As soon as I saw that story, my thoughts were, they are all or mostly foreign owned miners. So the “natives” hamper them, hopefully they lose money and pull out or sell the land cheaply and pull out, then the natives change the rules back to “anything goes” and THEY make the money, rather than let foreigners take the gold and sell it.
So I googled Mining Companies in Argentina. 144 of them. A few are domestic. Its an interesting list. with web sites.
http://www.rojasyasociados.com/en/empresas-mineras-activas-en-argentina/