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Windarra Nickel Project <br />(100% owned) <br />1985186 1989185 <br />Ore treated (tonnes) 556,500 370.500 <br />Head grade (%mckeQ 1.60 1.78 <br />Concentrate <br />produced (tonnes) 65,670 48,790 <br />Concentrate <br />grade (% nickel) 10.6 I I.0 <br />Nickelremvery (%) 78.7 81.3 <br />Nickel in <br />concentrate (tonnes) 6,990 5,360 <br />Mine Development <br />Total development (or the year, including <br />raise drilling, was 4,370 metres (4,240 <br />metres). <br />At Mt Windarra ore production from sub- <br />level caving operations continued <br />satisfactorily during the year, accounting for <br />92% of production. <br />In preparation for the development of a <br />three metre diameter ventilation raise, <br />drilling of a 450 metre deep pilot hole was <br />completed and 116 metres of back reaming <br />was completed at year end. <br />Production from the South Windarra open <br />cut was suspended late in the year due to <br />adverse economics resulting from low nickel <br />prices. <br />Concen[ra[or <br />The concentrator operated effiaently, the <br />increased tonnage being due to productOn <br />tram South Windarra. <br />Whilst there was an improvement in <br />recovery of nickel from Mt Windarra ore <br />due to a re-design of the flotation circuit, the <br />overall recovery was lower due to <br />treatment o(lower grade ore from the <br />South Windarra open cut. <br />Ore Reserves <br />Proved and probable reserves at Mt <br />Windarra and South Windarra were <br />estimated as follows: <br />)une 1986 tune 1985 <br />Mt Windarra <br />(recoverable ore) <br />Tonnes (mdLon) 5.0 55 <br />Grade (% nickel) 1.6 1.7 <br />South Windarra <br />(in situ ore) <br />Tonnes (million) Z.3 2.5 <br />Grade (%mckeQ I.0 I.0 <br />Reserves at both Mt Windarra and South <br />Windarra reduced in line with mine <br />production during the year. <br />10 <br />Production <br />