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Drop of ancient seawater rewrites Earth's history
EurekAlert! ^ | August 1, 2019 | University of the Witwatersrand

Posted on 08/05/2019 8:20:16 AM PDT by SunkenCiv

Research reveals that plate tectonics started on Earth 600 million years before what was believed earlier...

Where it was previously thought that plate tectonics started about 2.7 billion years ago, a team of international scientists used the microscopic leftovers of a drop of water that was transported into the Earth's deep mantle - through plate tectonics - to show that this process started 600 million years before that. An article on their research that proves plate tectonics started on Earth 3.3 billion years ago was published in the high impact academic journal, Nature, on 16 July...

For their research, the team analysed a piece of rock melt, called komatiite - named after the type occurrence in the Komati river near Barberton in Mpumalanga - that are the leftovers from the hottest magma ever produced in the first quarter of Earth's existence (the Archaean). While most of the komatiites were obscured by later alteration and exposure to the atmosphere, small droplets of the molten rock were preserved in a mineral called olivine. This allowed the team to study a perfectly preserved piece of ancient lava.

"We examined a piece of melt that was 10 microns (0.01mm) in diameter, and analysed its chemical indicators such as H2O content, chlorine and deuterium/hydrogen ratio, and found that Earth's recycling process started about 600 million years earlier than originally thought," says Wilson. "We found that seawater was transported deep into the mantle and then re-emerged through volcanic plumes from the core-mantle boundary."

(Excerpt) Read more at eurekalert.org ...


TOPICS: Astronomy; Science
KEYWORDS: archaean; astronomy; barberton; catastrophism; chlorine; continentaldrift; deuterium; geology; h2o; hydrogen; komatiite; komatiites; komatiriver; louisafrank; louisfrank; magma; mantle; mpumalanga; olivine; platetectonics; science; water
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A diagrammatic representation of the Earth in the Archaean showing subducted ocean floor carrying its chemical signature into the deep mantle. The signature which includes water and chlorine is preserved in melt inclusions contained within olivine and carried back up to surface within komatiite lava flows.

Credit: Figure created by research team for news release. Wits University


Credit: Figure created by research team for news release. Wits University

1 posted on 08/05/2019 8:20:16 AM PDT by SunkenCiv
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To: 75thOVI; Abathar; agrace; aimhigh; Alice in Wonderland; AnalogReigns; AndrewC; aragorn; ...

2 posted on 08/05/2019 8:20:49 AM PDT by SunkenCiv (Imagine an imaginary menagerie manager imagining managing an imaginary menagerie.)
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http://www.freerepublic.com/tag/louisfrank/index


3 posted on 08/05/2019 8:23:40 AM PDT by SunkenCiv (Imagine an imaginary menagerie manager imagining managing an imaginary menagerie.)
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To: SunkenCiv

Back when Ruth Bader Ginsburg was a mere slip of a girl...


4 posted on 08/05/2019 8:23:46 AM PDT by Army Air Corps (Four Fried Chickens and a Coke)
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The Big Splash: A Scientific Discovery That Revolutionizes the Way We View the Origin of Life, the Water We Drink, the Death of the Dinosaurs, the Creation of the Oceans, the Nature of the Cosmos, and the Very Future of the Earth Itself
The Big Splash:
A Scientific Discovery
That Revolutionizes the Way 
We View the Origin of Life,
the Water We Drink,
the Death of the Dinosaurs,
the Creation of the Oceans,
the Nature of the Cosmos,
and the Very Future of the Earth Itself

by Louis A. Frank
and Patrick Huyghe


5 posted on 08/05/2019 8:26:05 AM PDT by SunkenCiv (Imagine an imaginary menagerie manager imagining managing an imaginary menagerie.)
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To: Army Air Corps
RBG's senior picture is on a cave wall in France. /stolen

6 posted on 08/05/2019 8:27:16 AM PDT by SunkenCiv (Imagine an imaginary menagerie manager imagining managing an imaginary menagerie.)
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To: SunkenCiv
Komati river near Barberton in Mpumalanga ............. Is that near Wakanda?😄..........
7 posted on 08/05/2019 8:28:20 AM PDT by Red Badger (Against stupidity the gods themselves contend in vain......................)
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To: SunkenCiv
The signature which includes water and chlorine is preserved in melt inclusions contained within olivine and carried back up to surface within komatiite lava flows.

Does this mean municipalities were chlorinating water supplies 3.3 billion years ago? /sarc

8 posted on 08/05/2019 8:30:52 AM PDT by immadashell (Save Innocent Lives - ban gun free zones)
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To: Red Badger
Ma-pu-ma-langa, fun to say...

9 posted on 08/05/2019 8:31:23 AM PDT by SunkenCiv (Imagine an imaginary menagerie manager imagining managing an imaginary menagerie.)
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To: Red Badger
Ma-pu-ma-langa, fun to say...
Wakanda always wanna wanna wanna...

10 posted on 08/05/2019 8:31:58 AM PDT by SunkenCiv (Imagine an imaginary menagerie manager imagining managing an imaginary menagerie.)
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To: immadashell
Yeah, and the protestors have been out there every minute since! ;^)

11 posted on 08/05/2019 8:32:38 AM PDT by SunkenCiv (Imagine an imaginary menagerie manager imagining managing an imaginary menagerie.)
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To: SunkenCiv

Means No Worries...


12 posted on 08/05/2019 8:37:40 AM PDT by bwest
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To: SunkenCiv

“...a drop of water that was transported into the Earth’s deep mantle - through plate tectonics”

Science marches on.


13 posted on 08/05/2019 8:48:59 AM PDT by D_Idaho ("For we wrestle not against flesh and blood...")
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To: SunkenCiv

Lol.. 600 million years? Man, that’s better than a comic strip.
HBiased opinions masquerading as science ping. Def not science. Next up the hymalayas will melt by 2035.. o wait.


14 posted on 08/05/2019 8:50:42 AM PDT by momincombatboots (Do you know anyone who isn’t a socialist after 65? Freedom exchanged cash, a medicare card control.)
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To: D_Idaho
Plate tectonics was a big improvement over bowl tectonics.

15 posted on 08/05/2019 8:51:16 AM PDT by SunkenCiv (Do I *really* need to put /rimshot after that?!?)
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To: momincombatboots
Your post is not as good as a comic strip.

16 posted on 08/05/2019 8:52:45 AM PDT by SunkenCiv (Imagine an imaginary menagerie manager imagining managing an imaginary menagerie.)
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To: SunkenCiv

Truth usually isn’t. Just tired of bab y food science being peddled as truth. It. Isn’t. Heck, it isn’t even science.


17 posted on 08/05/2019 8:54:46 AM PDT by momincombatboots (Do you know anyone who isn’t a socialist after 65? Freedom exchanged cash, a medicare card control.)
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To: bwest
A video collage of James Bond ordering his famous drink. -- Vodka Martini, Shaken, Not Stirred

18 posted on 08/05/2019 8:55:31 AM PDT by SunkenCiv (Imagine an imaginary menagerie manager imagining managing an imaginary menagerie.)
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To: SunkenCiv

Isn’t ALL seawater ultimately ancient, though?


19 posted on 08/05/2019 9:01:13 AM PDT by NFHale (The Second Amendment - By Any Means Necessary.)
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To: momincombatboots
Your opinion isn't truth, and you clearly know nothing about science.

20 posted on 08/05/2019 9:01:49 AM PDT by SunkenCiv (Imagine an imaginary menagerie manager imagining managing an imaginary menagerie.)
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