Mystery oxygen source discovered on the sea floor – bewildering scientists
Researchers found a new oxygen source on the Pacific Ocean floor linked to polymetallic nodules. This discovery raises questions about deep-sea ecosystems and mining impacts. The nodules catalyze water molecule splitting, potentially aiding catalyst development and astrobiology.
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Researchers have discovered a mysterious source of oxygen on the sea floor in the Pacific Ocean, where sunlight is absent for photosynthesis. This oxygen production is linked to polymetallic nodules catalyzing the splitting of water molecules, although the energy source driving this process remains unknown. The findings, published in Nature Geoscience, suggest a new oxygen source beyond photosynthesis, raising questions about its implications for deep-sea ecosystems and potential impacts of deep-sea mining in the region. The researchers observed higher oxygen concentrations in the sea-floor chambers containing these nodules, indicating significant oxygen production. Further investigations revealed that the nodules may act as catalysts for the oxygen-producing reaction, with voltage measurements suggesting a potential mechanism for water molecule splitting. Understanding this process could have applications in catalyst development and may influence the search for life signatures on other planets. Researchers emphasize the importance of mapping oxygen production areas before deep-sea mining activities to prevent ecosystem collapse due to oxygen removal.
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Researchers, led by Northwestern University's Franz Geiger, found deep-sea metallic minerals can generate oxygen, challenging photosynthesis as the sole source. Polymetallic nodules act as "geobatteries," producing oxygen through electrolysis. Deep-sea mining risks disrupting this vital process.
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