the Geological Survey of Canada, the British Geological Survey, and the US Geological Survey. Radiometric ages were obtained using facilities at the Max Planck Institute for Chemistry and the Lamont–Doherty Earth Observatory. Volcanic stratigraphy records episodic effusive and explosive activity with pillow basalts, hyaloclastites, and tephra deposits comparable to sequences from Surtsey and Eyjafjallajökull. Tectonic context includes interaction with transform faults such as the Azores-Gibraltar Transform and fracture zones like the Charlie-Gibbs Fracture Zone; seismicity and mantle tomography studies reference datasets from IRIS and the European Seismological Commission.
Biological communities associated with the seamount include sessile suspension feeders, demersal fishes, and chemosynthetic assemblages analogous to those described at the Mid-Atlantic Ridge and the Azores hydrothermal fields. Remotely operated vehicle surveys conducted by teams from Monterey Bay Aquarium Research Institute, Ifremer, and the Alfred Wegener Institute documented structural habitats: cold-water corals including species known from Lophelia pertusa reefs, sponges akin to those in Porcupine Bank, and mobile fauna such as orange roughy-like fishes and cephalopods comparable to species observed by the National Oceanic and Atmospheric Administration. Benthic infauna and meiofauna show affinities with deep-sea assemblages studied at Rockall Trough, Porcupine Seabight, and the Blake Plateau. Trophic linkages were inferred using stable isotope and DNA barcoding protocols developed at CSIC and the University of Copenhagen.
The seamount modifies regional circulation, interacting with currents such as the North Atlantic Current, the Gulf Stream, and associated eddies studied by programs like ARGO and OSNAP. Upwelling and internal wave phenomena concentrate plankton and nepheloid layers, enhancing deposition of biogenic sediments akin to those in the Sargasso Sea and the Madeira Abyssal Plain. Sediment cores analyzed using biostratigraphy and paleomagnetism at the Bristol University and the University of Bergen reveal hemipelagic drape, turbidites comparable to deposits in the Rockall Trough, and ash layers correlated with eruptions cataloged at Iceland Volcanic Observatory and the Global Volcanism Program. Particle fluxes were measured by time-series moorings similar to arrays deployed by the National Oceanography Centre and NOAA.
Exploration of the seamount has been enabled by submersibles and platforms including Alvin (DSV), ROV Jason, HOV Nautile, ROV Victor 6000, and autonomous vehicles from WHOI and MBARI. Studies have been funded and coordinated by agencies such as the National Science Foundation, the European Research Council, NASA (for technological development), and national research councils of Portugal, Spain, and France. Scientific output appears in journals and outlets including Nature Geoscience, Science, Geology, Deep-Sea Research, and reports from the International Seabed Authority for comparative policy context. Collaborative cruises combined geophysical surveys, coring, biological sampling, and in situ experiments pioneered by teams at the Smithsonian Institution and the Natural History Museum, London.
Management considerations for the seamount involve fisheries oversight similar to frameworks applied at Rockall Bank and Seamounts of the Southwest Indian Ridge, and biodiversity protection strategies articulated by the Convention on Biological Diversity and the United Nations Convention on the Law of the Sea. Proposals for marine protected areas reference precedents like the Northeast Canyons and Seamounts Marine National Monument and regional measures by the European Union and North Atlantic Fisheries Organization. Monitoring approaches employ technologies endorsed by the Global Ocean Observing System and governance models discussed at meetings of the International Maritime Organization and the International Seabed Authority. Scientific stewardship engages museums and universities, drawing on capacity building initiatives led by the Intergovernmental Oceanographic Commission and nongovernmental organizations such as The Nature Conservancy and Oceana.
Category:Seamounts