One of the key differences between Aussie and Canadian U/G gold mining is the need to operate for months in temperatures down to -30C in Canada. Every building needs to be winterized (insulated/heated) and if your workings generate groundwater you must heat the mine air to about 3C. This can result in burning $M's in propane every winter. Block cave at Red Chris will be interesting for instance.
Yes I have a few AU,CU TSX investments and "dateline" DTR very low valuation ...low P/Es for the producers ..will have their day in the sun if Au Cu can go much higher the investment case will force buyers to get very GREEDY