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Placer Dome Gold and Silver Mine – Misima – Papua New Guinea

Producer of

Gold and silver


Misima Island, Papua New Guinea


Placer Dome Inc (80%), Orogen Minerals Ltd (PNG government) (20%)

Geology type

Epithermal gold and silver in schists, porphyries and greenstones

Mineral type

Disseminated Au and Ag

Reserve base

Stockpile due for depletion in 2004

Annual production

3,360kg Au and 15,342kg Ag (2003)

Mining method

Residual stockpile processing only

Processing method

Jaw and cone crushers, SAG mill, cyclones, CIP leaching



Open pit

Caterpillar 992C and 988B wheel loaders

Caterpillar 785 haul trucks

Caterpillar 773B water truck

Caterpillar 950B tyre manipulator

Caterpillar 16G road graders

Tamrock Driltech D40K blasthole drills


Fuller Traylor SAG mill

Fuller Traylor ball mill

Haywood Gordon agitation tanks

Enviroclear high-capacity thickeners

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