As far as I know, precious metal mining in Argentina is still in its infancy stage, so short term this will have hardly any positive effects for the Argentinean Treasury. However, there are many (non-producing) projects in development, which may be frustrated by this kind of obscure rule making. This rule doesn't make any sense for the PM sector.

The advantage of Golden Minerals is that is nicely diversified geographically. If development at el Quevar would have to be put on hold due to this measure, that does not change the short to midterm picture of the company very dramatically. Velardena is clearly the project that will have to carry this company forward in the near future and there are plenty of other prospects in Mexico and Peru that can be developed.