Typical oil & gas lease in Elko Nevada

James_Garner1, I just got some so called privileged info. When a geologist or assayer says the parcel in question has a yield of 31%? In normal use per industrial standards , does that mean the whole parcel is concidered or valued as a 31 % yielding soil? Or some average of a few core drillings to indicate with confidence that the 40 acres if mined will produce 31% by wieght precious metal to ore removed? It’s mix is gold, silver, copper & nickle. It seems like 31% is extremely high yield? Thats might be the key why they are so interested? Otherwise in my own thinking a 31 % yield can be understandablly by being just one lucky shovel full sample that was assayed?