The innovative Mark IV high-technology machine that AngloGold Ashanti is developing to improve the economics of gold mining in South Africa’s low-height, hard-rock reef is continuing to make progress, AngloGold COO South Africa Chris Sheppard said on Monday. Speaking at Monday’s presentation of half-year results, Sheppard said in response to Mining Weekly Online that the machine was continuing to show pleasing progress ahead of its ultimate design still having to be determined.