Wish I'd the time...
..to speculate, much less digest your entire post(s). There's a drill hole aimed towards a target I generated pulling core out of the ground as we speak, I've got to give the prez of the company a presentation tommorrow, what the hell am I doing here?
The role of electrictiy in the deposition of metals in veins systems is something I'm going to consider, but I'm not going to give up on P-T-pH-etc models. But muse on it I will. Might even do a literature search. If I find anything, I'll let you know. But right now I've got targets to model and core to log.
Welcome to the "HZ Ward", by the way.