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Posted by George on June 21, 2006, 11:10 am
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> George wrote:
>> That diamonds form in mantle-derived host
>> rocks is not disputed.
>> http://sajg.geoscienceworld.org/cgi/content/abstract/107/1-2/91
>>
> Nitrogen is present in over 98% of diamonds:
> http://rruff.geo.arizona.edu/doclib/am/vol70/AM70_344.pdf
> Perhaps, atmospheric nitrogen (N2 or NH3) served as the
> initial medium-host for the formation of diamonds.
So what? All that indicates it the possibility that "some diamonds may be
products of recycled subduction carbon", which undoubtedly contained
atmospheric nitrogen. That provides no evidence whatsoever that the earth
was ever a gas giant planet like jupiter or Neptune.
> The diamonds continued to grow after they fell on the
> primitive surfaces of cratons, thus acquiring the
> mantle-derived inclusions.
???
> http://www.abc.net.au/science/news/stories/s57438.htm
> John Curtis
And this has what to do with the formation of diamonds within the earth?
George
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