The Project area is underlain by a largely unexplored and only recently recognised belt of Archaean-aged greenstone rocks that were discovered in 2005. This belt of predominantly volcanic and sedimentary rocks is located on the southern margin of the Sylvania Dome, a major structure where Archaean predominantly granitic basement rocks thought to be part of the Pilbara Craton, are exposed at surface within surrounding younger Proterozoic aged sedimentary basins.

Typically, at the Karlawinda Gold Project (KGP) the bedrock geology is obscured by a thin cover of sandy soil up to 2m thick. The Bibra deposit is part of a large-scale Archaean gold mineralising system with mineralisation hosted within a package of deformed meta-sediments and meta-volcanic rocks and is developed on four main parallel, shallow dipping structures. Close to surface in the weathered rock, oxide gold mineralisation has been developed over the structures from surface to a depth of approximately 60m.

The KGP is an operating gold project which includes the Bibra deposit and numerous outstanding exploration targets including Forfar, Muirfield and Jims West. The project covers a total area of approximately 2,052km2.

Bibra Deposit Geology
At Bibra, mineralisation is shoot-controlled along a series of dominant low-angle, north-east trending mineralised faults that combine to make up a very large-scale mineralised system. The system is hosted in a sequence of Archaean greensto ........

The Bibra deposit is mined by open pit mining methods using conventional mining equipment. The selected mining method, design and extraction sequence are tailored to suit orebody characteristics, minimise dilution and ore loss, defer waste movement, minimise rates of vertical mining advance, utilise planned process plant capacity and expedite free cash generation in a safe manner. The open pit has been scheduled based on achieved mining productivity and rates along with consistent material movements.

Currently a contractor-operated open-pit mining option is the basis for the cut-off grade. Ore and waste is paddock blasted on 5m benches and subsequently excavated as 2.5m flitches utilising a conventional excavator and truck mining fleet to facilitate moderate ore excavation selectivity.

The low-angle dip of the deposit (28° to West) allows for a designed overall wall angle on the Footwall (Eastern side of pit) between ramps of 25°. The western wall (Hanging Wall) of the pit is designed to have an overall slope of 49.8°.

The operational mine plan includes waste rock dumps, a ROM pad, a surface water diversion channel, surface dewatering bores, light and heavy vehicle workshop facilities, explosives storage and supply facilities and technical services and administration facilities.

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