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Rare Diamond Reveals Earth's Interior is All Wet

 
Anonymous Coward
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03/13/2014 10:06 AM
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Rare Diamond Reveals Earth's Interior is All Wet
Ride on a rocket

A violent volcanic eruption called a kimberlite quickly carried this particular diamond from deep in the mantle. "The eruption of a kimberlite is analogous to dropping a Mentos mint into a bottle of soda," Pearson said. "It's a very energetic, gas-charged reaction that blasts its way to Earth's surface."

The tiny, green crystal, scarred from its 325-mile (525 km) trip to the surface, was bought from diamond miners in Juína, Brazil. The mine's ultradeep diamonds are misshapen and beaten up by their long journey. "They literally look like they've been to hell and back," Pearson said. The diamonds are usually discarded because they carry no commercial value, he said, but for geoscientists, the gems provide a rare peek into Earth's innards. [Shine On: Photos of Dazzling Mineral Specimens]

The ringwoodite discovery was accidental, as Pearson and his co-authors were actually searching for a means of dating the diamonds. The researchers think careful sample preparation is the key to finding more ringwoodite, because heating ultradeep diamonds, as happens when scientists polish crystals for analysis, causes the olivine to change shape.

[link to news.yahoo.com]
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03/13/2014 10:07 AM
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Re: Rare Diamond Reveals Earth's Interior is All Wet
neocide

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03/20/2014 09:31 AM
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Re: Rare Diamond Reveals Earth's Interior is All Wet
A microscopic crystal of a mineral never before seen in a terrestrial rock holds clues to the presence of vast quantities of water deep in Earth’s mantle, scientists report in a paper published today in Nature1. The discovery came from a diamond weighing less than one-tenth of a gram, found in Brazil. Further studies of the sample could help to answer the long-standing question of the origin of the planet's water.


Most diamonds form at depths of about 150 to 200 kilometres, but 'ultradeep' diamonds come from a region of the mantle known as the transition zone, 410 to 660 kilometres below the surface, says Graham Pearson, a mantle geochemist at the University of Alberta in Edmonton and the lead author of the study.

Impurities in ultradeep diamonds can be used as probes to study the regions in which the stones formed — and in particular to understand what minerals are present at those depths. Certain minerals have crystal structures that can form only at high pressures or temperatures, or both, and many rearrange themselves into different structures when the pressure is taken off or the temperature goes down. Thus, when the churning of the mantle brings rock towards the surface, some of the minerals that formed at great depths can no longer be found. But if the minerals are trapped inside diamonds, they stay compressed in their original forms. “These high-pressure diamonds give you a window into the deep Earth,” says Pearson.


He and his team studied one such diamond, which weighed 0.09 grams and came from the Juína district in Brazil. As they examined impurities in it using a light-scattering method known as Raman spectroscopy, they came across something unusual: a grain 40 micrometres across that turned out to be ringwoodite — a high-pressure form of olivine, a mineral that makes up much of the upper mantle. Ringwoodite had previously been found only in meteorites or synthesized in the lab.

[link to www.nature.com]
If you are born once, you die twice. If you are born twice, you die once.
:neocide2:
If you are born twice, you die once. If you are born once, you die twice.
neocide

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03/20/2014 09:33 AM
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Re: Rare Diamond Reveals Earth's Interior is All Wet
Noah’s Flood - Where did the water come from?

In telling us about the world-changing Flood in the days of Noah, the Bible gives us much information about where the waters came from and where they went. The sources of the water are given in Genesis 7:11 as “the fountains of the great deep” and the “windows of heaven.”

The Fountains of the Great Deep

The “fountains of the great deep” are mentioned before the “windows of heaven,” indicating either relative importance or the order of events.

What are the “fountains of the great deep?” This phrase is used only in Genesis 7:11. “Fountains of the deep” is used in Genesis 8:2, where it clearly refers to the same thing, and Proverbs 8:28, where the precise meaning is not clear.

“The great deep” is used three other times: Isaiah 51:10, where it clearly refers to the ocean; Amos 7:4, where God’s fire of judgement is said to dry up the great deep, probably the oceans; and Psalm 36:6 where it is used metaphorically of the depth of God’s justice/judgement. “The deep” is used more often, and usually refers to the oceans (e.g., Genesis 1:2; Job 38:30, 41:32; Psalm 42:7, 104:6; Isaiah 51:10, 63:13; Ezekiel 26:19; Jonah 2:3), but sometimes to subterranean sources of water (Ezekiel 31:4, 15). The Hebrew word (mayan) translated “fountains” means “fountain, spring, well.”


[link to www.answersingenesis.org]
If you are born once, you die twice. If you are born twice, you die once.
:neocide2:
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neocide

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03/20/2014 09:35 AM
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Re: Rare Diamond Reveals Earth's Interior is All Wet
Lastly I have to comment on how this makes me wonder if such findings will revive the idea/theory of an "inner earth."

I know someone on here has to be interested in such things.


bump
If you are born once, you die twice. If you are born twice, you die once.
:neocide2:
If you are born twice, you die once. If you are born once, you die twice.





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