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  Kloof

Kloof

Kloof main shaft complex  
During financial 2010 Kloof produced 566,500 ounces of gold at a cash cost of R187,154 per kilogram (US$768 per ounce) and an NCE of R256,962 per kilogram (US$1,054 per ounce).
During the year to June 2011 the outlook for Kloof is to produce between 578,700 and 643,000 ounces of gold at a cash cost of between R180,000 and R195,000 per kilogram and an NCE of between R233,000 and R250,000 per kilogram.
Kloof main shaft complex    

The Kloof Gold Mine, which is located 60 kilometers west of Johannesburg, near Westonaria in the Gauteng province of South Africa, has produced more than 70 million ounces of gold during its 75-year life and was, in its heyday, known as the richest gold mine in the world. While this mine is now in the late summer of its life, it still has a massive 77.9 million ounces of gold Mineral Resources, of which 9.5 million ounces are in Mineral Reserves. A significant opportunity for Kloof is to increase mining flexibility through the development of reserves, and thus extend the life of this mine. Like Driefontein, its neighbouring sister mine, Kloof is a large, well-established intermediate to ultra-deep-level gold mine with its lowest working level some 3,350 meters below surface. Geologically Kloof is located on the main north-western rim of the Witwatersrand Basin and exploits auriferous palaeoplacers (reefs), namely the Ventersdorp Contact Reef (VCR) that constitutes 85 per cent of the underground Mineral Reserve ounces, the Middelvlei Reef (MR), 11 per cent, and two per cent from the Kloof Reef (KR). Kloof consists of five producing shaft systems and two gold plants of which 1 Plant processes surface material while 2 Plant process underground ore.

Gold produced
(’000oz)
 
New ammonia plant cooling towers at Kloof, 3 Shaft
New ammonia plant cooling towers at Kloof, 3 Shaft
 
Surface man winder at Kloof, 4 Shaft
Surface man winder at Kloof, 4 Shaft
Gold produced (’000oz)    

      F2010 F2009 F2008 F2007 F2006
Main development Advanced km 23.1 22.8 33.6 35.0 30.4
Main on-reef development Advanced km 4.0 3.7 5.0 6.1 7.3
  Value cm g/t 2,396 1,777 1,717 1,410 1,788
Area mined   ’000m2 400 428 519 620 607
Productivity   m2 /TEC* 2.1 2.2 2.6 2.9 3.4
Tonnes milled Underground ’000 2,378 2,398 2,941 3,447 3,206
  Surface ’000 1,921 921 1,012 382 460
  Total ’000 4,299 3,319 3,953 3,829 3,666
Yield Underground g/t 6.8 8.1 8.4 8.2 8.7
  Surface g/t 0.7 0.7 0.9 1.2 1.1
  Combined g/t 4.1 6.0 6.5 7.5 7.8
Gold produced Underground kg 16,225 19,316 24,587 28,260 27,915
  Surface kg 1,399 682 946 445 514
  Total kg 17,624 19,998 25,533 28,705 28,429
  Total ’000oz 567 643 821 923 914
Operating costs Underground R/t 1,398 1,254 893 727 703
  Surface R/t 52 84 62 82 61
  Total R/t 797 929 680 662 622
Gold sold   kg 17,624 19,998 25,533 28,705 28,429
Total cash cost   US$/oz 768 507 430 366 374
    R/kg 187,154 146,930 100,419 84,672 76,918
Notional cash expenditure   US$/oz 1,054 698 601 498 472
    R/kg 256,962 202,140 140,512 115,377 97,200
Net earnings   Rm 172.5 772.8 947.9 790.3 209.9
Capital expenditure   Rm 1,104.4 958.6 897.7 775.8 482.7

* TEC = total employees costed.