The Bushveld Complex stratigraphic sequence at Booysendal is similar to that found across the southern compartment of the eastern limb. The Critical Zone stratigraphy is fully developed. The middling between the UG2 and Merensky Reefs is in the order of 175 m in the northernand central portions of the property. The sequence is, however, subject to thinning in the far southern portion, which is linked to the RLS strata abutting onto a basement high. The impact of this "abutment" is further manifested in localised zones of disruption to surface morphology and internal structure of the two reefs. This has led to the characterisation of three geozones within the Booysendal site, these being the Normal, Slump and Abutment geozones. Despite this progressive disruption to the south, the reef surfaces are interpreted to be continuous across the property.

The internal structure of the UG2 Reef is similar to that found on the western limb, whereas the Merensky Reef is typical of the thick pyroxenite-type unit of the northern portion of the eastern limb as well as that of the southeastern portion of the western limb.

Merensky Reef
The Merensky Reef rests in the upper mineralised portion of the Merensky pyroxenite unit, generally extending over 110 cm. It is immediately overlain by a sequence of competent, norite bearing strata. A stringer chromitite layer may be present approximately 10 cm below the top of the Merensky pyroxenite. PGM and base metal mineralisa ........

Booysendal consist of two Mining Rights (MR), namely the Booysendal North MR and the Booysendal South MR (old Everest mine). These MR are managed as one operation divided into five operational areas. Booysendal North (the existing mining operation), BCM1, BCM2 and BS1/2 (all four of these areas are located on the Booysendal North MR), while the Valley Boxcut and the existing Everest mine (BS4) is located on the Booysendal South Mining Right.

The relatively large vertical separation of the reefs leads to separate districts for the UG2 and Merensky mining, accessed via separate development tunnels. The Booysendal North and South mines are underground, mechanised bord and pillar mines, accessed from surface via ramp decline systems.

The North UG2 mine decline system comprises three declines on the plane of reef and one decline situated 20 m into the footwall of the reef, containing a belt for ore handling. This footwall belt decline extends to 1 300 m in the down-dip direction from the UG2 outcrop, after which all decline development is on the plane of reef. An ore silo decouples the footwall and on-reef belt systems. Decline systems for the South UG2 mines comprise four declines on the plane of reef.

Mining sections extend over a dip length of 144 m, equating to a vertical interval of 25 m. Strike drives are inclined at 5° above the line of strike. Mechanised boom rigs and LHDs are employed in mining and development. Strike belts within the driv ........

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The Booysendal North mine comprises a UG2 and Merensky module. A unique reverse decline at North UG2 mine connects the concentrator plant and other mine infrastructure situated on a plateau with the on-reef declines that access the underground mine and outcrop on the side of the valley. This design has helped to minimise the mine footprint.[2019 AR, p. 64]

There is one 200 000tpm PGM concentrator plant on surface at the North mine, along with a dense media separation plant and a chrome spiral plant. [2019 AR, p. 64]

The South mine has a 250 000tpm PGM concentrator, with a chrome spiral plant and associated tailings facilities, as well as normal mining infrastructure such as offices, workshops, stores and access to underground workings. Booysendal South concentrator was commissioned in April 2019. [2019 AR, p. 51, 64]

Concentrating: Merensky and UG2 plants
• In the crushing/screening circuit, the ore is crushed to reduce its size before it goes to t ........