The White Foil gold deposit is a quartz stockwork hosted in a gabbro. The gabbro is differentiated broadly into a quartz-rich phase in the west. This quartz gabbro unit is the most hydrothermally altered unit and contains the bulk of the gold mineralisation. The White Foil deposit is bounded to the west by hangingwall volcaniclastic rocks. To the east mineralisation becomes irregular and uneconomic in the more melanocratic phase of gabbro. Mineralisation is controlled by sheeted systems of stockwork veining, which has imparted strong alteration and sulphidation to the quartz gabbro.

White Foil is the open pit mine at the Mungari operations and utilises conventional drill and blast, load and haul methods.

1 x Hitachi EX2600, 1 x Komatsu PC1250, 1 x Komatsu PC200
6 x Caterpillar 777D, 5 x Caterpillar 785
2 x Caterpillar D10T
1 x Caterpillar 16M, 1 x Caterpillar 773D water cart
3 x Drilltech DK45 DTH (165mm, 10m bench)
4 x Sandvik Pantera 1500 TopH (wall control)

Three stage crushing: Primary Metso C140 Jaw crusher (220kW) -1250 x 940mm throat- feed size 800mm, product size p80-120mm. Secondary(1) and tertiary(1) crushers: Metso HP 4 (315kW) Product size 17mm. Product Screen: Joest inclined vibrating screen 2.44 x 7.6m. 4 x conveyor belts, Belt and static magnets as well as a rock breaker for the primary crusher.

Ball Mill with 4,500kW installed power, Mill size 5.5m(dia) x 8.74m(l), Polymet composite liners, Classification Weir Cavex 250mm (x11) Grind size p80 – 106 µm. Gravity & CIP

CIP leach circuit with 2 x 1,140m tanks and 6 x 750m adsorption tanks. Elution circuit – split AARL. 3 x Electrowinning tanks - Consep, 2 in parallel for leach circuit and 1 for gravity circuit