Agree 100% mate. Presume you mean grain of salt re the rock chip samples.
The grin is usually on the face of the sampler...and yes if I had one of those XRF machines I would point it at the green copper minerals which should have at least 25% copper in them from what my geo mates tell me.
The XRF zaps a very small area ...about a five cent piece I'm told
Sceptical of an XRF analysis of cobalt, but if you point it to the copper you should get copper
Saw Burgo on the television today. Will he and the water bottle rise once again from the ashes of the "copper discovery of the decade"
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