The map I posted is the claims that belong to Bravada Gold Corp.They are just the neighbor company beside PCFGs subsidiary Nevada Rae Gold.Heres PCFG website about the Black Rock Canyon Mud Springs Gulch and Tub Springs Gulch
The property consists of alluvial/placer gold deposits within three main drainages; Black Rock Canyon, Mud Springs Gulch and Tub Springs Gulch. These deposits are typically 100 to 300 feet wide and can reach depths of up to 90 feet. The drainages flow in an easterly direction and the thickness of gravel is shown to become progressively greater to the east, where the alluvial/sedimentary material was identified as being in excess of 500 feet thick at the mill site.
Coarse gold (+60 mesh), is thought to originate from quartz veins developed locally within and on the periphery of the granodiorite stock, which forms part of Granite Mountain. The coarse gold is only known to occur in the uppermost sections of the drainages.