GeologyRocksThe mantle carbon cycle and super deep diamonds....
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John
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I thought I knew a fair bit
Tue, 02/26/2013 - 00:56I thought I knew a fair bit about diamonds, but I couldn't answer those questions. I'm sure I'd have a reference somewhere in a book, or maybe Google it.
John
“Civilisation exists by geological consent, subject to change without notice.” - Will Durant
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The mantle carbon cycle and super deep diamonds....
Submitted by allen98 on Sun, 02/24/2013 - 16:56.Hi everyone, any thoughts/assistance greatly required!
Diamonds are typically excavated from depths of less than 200km.
However, some places such as Juina, Brazil, have super diamonds with inclusions that suggest depths of formation of around 700 km and therefore tells us that the carbon cycle extends deeper than originally thought, so..here are my questions..
1) how do we know this isnt just a local process - surely other places with characteristics like Juina should be drilled for super deep diamonds?
2) Where else in the world would have characteristics to Juina?
3) What is the importance of knowing the true depth of the carbon cycle ? yup it shows the true depth of subduction but what else is it useful for? origin of melts? melt relationships?
Any thoughts greatly appreciated...really struggling with this one and trying to resolve it!
Thank you!