Gold deposits at Sissingué are orogenic, greenstone hosted.

The Sissingué Gold Mine main pit mineralisation is structurally controlled and mainly hosted within a granitic stock associated with a network of quartz-carbonate veins and veinlets with associated pyrite and arsenopyrite dissemination. Gold-bearing veins have a dominant NNW to NS trend and are steeply dipping. Disseminated mineralisation is also located in the alternation envelops of the mineralised quartz veins.

Additional mineralisation is seen within interconnecting mineralised felsic dyke complexes that propagate from the main granite stock. These mineralised felsic dyke complexes, also trending NNW, host the mineralisation for the additional pits in the area, namely Binkadi, Bagoé, Western Arm and Boribana.

The Sissingué Deposit occurs in a strongly deformed Birimian greenstone belt intruded by quartz-feldspar felsic dykes and granitoid bodies. Gold mineralisation at Sissingué is associated with the felsic dykes and small granitoid (tonalite) bodies that cross-cut sedimentary rocks. Subsequent hydrothermal activities and metasomatism of the granitoids has led to a sericite-carbonate alteration within the intrusive and the more permeable horizons (sandstones and conglomerates) of the sedimentary rocks, and a low to moderate grade disseminated gold mineralisation. Late-stage high grade Au-As-quartz-carbonate veins exploited the altered and brittle portions of the intrusive and s ........

The chosen method for the Open Pit Ore Reserves is conventional open pit mining utilising hydraulic excavators and trucks, mining bench heights of 5 metres with 2.5 metre flitches to minimise ore loss and waste rock dilution.

Overall pit slopes are 30 to 50 degrees inclusive of berms spaced at between 5, 10 and 20 metres vertically and berm widths of 4 to 7 metres.

Pit ramps have been designed for a 40 tonne ADT truck fleet and are set at 16 metres (dual lane) to 10 metres (single lane).

Minimum mining width of 40 m was generally applied to the pit cutback designs.

Ore from Fimbiasso pits will be trucked to Sissingué with a maximum limit of 40 kt/month and from Bagoé pits will be trucked at a maximum limit of 50 kt/month.

The sources of ore to be processed at Sissingué are SGM, Fimbiasso and Bagoé deposits. Each deposit consists of multiple pits and the ore feed will be supplemented with stockpiles at SGM. Ore from Fimbiasso and Bagoé will be stockpiled temporarily on site then transported to Sissingué for process plant feed as per milling schedule. Waste material will be taken to the waste dump located near the pits.

Gold production in FY23 will mainly be derived from ore sourced from Fimbiasso deposit, oxide ore from SGM satellite deposits and existing stockpiles at SGM. Meanwhile, the pre-strip in the SGM main pit will be undertaken to access the ore zone. Pre-stripping at SGM main pit is expected to take 1 ........

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Ore from Sissingué mine will be processed together with ore from Fimbiasso and Bagoé pits based on blending strategy.

Average annual processing throughput rate of ore is nominally 1.2Mtpa of combined ore from all deposits, with throughput rates variable by material type. The processing circuit involves single stage crushing, semi-autogenous grinding, gravity recovery and CIL.

The process metallurgical recovery for gold is fixed by material type in each deposit. Gold recovery rates range from 94% for oxide ore to 91% for fresh ore. Recovery variation is a function of differing metallurgical properties of different material type of ores from each deposit.

Process equipment:

Gravity Circuit
* Knelson Concentrator/Gekko ILR/Dedicated EW Cell.

Thickening
* 15.0m High Rate Autotec.

ADR
* CIL: 1 x Pre-leach, 6 x CIL Tanks.
* Equipment: 7 x 1,041m3 Tanks, Residence Time 20hrs Oxide, 38hrs Fresh.
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