The Cock-eyed Bob is hosted within the upper ‘Santa Clause’ member of the Banded Iron Formation (BIF) of the Mount Belches group. The Mount Belches group is located in the southern Eastern Goldfields Superterrane, Yilgarn Craton, Western Australia.

The iron formation is a silicate/oxide-facies unit with over printing sulphides, and has undergone metamorphism (upper-greenschist facies) and deformation (two generations of folds). The gold deposits are hosted in both the hinge zone and along the limbs of a regional scale, chevron folded BIF package.

Gold dominantly occurs as inclusions of native gold and/or electrum within or around pyrrhotite, magnetite, and arsenopyrite, and economic mineralisation is typically restricted to the BIF horizons.

The ‘Flora Dora’ deposit is hosted within the lower ‘Maxwells’ member of the Mount Belches group and the ‘Santa’ deposit is hosted within the upper ‘Santa’’ member both members are located in the southern Eastern Goldfields Superterrane, Yilgarn Craton, Western Australia.

• Gold dominantly occurs as inclusions of native gold and/or electrum within or around pyrrhotite, magnetite, and arsenopyrite, and economic mineralisation is typically restricted to the BIF horizons.

The Mount Belches mining centre is located 18km from the Randalls Mill and currently comprises the Maxwells and Cock-eyed Bob underground mines.

For Cock-eyed Bob Mechanised Longhole Open Stoping has been adopted as the primary stoping method and to minimise potential dilution, levels have been planned at 16 metre intervals. Ore strike driving will be performed with a single boom jumbo to a nominal dimension of 2.5 metres wide and 3 metres high.

Ore production at Maxwells underground commenced in October 2017, contributing 12,024 tonnes at a grade of 3.3 g/t Au for 1,271 contained ounces. Production for the quarter was sourced from ore development headings with long hole stoping activities scheduled to commence in Q3 FY17.

Santa Area - open pit mining activities completed in Q1 FY2017 with exploration drilling supporting the potential for a new underground mine.

All ore from the Mount Monger Operation is processed through the 1.3 mtpa Randalls facility, located 65 km south east of Kalgoorlie and is 15 km from the Daisy Complex.

Gold recovery consists of both a gravity circuit containing two gravity concentrators an intensive cyanidation unit and hybrid CIP circuit comprising two leach tanks and six adsorption vessels. Gold is stripped from the loaded using a pressure Zadra type elution circuit consisting of two elution columns and the gold is subsequently recovered from the cathodes of the gravity and electrowinning cells.