MAXWELLS The Maxwells deposit is hosted within the lower ‘Maxwells’ member. 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, which 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 Maxwells resource extent consists of 2020m strike; 440m across strike; and 790m down dip and open at depth. COCK-EYED BOB 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 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 ........

Mining at Mount Belches will be suspended in FY23, with the hiatus in mining to allow Silver Lake to preserve the value of the Maxwells and CEB Mineral Resources and Ore Reserves and complete infill and extensional drilling beyond Mineral Resource limits in anticipation of a return to more normalised operating and supply chain conditions in Western Australia.

MAXWELLS
Longhole open stoping was selected as the mining method for Maxwells. Diluted stopes shapes above the cutoff grade were created. Stopes were then excluded from the Reserve by the following criteria:
-Stopes above the 1219mRL
-Isolated stopes which could not support access development
-Stopes which intersected the open pit or part of crown pillar.

Decline and level development was designed to ensure each stope could be accessed. Maxwells is a vertical narrow orebody. Longhole stoping is a standard mining method for vertical narrow orebodies.

Assumptions regarding geotechnical parameters are based on design parameters recommended by an external consultant. A hydraulic radius of 9 was determined to be a stable stope span (40mH x 43mL). The assumptions used to determine the minable shapes was a minimum ore width of 1m wide plus the dilution on each wall of 0.5m. A 16mH x 10mL stope dimension was also applied to determine the mineable shapes above the cut-off grade.

Mining recovery factor of 85% was applied to account for ore loss in pillars and unplanne ........

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