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Polymetallic Nodules

All articles tagged with #polymetallic nodules

planet-earth4 hours ago•72 min saved

Experts challenge deep-sea 'dark oxygen' claim, call for retracting 2024 study

A 2024 study claimed that deep-sea polymetallic nodules could generate oxygen in total darkness via seawater electrolysis, but a December 2025 opinion article from marine scientists and electrochemists argues the results are flawed and likely artifacts, citing improper chamber ventilation, absence of negative controls, missing hydrogen data, and a thermodynamics violation; the authors defend their work and plan a spring CCZ expedition to test the phenomenon, but many experts say the study should be retracted unless the evidence is revised.

via Live Science|

#dark-oxygen #deep-sea #deep-sea-mining

science15 days ago•6 min saved

Deep-Sea Nodules May Generate Oxygen Without Sunlight

Researchers found oxygen concentrations rising inside sealed patches of seafloor more than 4,000 meters deep in the Pacific, suggesting a form of “dark oxygen” produced by electrolysis within polymetallic nodules rather than photosynthesis, a discovery with implications for ocean chemistry and debates over deep-sea mining.

via The Daily Galaxy|

#clarion-clipperton-zone #dark-oxygen #deep-sea-chemistry

science1 month ago•5 min saved

Deep-Sea Mission Set to Verify Dark Oxygen From Ocean Nodules

Scientists plan two 11-km-deep landers in the Clarion-Clipperton Zone to test whether metallic seabed nodules emit oxygen, a controversial claim dubbed 'dark oxygen.' The study, which could reshape ideas about life's origins, will measure seafloor respiration and rule out buoyant air artefacts while contending with mining industry skepticism; results are expected within days of deployment, with broader analyses following the ship’s June return.

via ScienceAlert|

#clarion-clipperton-zone #dark-oxygen #deep-sea-mining

science2 months ago•4 min saved

Scientists Discover 'Dark Oxygen' 4,000 Meters Below Sea Level

Scientists have discovered that polymetallic nodules in the Clarion-Clipperton Zone produce 'dark oxygen' 4,000 meters below the sea surface, potentially rewriting our understanding of oceanic oxygen sources and the origins of life, while complicating deep-sea mining debates due to ecological concerns.

via Yahoo|

#dark-oxygen #deep-sea-mining #environmental-impact

science1 year ago•4 min saved

Unraveling the Mystery of Dark Oxygen

A study published in Nature Geosciences reveals that metal nodules on the ocean floor release oxygen, challenging the belief that deep-sea oxygen solely originates from surface sources. These nodules, rich in metals like manganese, function like batteries, breaking down water into hydrogen and oxygen. This "dark oxygen" supports deep-sea ecosystems and raises concerns about the environmental impact of mining these nodules for rare metals. The findings prompt a reevaluation of oxygen production processes and the origins of life on Earth.

via Ynetnews|

#deep-sea #marine-ecosystems #mining-impact