Pan African Resources' subsidiary, Evander Gold Mines Proprietary Limited, owns 95% of the Evander Mines. Employees own 5% of the issued share capital of Evander Mines through an ESOP.
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Summary:
Evander Mines consists of 8 Shaft underground mine, a tailings retreatment operation Elikhulu and projects: Egoli project, Rolspruit, project, Poplar project, Evander South project.
8 Shaft
The Kimberley Reef is an oligomictic, pebbly conglomerate and comprises a composite sequence of channel sediments that define longitudinal gravel bars and sand bars with pebbly veneers. The reef in the area strikes in an east-west direction and dips to the north at about 10°. The area is also divided by two major normal faults, striking in an east-north-east to west-south-west direction. The reef thickness varies from a waste on contact up to a 50cm well-developed oligomictic conglomerate. Average reef thickness is 35cm within the 8 Shaft vicinity. High gold values in the Kimberley Reef are mostly located at the base of the unit and are associated with the presence of carbon and some visible gold on the footwall contact.
Mineralisation
Palaeo-placer and braided stream-type sedimentary deposit scavenged gold from the hinterland and underlying deposits. Mineralisation is concentrated in robust conglomeratic and carbonaceous units.
Gold is associated with disseminated sulphides in the form of pyrite. High grades occur where the reef is characterised by carbon specks or bands.
Elikhulu
The ore being treated at Elikhulu originated from the previously mined and metallurgically treated Kimberley Reef from the Winkelhaak, Leslie/Bracken and Kinross Mines as part of Evander Mines’ historical operations. The tailings of the treated material were deposited onto three TSFs that will be reclaimed in the following order: Kinross (the Kinross TSF facility was depleted in the reporting period), Leslie/Bracken and Winkelhaak. Post their processing, these TSFs will be consolidated into a modern, single, enlarged regional Kinross tailings extension facility, thus reducing Evander Mines’ environmental footprint and associated environmental impact.
Deposition material of historically treated metallurgical tailings from the Winkelhaak, Leslie/Bracken and Kinross Mines.
The material is confined to the deposition site of historical tailings and approximately 1m beneath the historical footprint. The ore consists of oxidised tailings containing pyrite-associated gold which was not recovered in the initial treatment process.
Egoli project
The Kimberley Reef is an oligomictic, pebbly conglomerate and comprises a composite sequence of channel sediments that define longitudinal gravel bars and sand bars with pebbly veneers. The reef in the area strikes in an east-west direction and dips to the north at about 10º. The reef thickness varies from a waste on contact up to a 50cm well-developed oligomictic conglomerate. Average reef thickness is 30cm within the 7 Shaft vicinity. High gold values in the Kimberley Reef are mostly located at the base of the unit and are associated with the presence of carbon and some visible gold on the footwall contact.
Rolspruit project
The Kimberley Reef strikes in an east-west direction and dips at 28° to the north, and has been intersected at an average depth of 2,300m below surface. The footwall sill break is an intrusive sill that is associated with a reverse fault, which resulted in a 90m displacement of the reef horizon. The Kimberley Reef at Rolspruit is a well-developed oligomictic conglomerate up to 1m thick, averaging about 37cm. In this area, the Kimberley Reef is very similar to that of the 8 Shaft with high gold grade values mostly located at the base of the unit, and associated with the presence of carbon and some visible gold on the footwall contact.
Poplar project
The Kimberley Reef occurs at a depth below surface of between 500m in the west and 1,200m in the east. The reef strikes north-south and dips 9° to 24° to the east. The Kimberley Reef comprises a sequence of fluvial, channel sediments that were deposited in a braided stream environment. Deposition of the reef was influenced by the footwall lithologies. The Kimberley Reef horizon has a channel width of approximately 30cm, generally a thin reef hosting high gold grades. The reef has north-east to south-west trending channels or payshoots which are evident in other parts of the Evander Basin.
A series of seven major, subparallel and fairly evenly spaced faults traverse the property. These are all orientated in a roughly north-northeast to south-south-west direction. Throws on these faults vary between 50m and 400m.
Evander South project
The Kimberley Reef at Evander South occurs at a depth of between 300m in the west and 1,200m in the east, below surface, with a north-south strike and dips between 6° and 19°. It comprises a sequence of fluvial channel sediments that were deposited in a braided stream environment with final deposition influenced by the footwall lithologies. The high-grade Kimberley Reef is associated with carbon and is a narrow, small pebble, clast-supported and well-packed oligomictic conglomerate. Carbon was observed in several of the borehole intercepts drilled at the Evander South project.