"According to our "soviet economy", from 8 to 20% of tin were taken out. The rest 80% are still in rocks mined out that now lay as huge useless mountains around the former MCP in the open air. There are silver, gold and many other minerals in those rocks beside tin."
This is a personal account of the mine. Lays a lot of support to the general idea that Aurus's gold is coming from ore-rich rocks basically thrown away during the Soviet era when you couldn't make money off of it.