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ghost2509 · 2nd October 2022, 10:16

The study confirmed something that it was only a theory, namely that ocean water accompanies subducting slabs and thus enters the transition zone.

NDTV.com
Anjali Thakur
October 02, 2022

Scientists have discovered a reservoir of water three times the volume of all the oceans beneath the Earth's surface, according to an international study. The water has been found between the transition zone of the Earth's upper and lower mantle. The research team analyzed a rate diamond formed 660 meters below the Earth's surface using techniques including Raman spectroscopy and FTIR spectrometry, ANI reported.

The study confirmed something that for a long time it was just a theory, namely that ocean water accompanies subducting slabs and thus enters the transition zone. This means that our planet's water cycle includes the Earth's interior.

"These mineral transformations greatly hinder the movements of rock in the mantle," explains Prof. Frank Brenker from the Institute for Geosciences at Goethe University in Frankfurt. For example, mantle plumes -- rising columns of hot rock from the deep mantle -- sometimes stop directly below the transition zone. The movement of mass in the opposite direction also comes to standstill.

Brenker says, "Subducting plates often have difficulty in breaking through the entire transition zone. So there is a whole graveyard of such plates in this zone underneath Europe."

However, until now it was not known what the long-term effects of "sucking" material into the transition zone were on its geochemical composition and whether larger quantities of water existed there. Brenker explains: "The subducting slabs also carry deep-sea sediments piggyback into the Earth's interior. These sediments can hold large quantities of water and CO2. But until now it was unclear just how much enters the transition zone in the form of more stable, hydrous minerals and carbonates -- and it was therefore also unclear whether large quantities of water really are stored there."

The prevailing conditions would certainly be conducive to that. The dense minerals wadsleyite and ringwoodite can (unlike the olivine at lesser depths) store large quantities of water- in fact so large that the transition zone would theoretically be able to absorb six times the amount of water in our oceans. "So we knew that the boundary layer has an enormous capacity for storing water," Brenker says. "However, we didn't know whether it actually did so."

An international study in which the Frankfurt geoscientist was involved has now supplied the answer. The research team analysed a diamond from Botswana, Africa. It was formed at a depth of 660 kilometres, right at the interface between the transition zone and the lower mantle, where ringwoodite is the prevailing mineral. Diamonds from this region are very rare, even among the rare diamonds of super-deep origin, which account for only one per cent of diamonds. The analyses revealed that the stone contains numerous ringwoodite inclusions -- which exhibit a high water content. Furthermore, the research group was able to determine the chemical composition of the stone. It was almost exactly the same as that of virtually every fragment of mantle rock found in basalts anywhere in the world. This showed that the diamond definitely came from a normal piece of the Earth's mantle. "In this study, we have demonstrated that the transition zone is not a dry sponge, but holds considerable quantities of water," Brenker says, adding: "This also brings us one step closer to Jules Verne's idea of an ocean inside the Earth." The difference is that there is no ocean down there, but hydrous rock which, according to Brenker, would neither feel wet nor drip water.

maxhitman · 2nd October 2022, 22:42

Super Interesting !

Thanks Ghost !

Will they find Dinosaurs living in a cavern under the Earth next?
Hey, maybe Jules Verne (the sci-fi writer) knew stuff we don´t know.
Afterall,
he wrote that cool book , "Journey to the center of the Earth"... in 1864 !
I think that Jules guy was a time traveler.

xlr8tx · 2nd October 2022, 23:01

I've read many articles on this over the years. Here are two from over 8 years ago:

(This New Scientist article even has the same opening sentence as the article posted.)

Code:

http://newscientist.com/article/dn25723-massive-ocean-discovered-towards-earths-core/

Code:

http://futurism.com/scientists-discover-massive-ocean-near-earths-core3657686

After doing a quick Google search it seems that the story has belatedly gained traction in Indosphere media in the past few days.

2nd October 2022, 10:16	#1
ghost2509 V.I.P. Postaholic Join Date: Sep 2010 Posts: 7,802 Thanks: 21,646 Thanked 23,693 Times in 6,116 Posts	Scientists Discover Massive "Ocean" Near Earth's Core The study confirmed something that it was only a theory, namely that ocean water accompanies subducting slabs and thus enters the transition zone. NDTV.com Anjali Thakur October 02, 2022 Scientists have discovered a reservoir of water three times the volume of all the oceans beneath the Earth's surface, according to an international study. The water has been found between the transition zone of the Earth's upper and lower mantle. The research team analyzed a rate diamond formed 660 meters below the Earth's surface using techniques including Raman spectroscopy and FTIR spectrometry, ANI reported. The study confirmed something that for a long time it was just a theory, namely that ocean water accompanies subducting slabs and thus enters the transition zone. This means that our planet's water cycle includes the Earth's interior. "These mineral transformations greatly hinder the movements of rock in the mantle," explains Prof. Frank Brenker from the Institute for Geosciences at Goethe University in Frankfurt. For example, mantle plumes -- rising columns of hot rock from the deep mantle -- sometimes stop directly below the transition zone. The movement of mass in the opposite direction also comes to standstill. Brenker says, "Subducting plates often have difficulty in breaking through the entire transition zone. So there is a whole graveyard of such plates in this zone underneath Europe." However, until now it was not known what the long-term effects of "sucking" material into the transition zone were on its geochemical composition and whether larger quantities of water existed there. Brenker explains: "The subducting slabs also carry deep-sea sediments piggyback into the Earth's interior. These sediments can hold large quantities of water and CO2. But until now it was unclear just how much enters the transition zone in the form of more stable, hydrous minerals and carbonates -- and it was therefore also unclear whether large quantities of water really are stored there." The prevailing conditions would certainly be conducive to that. The dense minerals wadsleyite and ringwoodite can (unlike the olivine at lesser depths) store large quantities of water- in fact so large that the transition zone would theoretically be able to absorb six times the amount of water in our oceans. "So we knew that the boundary layer has an enormous capacity for storing water," Brenker says. "However, we didn't know whether it actually did so." An international study in which the Frankfurt geoscientist was involved has now supplied the answer. The research team analysed a diamond from Botswana, Africa. It was formed at a depth of 660 kilometres, right at the interface between the transition zone and the lower mantle, where ringwoodite is the prevailing mineral. Diamonds from this region are very rare, even among the rare diamonds of super-deep origin, which account for only one per cent of diamonds. The analyses revealed that the stone contains numerous ringwoodite inclusions -- which exhibit a high water content. Furthermore, the research group was able to determine the chemical composition of the stone. It was almost exactly the same as that of virtually every fragment of mantle rock found in basalts anywhere in the world. This showed that the diamond definitely came from a normal piece of the Earth's mantle. "In this study, we have demonstrated that the transition zone is not a dry sponge, but holds considerable quantities of water," Brenker says, adding: "This also brings us one step closer to Jules Verne's idea of an ocean inside the Earth." The difference is that there is no ocean down there, but hydrous rock which, according to Brenker, would neither feel wet nor drip water.

2nd October 2022, 22:42	#2
maxhitman V.I.P. Clinically Insane Join Date: Apr 2017 Location: Gilligan's Island Posts: 4,795 Thanks: 15,129 Thanked 21,945 Times in 4,460 Posts	Super Interesting ! Thanks Ghost ! Will they find Dinosaurs living in a cavern under the Earth next? Hey, maybe Jules Verne (the sci-fi writer) knew stuff we don´t know. Afterall, he wrote that cool book , "Journey to the center of the Earth"... in 1864 ! I think that Jules guy was a time traveler. __________________ Last edited by maxhitman; 2nd October 2022 at 22:42. Reason: fix spelling

2nd October 2022, 23:01	#3
xlr8tx Kill Your god. Forum Lord Join Date: May 2014 Location: Stateless, Stranger in a Strange Land Posts: 1,493 Thanks: 169,193 Thanked 4,226 Times in 1,202 Posts	I've read many articles on this over the years. Here are two from over 8 years ago: (This New Scientist article even has the same opening sentence as the article posted.) Code: http://newscientist.com/article/dn25723-massive-ocean-discovered-towards-earths-core/ Code: http://futurism.com/scientists-discover-massive-ocean-near-earths-core3657686 After doing a quick Google search it seems that the story has belatedly gained traction in Indosphere media in the past few days.