Yeah, what look like ancient volcano,s you can see from google earth pretty much confirms this, IMO.

In the photo below of the A-4 vein, you can see the verticle striations that represent SEVERAL different timed pulses of fluid. To me thats a great thing to see because it increases your chances for gold deposition. If it didn,t come in one pulse, it could have come in another. In our case, where the constant plate burning has been going on, its possible that every pulse is mineralized. I can,t tell this by looking at this picture, but our geos would KNOW this important info that we are not privy to at this time. IMO