Ann: Galena Raises $20 million and Updates Production Guidance, page-210

I doubt geophysics very much. Lots and lots of grade control drilling is the only way I see the mine geo's can direct mining with any confidence. This style of folded, faulted apron mineralisation and whatever the feeder veins throw up is impossible to define by face mapping/sampling alone. There just isn;t the geological continuity to join up whatever is in one development drive with the next one 20m higher without grade control drilling in-between to help guide development design the stopes imo. And lots of it...