RE: big deal?KMSir KillingMachine, aka basher unmasked.
You inquire about production overheads. That is the time when a prefeasibility and feasibility study occurs. Not yet. You wish an educated supposition and yes I will enlighten you. Nearby exists other important gold deposits in the Candamena area. Low grade open pit are the norm and the heap leach. First Majestic (former owners of the property) have had a report (you can obtain from Sedar, do some subterranean digging) with a partial evaluation prepared and it confirmed recoveries in the 80% plus for gold). Interesting.
Let us not overlook that PRR has a massive tungsten project and the former project manager from Union Carbide is on board with it again! Excess of 100 million tons grading in the .2% range were envisioned. What worth does that rock work out too?
KM, you will have to complete your journey by doing some serious net searching to discern what PRR has.
Cheers