western areas gold mining south africa. western areas gold mining south africa. jci limitedwikipedia, the free encyclopedia. jci was a major force in south african mining for over 100 years.in 1913 jci bought the randfontein estates gold mining company, which was aand mining was developed at western areas on the other side of the shallow valley,list of gold mines in south africa briefly,jul 09, 2019 mponeng gold mine is also the deepest mine in the world, reaching depths of more than 4km below the surface. mponeng is owned and run by anglogold ashanti, one of the top mining companies in south africa, and it is among the world leaders in the production of this most-wanted stone. mining in mponeng started in 1986.