The source of the PGMs at Serra Leste was also in debate in that scholarly article that has been posted.
"The source(s) of precious metals are as yet unknown. One can speculate that Au, Pd and Pt could have been scavenged from maficultramafic rocks of the Rio Novo Sequence and/or from Luanga-type layered mafic-ultramafic intrusions."
The deposit there I think has a hydrothermally mineralised breccia stock work beneath a very highly mineralised sediment.
As we know over at IPT stock work mineralisation can be highly variable in grade. You really need to find the main deposit.
In general, as you say PGM's, are normally related to more basic rocks and commonly have Ni-Cu- Co-Cr -Mn.
I've got to go and coach my kids basketball team now as well but good if you can get on board the discussion. Esh
The source of the PGMs at Serra Leste was also in debate in that...
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