Water in Mantle May be Associated with Subduction (More water below oceans than in?)

Oregon State University ^ | August 19, 2009 | Unknown

[ErnstStavroBlofeld]

I would not be suprised. Most of the worlds major earthquake activity is along subduction zones.

[ErnstStavroBlofeld]

There is some creedence to this.During the 1960s, Rocky Flats nuclear facility began pumping radioactive waste into wells. As soon as they started, earthquakes began. These quakes began on April 24th, 1962, which were triggered by the pumping under high pressure into a 3,670-meter deep disposal well. The first quake was 1.5 on the Richter scale. It was not known that there was a major fault in this area until later. Pumping continued for almost four years as the number of quakes increased and magnitudes reached as high as 5.0. The liquid acted like a lubricant and caused the fault lines to move.

[FReepaholic]

...What does that have to do with subduction zones? ...

There are other interpretations of the word "firmament".

[SunkenCiv]

Thanks GeronL. One underground "sea" -- under the Himalayas if memory serves -- has been known for years; last time I tried to find the file about it, I found bupkis, so there probably isn't a file on the drives, or possibly, the name is just not obvious.

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[SunkenCiv]

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[SunkenCiv]

not what I was looking for, but nonetheless...

http://www.sciencedaily.com/releases/2007/02/070210171556.htm

http://www.sciencedaily.com/images/2007/02/070210171556.jpg

One of the most dramatic features in the Wysession et. al global mantle shear-wave attenuation model is a very high-attenuation anomaly at the top of the lower mantle beneath eastern Asia. This anomaly is believed due to water that has been pumped into the lower mantle via the long history of the subduction of oceanic lithosphere — crust and upper mantle — in this region. The left figure is a slice through the earth, showing the attenuation anomalies within the mantle. The location of the slice — red line in the upper right figure — is a map of the seismic attenuation at a depth of roughly 620 miles. In both images, red shows unusually soft and weak rock, and blue shows unusually stiff rock (yellow and white show near-average values). The two figures in the lower right are resolution tests to see if the data have the resolution to retrieve Earth structure in these parts of the Earth. The sharper the black-white transitions are, the better the resolution is. (Image Credit: Eric Chou)

[djf]

Kinda hard to swallow.

I mean, it’s HOT down there - REAL HOT!

And even if subduction zones are cooler, hey, 900 degrees is cooler than 1000 degrees. But still way, way too hot for liquid water!

[SunkenCiv]

Scientists Reveal Fate Of Earth’s Oceans
Science News
http://www.sciencedaily.com/releases/2006/05/060511083341.htm

ScienceDaily (May 11, 2006) — Scientists at The University of Manchester have uncovered the first evidence of seawater deep inside the Earth shedding new light on the fate of the planet’s oceans, according to research published in Nature (May 11, 2006).

[GeronL]

I thought there was to be war for water in the future. We might, possibly someday, be able to get out of the ground?

[null and void]

One tiny quibble:

The liquid acted like a lubricant and caused enabled the fault lines to move.

[null and void]

Where did it say liquid?

[djf]

I may be wrong, as I often am.

But it talks about “water”.
Not “steam”.

[null and void]

I think just this one precious time, we can both be wrong.

Me because I missed this part:

“Most evidence suggests that subducting rocks initially hold water within their minerals, but that water is released as the rocks heat up.”

You because you forgot that under pressure the boiling point of water rises...

[patton]

Above 705 degrees F and 218 atmospheres, wierd things happen to water.

[ForGod'sSake]

One underground "sea" -- under the Himalayas if memory serves -- has been known for years; last time I tried to find the file about it, I found bupkis...

You saved it in the SAHARA FOREST folder!

[SunkenCiv]

Hard to believe this never got posted.

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[SunkenCiv]

Whoops.

[SunkenCiv]

Heh... I found it, I think. There’s a folder called “Deep Earth origin?” in the “Water Shortage” folder... six or seven files... but it’s bedtime now that I’ve teased everyone. ;’)

[SunkenCiv]

okay, okay, you’ve talked me into it...

Remains of an ancient ocean
26 August 1999
Paul Cooper
http://www.nature.com/nsu/990826/990826-8.html

Leaking Earth could run dry
Water flows into and out of the mantle
Wednesday, September 8, 1999 Published at 23:12 GMT 00:12 UK
http://news.bbc.co.uk/1/hi/sci/tech/442040.stm

Inner Earth May Hold More Water Than the Seas
By Ben Harder
for National Geographic News
March 7, 2002
http://news.nationalgeographic.com/news/2002/03/0307_0307_waterworld.html

Earth could hold more water
Five times as much water as in all the world’s oceans may lurk deep below its surface.
8 March 2002
Philip Ball
http://www.nature.com/nsu/020304/020304-10.html

[Ernest_at_the_Beach]

Now how can I sleep well tonight?

It's dry as a bone in the LA Basin and all of that water is down there?.....

Why doesn't it reveal itself?