In the NAVIAL pdf they give as much attention to the iron,if not more-most of the pdf was written when iron was ca 45 and they note rise of iron prices in 2009 and of course iron is a lot more profitable now

in the dredging of alluvial deposits they would focus on gold silver I think but elsewhere either mine iron for itself- a lot of emphasis on that, and in some areas gold and silver would be a byproduct or the other way around?depending on the area and concentration

CWRN has 20-30 oz gold that goes w each ship and cwrn collects larger copper pods in 25 ton?containers

a neighboring navial concession has silver w their iron though no production yet

the whole mountain backbone of baja has been said to be a treasure trove in publications