Jerritt Canyon is a Carlin-type gold deposit, hydrothermal in origin and usually structurally controlled.

Jerritt Canyon is hosted by silty carbonate or carbonaceous siliciclastic rocks originally deposited as shelf sedimentary rocks during the Paleozoic age. The Paleozoic host rocks have been imbricated, faulted, and folded through several orogenic events in the Paleozoic and Mesozoic. An early phase of intrusive igneous activity is represented by west-northwest mafic igneous dikes of Paleozoic age.

In general terms, the intersection of structures with favourable host rocks is the primary control and the form of mineralization ranges from apparently stratabound to fault hosted where the faults can be either highly discordant to bedding or bedding-parallel. Deposits at Jerritt Canyon are mostly stratabound or fault hosted. Gold occurs as very fine, micron sized, particles in pyrite and arsenian pyrite. Other sulfides are orpiment, realgar, and stibnite. Alteration includes decarbonatization, decalcification, and silicification (jasperoid).

Gold mineralization at Jerritt Canyon is hosted by Hanson Creek Formation units and the lower part of the Roberts Mountains Formation. The Saval discontinuity, being the contact between the Hanson Creek and the Roberts Mountain Formations, is interpreted as a primary control on gold mineralization at Jerritt Canyon. Gold mineralization is hosted by, or spatially associated, with high angle west-northwest- ........

Jerritt Canyon has been in operation since 1981, with open pit operations occurring from 1981 to 1999, and underground operations commencing in 1993 at SSX and Smith. SSX and Smith are currently contractor operated.

SSX is accessed via ramp located in the southeast portion of the underground mine at the bottom of a historical open pit, and underground workings strike northwest to southeast, spanning approximately 10,000 ft. SSX is comprised of seven mining zones, with Zone 1 in the east and Zone 7 in the west. The zones overlap in areas due to overlapping orebodies in the vertical plane. SSX is ventilated via a series of raises and through the main ramps. Mineralized material is hauled from muck bays and stockpiled near the portal, where it is then delivered to the mill via larger haul trucks. All mining voids are filled with cemented rock fill (CRF).

Smith is accessed via a ramp located at the bottom of the inactive Dash open pit. Underground workings are extensive and access eight distinct mining zones, though only six zones have been considered by SLR in the estimation of Mineral Reserves. Smith is ventilated via a series of raises and through the main ramp. Similarly to operations at SSX, mineralized material is hauled from muck bays and stockpiled near the portal, where it is then delivered to the mill via larger haul trucks. All mining voids are filled with CRF.

Stoping Methods
Production at SSX and Smith utilizes the cut and fill ........

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The processing facilities at Jerritt Canyon are designed to operate at a rate of 4,500 stpd with an operating availability of 90% and are permitted to operate at 6,000 stpd. The facilities include:
• Primary crushing?
• Ore drying;
• Secondary crushing;
• Tertiary crushing;
• Dry grinding;
• Roasting;
• Thickening;
• Carbon-in-leach (CIL);
• Carbon stripping;
• Carbon reactivation;
• Electrowinning;
• Electrowinning sludge refining;
• Oxygen plant;
• Cooling pond;
• Water evaporation pond;
• Tailings Impoundment.

Roaster
The roaster feed bucket elevator lifts the mixture of ore and pulverized coal approximately 135 ft and discharges into the roaster feed air slide. A disengaging bin receives the air slide discharge and funnels this material into the fluidized feed distributor. The roaster system is comprised of two identical, side by side roaster trains, each train is permit ........