Mimosa is located on the Wedza Geological Complex on the Zimbabwean Great Dyke 20 kilometres west of the town of Zvishavane, 150 kilometres east of Bulawayo.

The Great Dyke is a layered complex similar to that of the Bushveld Complex. It extends for 550 kilometres and has a maximum width of 11 kilometres. Within the Great Dyke four geological complexes are known to contain PGM and base metal deposits. These are the Wedza Complex (Mimosa – Aquarius and Implats), Selukwe Complex (Unki – Anglo Platinum), the Hartley Geological Complex (Hartley and Ngezi Platinum Mines – Zimplats) and the Musengezi Complex. The Hartley Geological complex is the largest of the PGM bearing complex’s containing 80% of the known PGM resources in Zimbabwe.

The stratigraphy is broadly divided between a lower ultramafic and an overlying mafic sequence. The ultramafic sequence hosts the P1 pyroxenite, directly below the mafic-ultramafic contact, which in turn hosts the economic PGM bearing Main Sulfphide Zone (MSZ). The MSZ is a continuous layer between 2 and 3 metres thick that forms an elongated basin. Optimal mineralisation varies and, in contrast to the Bushveld Complex, is often difficult to follow visually. Peak values for the PGM and base metals are commonly offset, while the proportions between platinum and palladium also vary vertically.

The Mimosa lease encompasses four areas namely North Hill, South Hill, Mtshingwe Block and Far South Hill. These areas covering some 6,590 hectares, are separated by major faults. Unlike much of the Great Dyke, Mimosa has a well defined grade profile with an identifiable reef horizon marker facilitating grade control.

Mimosa holds contiguous mining rights over 6 591 hectares on the North Hill, the South Hill, Mtshingwe Block and Far South Hill orebody areas. The orebody is shallow and mining commences at a depth of 150 metres below the surface and extends to a depth of approximately 200 metres. The bord and pillar mining method is employed and stoping widths average around 2 metres. Mining bords advance along the strike.

The mining cycle involves mechanised support drilling and installation, mechanised face drilling, charging and blasting, and mechanised lashing onto a conveyor network to an underground bunker. From the bunker ore is conveyed out to a surface stockpile.

Mimosa has a concentrator plant on site where initial processing is done.

Concentrate is transported by road to Impala Platinum’s Mineral Processes in Rustenburg in terms of a life-of-mine offtake agreement with Impala Refining Services (IRS). Mimosa is evaluating various alternatives for the beneficiation of its material within Zimbabwe.