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Author Topic: Need an expert identification....  (Read 8946 times)

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Offline diamond jim

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Re: Need an expert identification....
« Reply #20 on: December 29, 2014, 03:43:00 PM »
Great info...many thanks for posting. Can't believe the size of the megaliths in that rock...awesome.

Offline NS Gold Seeker

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Re: Need an expert identification....
« Reply #21 on: December 29, 2014, 03:49:52 PM »
Big friggin Xenocrysts. Must have been 10 ft. across.
Ultra mafic mantle rocks in the area, normally volcanic tuffs don't host diamonds,
but cut by lamprophyre dykes, the pictures are there and the exploration is real.  
Hope you can relate your rocks to this area.  My sense is that there is a heat source and the dykes cut
through the diamondiferous mantle material, picking up pieces of the mantle as phenocrysts and
xenocrysts and transporting them into the tuff.  Metamorphism of the whole group later.
Anyway, diamonds with no kimberlites. Wild
Gold is good.