Saxendrift Mine

Saxendrift Mine Location

Background

The 5,142 hectare Saxendrift Mine property is located on the south bank of the Middle Orange River and adjacent to the Wouterspan property.

Four kilometres from the Saxendrift processing plant is the 616 hectare Saxendrift Extension property (acquired in 2012); through its integration into the Saxendrift mine plan, it has extended the mine life of Saxendrift’s processing infrastructure to seven years.

Geology

The property consists of a number of different terrace levels (Terraces A to D). Each terrace has its own distinctive characteristics which have been defined by the varying influence of the Vaal River and the upper Orange River.

The gravels of the Upper Terraces (Terraces A and B) are comprised of a boulder-gravel, overlain by an upward-fining alluvial sequence of upper gravels and sand lenses. The gravels of the Lower terraces (Terraces C and D) of the Middle Orange River are typified by up to 30% sand matrix with a high proportion of zeolite-rich sand lenses and a high proportion of red Drakensberg basalt clasts.

Processing Plant

The Saxendrift processing plant has a nameplate capacity of 160,00m3 per month and processes gravels from the Saxendrift and Saxendrift Extension mining areas.

Ore preparation Ore Enrichment Final/Recon recovery machines
Trommel Screen De-sanding Screen Scrubber Pans Flow Sort Machine
4x450tph 1x650tph 4 x 150tph 4 x 50tph 12x (17tph total)

 

Mining

The type of gravel being mined dictates the machinery used and manner in which the gravels will be excavated. The Saxendrift and Saxendrift Extension properties comprise both Rooikoppie and palaeo gravels.
The Rooikoppie gravels that cap the packages are mined by means of; excavator that loads the fairly loose gravels onto articulated dump trucks and then transported to the plant.
The palaeo gravels have a silcreted cap, the degree of hardness dictates if blasting will be required. These gravels at Saxendrift do generally not require blasting
Once sufficient liberation has been achieved gravels are loaded by means of excavators onto articulated dump trucks and transported to the processing plants. The Saxendrift makes use of rotary pans with flowsort recovery machines.
Tailings are transported back to the current mining areas after processing, using articulated dump trucks. A tyre dozer or bulldozer is used to flatten these rehabilitation areas.

Download the Technical Reports

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Saxendrift Resource Summary June 2015

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Revised Technical Report on the Saxendrift Alluvial Diamond Mine