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  Tarkwa

Tarkwa

Driefontein’s No 1 plant during winter at dusk  
During financial 2010 Tarkwa produced 720,700 ounces of gold at a cash cost of US$536 per ounce and an NCE of US$743 per ounce.
For the 12 months to end-June 2011 the outlook for Tarkwa is to produce between 720,000 and 760,000 ounces of gold at a cash cost of between US$580 and US$605 and an NCE of between US$835 and US$860 per ounce.
CIL plant at night.    

The Tarkwa Gold Mine is located in south-western Ghana, about 300 kilometers west of Accra, the capital of Ghana. It is situated some four kilometers west of the town of Tarkwa, which has good access roads, an established infrastructure and is served by a main road connecting to the port of Takoradi some 60 kilometers away at the Atlantic coast. The infrastructure of the mine consists of six open pits, two heap leach facilities, and a CIL plant. The ore body consists of a series of sedimentary banket quartz reef units (conglomerates) of the Tarkwain System, that are similar to those mined in the Witwatersrand Basin of South Africa. The operation is currently mining multiple-reef horizons from open pits and there is potential for underground mining in the future. Tarkwa has a Mineral Resource of 15.3 million gold ounces and a Mineral Reserve of 9.9 million ounces.

Gold produced
(’000oz)
 
Plant conveyor before sunset
Plant conveyor before sunset
 
Load and haul before sunset
Load and haul before sunset
Gold produced (’000oz)    

  F2010 F2009 F2008 F2007 F2006
Open-pit mining
Waste mined ’000t 112,424 110,895 93,440 85,508 75,899
Ore mined ’000t 21,707 21,689 19,901 22,074 21,037
Head grade g/t 1.0 1.1 1.2 1.2 1.2
Strip ratio W:O 5.2 5.1 4.7 4.0 3.6
Processing
Tonnes processed Milled ’000t 11,182 7,733 5,571 5,620 4,687
  Heap leach ’000t 11,534 13,540 16,464 17,019 16,800
  Total ’000t 22,716 21,273 22,035 22,639 21,487
Yield Milled g/t 1.4 1.4 1.5 1.5 1.6
  Heap leach g/t 0.7 0.7 0.7 0.8 0.9
  Combined g/t 1.0 0.9 0.9 1.0 1.0
Gold produced Milled ’000oz 502 314 267 272 471
  Heap leach ’000oz 218 298 379 425 238
  Total ’000oz 721 612 646 697 709
  Total kg 22,415 19,048 20,095 21,684 22,060
Total cash cost   US$/oz 536 521 430 333 292
Notional cash expenditure   US$/oz 743 881 766 512 364
Net attributable earnings   US$m 133.6 71.1 105.1 83.1 69.6
Capital expenditure   US$m 148.6 201.1 212.0 107.7 46.8