Name: Kloof mine.

Location: The Kloof mine is located in the Far West Rand goldfields of the Witwatersrand basin, near Westonaria, in Gauteng, South Africa.

Mine Owner/s: Sibanye-Stillwater.

Brief Description: Kloof is a large, shallow to ultradeep level gold mining and processing operation, with a life-of-mine until 2032.

The principal mining activity takes place on the Ventersdorp Contact reef. Additional reefs mined include the Middlevlei, Kloof and Libanon reefs. The orebody is accessed from surface using vertical shafts, with the deepest operating level about 3 347 m below surface.

Brief History: Mining operations have been conducted in the West Rand since the late nineteenth century and at Kloof in its current form since 2000, when several existing mining operations were amalgamated.

Kloof was one of the assets acquired by Sibanye when Goldfields International completed its February 2013 unbundling transaction.

Primary Metals: Gold.

Secondary Metals: None stated.

Geology/Mineralisation: The Ventersdorp Contact reef is the main exploited reef (73%), with additional secondary reefs mined being the Middelvlei reef (8%), Kloof reef (18%) and Libanon reef (1%). The secondary reefs occur as multicycle, wide-reef packages, which are highly channelised in nature and comprise a significant part of the mineral resources and reserves.

About 2% of the total planned gold production comes from the substantial surface mineral reserves in the form of shallow rock dumps.

Reserves: Total mineral reserves as at December 31, 2018, were estimated at 32.9-million tonnes grading 5.3 g/t gold.

Resources: Total mineral resources as at December 31, 2019, were estimated at 62.3-million tonnes grading 12.4 g/t gold.

Mining Method: Mining is focused on open ground and pillars using scattered conventional breast, mini-longwall stoping. Mining operations also take place on surface rock dumps.

Major Infrastructure and Equipment: The current mine infrastructure comprises five producing shaft complexes, including five subshafts, one tertiary shaft and one single lift shaft, as well as two gold processing plants – No 1 carbon-in-pulp, processing primarily surface rock dump material, and No 2 carbon-in-pulp, processing primarily underground ore.  

Prospects: Kloof is focused on optimising the mineral resource, stabilising production profiles at current performance levels, reducing pay limits through quality mining and cost reduction, targeting secondary reefs on an incremental basis above existing infrastructure and mining low-grade surface reserves to fill excess metallurgical capacity.

Contact Details:
Sibanye-Stillwater
Tel +27 11 278 9600
Email ir@sibanyestillwater.com
Website https://www.sibanyestillwater.com