Privileged planet: seafloor oxygen production (Introduction)
From mineral and element reactions:
https://www.sciencealert.com/mysterious-dark-oxygen-discovered-at-bottom-of-ocean-stuns...
"Chugging quietly away in the dark depths of Earth's ocean floors, a spontaneous chemical reaction is unobtrusively creating oxygen, all without the involvement of life.
"This unexpected discovery upends the long-standing consensus that it takes photosynthesizing organisms to produce the oxygen we need to breathe.
***
"The discovery of oxygen production by a non-photosynthetic process requires us to rethink how the evolution of complex life on the planet might have originated," says SAMS marine scientist Nicholas Owens, who wasn't involved in the research.
***
"In the midst of the Pacific Ocean, black, rounded rocks pepper the floor. Here, at depths of more than 4,000 meters (13,000 feet), oxygen levels slowly but surely keep increasing, the scientists' measurements showed.
***
"To investigate the mystery, the researchers collected some of the nodule rocks, to see if they were the source of this 'dark oxygen' production in the lab.
"Scatterings of these nodules carpet vast areas of the ocean's bottom. They're natural deposits of rare-earth metals like cobalt, manganese, and nickel, all jumbled up in a polymetallic mix.
"We value these exact metals for their use in batteries, and it turns out that's exactly how the rocks may be spontaneously acting on the ocean floor.
"'The researchers found single polymetallic nodules produced voltages of up to 0.95 V. So when clustered together, like batteries in a series, they can easily reach the 1.5 V required to split oxygen from water in an electrolysis reaction.
"It appears that we discovered a natural 'geobattery,'" says Northwestern University chemist Franz Geiger. "These geobatteries are the basis for a possible explanation of the ocean's dark oxygen production."
"'It appears that we discovered a natural 'geobattery,'" says Northwestern University chemist Franz Geiger. "These geobatteries are the basis for a possible explanation of the ocean's dark oxygen production."
While there's still much to investigate, such as the scale of oxygen production by the polymetallic nodules, this discovery offers a possible explanation for the mysterious stubborn persistence of ocean 'dead zones' decades after deep sea mining has ceased.
"'In 2016 and 2017, marine biologists visited sites that were mined in the 1980s and found not even bacteria had recovered in mined areas. In unmined regions, however, marine life flourished," explains Geiger.
"'Why such 'dead zones' persist for decades is still unknown. However, this puts a major asterisk onto strategies for sea-floor mining as ocean-floor faunal diversity in nodule-rich areas is higher than in the most diverse tropical rainforests."
"As well as these massive implications for deep-sea mining, 'dark oxygen' also sparks a cascade of new questions around the origins of oxygen-breathing life on Earth.
"Ancient microbial cyanobacteria have long been credited for first supplying the oxygen required for the evolution of complex life billions of years ago, as a waste product of photosynthesis turning sunlight into their energy source.
"'We now know that there is oxygen produced in the deep sea, where there is no light," says Sweetman.
"'I think we, therefore, need to revisit questions like: Where could aerobic life have begun?'"
Comment: this teaches us to be careful in deep-sea mining. An important discovery, but photosynthesis is still the major source of oxygen. It is an interesting addition to origin of life studies.
Complete thread:
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2024-06-12, 17:56
- Privileged Planet: the effect of interstellar clouds -
David Turell,
2024-06-11, 20:34
- Privileged Planet: earliest water -
David Turell,
2024-06-03, 18:09
- Privileged Planet: plate tectonics driving evolution -
David Turell,
2024-05-31, 18:19
- Privileged Planet: very early water -
David Turell,
2024-05-14, 14:43
- Privileged Planet: oldest Antarctic ice studied -
David Turell,
2024-04-26, 15:30
- Privileged Planet: worms' contribution to soils -
David Turell,
2024-03-11, 22:36
- Privileged Planet: wandering CO2 levels -
David Turell,
2024-03-11, 21:07
- Privileged Planet: how quantum effects of CO2 warm us -
David Turell,
2024-02-15, 16:55
- Privileged Planet: a reminder of the moon's contribution -
David Turell,
2024-02-08, 19:38
- Privileged Planet: another review -
David Turell,
2024-02-03, 04:12
- Privileged Planet: enough oxygen -
David Turell,
2024-01-18, 20:02
- Privileged Planet: core movements -
David Turell,
2024-01-07, 16:19
- Privileged Planet: deep plate studies -
David Turell,
2023-10-29, 18:59
- Privileged Planet: our rocks are different -
David Turell,
2023-10-19, 17:12
- Privileged Planet: how plants changed it -
David Turell,
2023-09-13, 17:12
- Privileged Planet: hot period forty million years ago -
David Turell,
2023-09-03, 17:06
- Privileged Planet: life before plate tectonics -
David Turell,
2023-06-17, 15:22
- Privileged Planet: became a watery planet quickly -
David Turell,
2023-06-14, 17:40
- Privileged Planet: shorter days in the past -
David Turell,
2023-06-12, 20:33
- Privileged Planet: the role of iron rich rocks -
David Turell,
2023-06-11, 19:05
- Privileged Planet: contribution of amazing ancient moss -
David Turell,
2023-05-09, 23:17
- Privileged Planet: how our planet cleans itself -
David Turell,
2023-04-08, 02:58
- Privileged Planet: plate tectonics add water -
David Turell,
2023-04-01, 16:55
- Privileged Planet: Inner inner core -
David Turell,
2023-02-22, 15:23
- Privileged Planet: Internal temperature extremely hot -
David Turell,
2023-02-18, 19:25
- Privileged Planet: great oxidation event came earlier -
David Turell,
2023-02-12, 16:34
- Privileged Planet: moon causes magnetosphere tides -
David Turell,
2023-02-06, 17:19
- Privileged Planet: outer solar system supplied our water -
David Turell,
2023-02-04, 16:15
- Privileged Planet: life makes soil from rock -
David Turell,
2023-02-02, 16:06
- Privileged Planet: source of volatile elements -
David Turell,
2023-01-29, 19:43
- Privileged Planet: fairly constant temperature range -
David Turell,
2023-01-28, 17:05
- Privileged Planet: inner core rotation? -
David Turell,
2023-01-23, 18:30
- Privileged Planet: life transformed early Earth -
David Turell,
2023-01-16, 18:22
- Privileged Planet: much of our water present at start -
David Turell,
2022-12-17, 15:14
- Privileged Planet: nitrogen cycle -
David Turell,
2022-09-20, 17:53
- Privileged Planet: how continents were formed -
David Turell,
2022-09-20, 16:09
- Privileged Planet: how continents were formed -
David Turell,
2022-08-12, 18:54
- Privileged Planet: red giant contributions -
David Turell,
2019-12-10, 18:48
- Privileged Planet: continental drift -
David Turell,
2019-02-18, 15:22
- Privileged Planet: another summary of evidence -
dhw,
2018-12-23, 09:36
- Privileged Planet: another summary of evidence -
David Turell,
2018-12-22, 19:29
- Privileged Planet: our sun is different than most stars -
David Turell,
2018-08-09, 00:32
- Privileged Planet: must have water -
David Turell,
2017-07-31, 18:29
- Privileged Planet: complete eclipses -
David Turell,
2017-06-27, 15:00
- Privileged Planet:Third book -
David Turell,
2014-03-14, 14:45
- Privileged Planet:Third book -
David Turell,
2014-03-07, 18:10
- Privileged Planet: Sunburn protection -
David Turell,
2014-03-07, 01:38
- Privileged Planet: New study -
Balance_Maintained,
2013-05-12, 06:08
- Privileged Planet: New study -
David Turell,
2013-05-11, 15:59
- Privileged Planet: New study -
xeno6696,
2012-05-01, 17:16
- Privileged Planet: New study -
dhw,
2012-05-01, 16:53
- Privileged Planet: Geologic carbon cycle -
David Turell,
2014-03-20, 16:56
- Privileged Planet: Lots of water -
David Turell,
2014-06-14, 14:45
- Privileged Planet: Dangerous Electrons blocked - David Turell, 2014-11-27, 14:48
- Privileged Planet: Lots of water -
David Turell,
2014-12-11, 15:09
- Privileged Planet: Self-made water? -
David Turell,
2014-12-17, 15:48
- Privileged Planet: Mineral evolution -
David Turell,
2015-02-21, 14:37
- Privileged Planet: hard to fnd one like us -
David Turell,
2015-06-01, 04:14
- Privileged Planet: formation of continents -
David Turell,
2015-06-27, 18:19
- Privileged Planet: particle protection -
David Turell,
2017-02-16, 21:22
- Privileged Planet: ocean microbe controls - David Turell, 2019-08-08, 00:06
- Privileged Planet: particle protection -
David Turell,
2017-02-16, 21:22
- Privileged Planet: formation of continents -
David Turell,
2015-06-27, 18:19
- Privileged Planet: hard to fnd one like us -
David Turell,
2015-06-01, 04:14
- Privileged Planet: Mineral evolution -
David Turell,
2015-02-21, 14:37
- Privileged Planet: Self-made water? -
David Turell,
2014-12-17, 15:48
- Privileged Planet: Lots of water - David Turell, 2021-03-10, 14:25
- Privileged Planet: carbon cycle under ice sheets -
David Turell,
2019-08-17, 14:50
- Privileged Planet: a brief summary of why it is -
David Turell,
2019-10-23, 21:58
- Privileged Planet: life's metabolism before oxygen -
David Turell,
2019-11-07, 18:19
- Privileged Planet: snowball Earth had a source of oxygen: - David Turell, 2019-12-04, 05:38
- Privileged Planet: life's metabolism before oxygen -
David Turell,
2019-11-07, 18:19
- Privileged Planet: a brief summary of why it is -
David Turell,
2019-10-23, 21:58
- Privileged Planet: Lots of water -
David Turell,
2014-06-14, 14:45
- Privileged Planet: New study -
dhw,
2012-04-26, 14:12