Geology

Enlarge schematic geologic section

Northam mines both the Merensky and the UG2 reefs, both of these reefs being well-recognised ore bodies, with lateral continuity well established across the Northam mine lease area. Major geological features are normally water bearing.

The Merensky reef is characterized by the normal reef sub facies and the regional pothole sub facies. The regional pothole sub facies is further divided into three different reef types, of which the P2 reef type is the most prospective. Reef type changes are difficult to predict without an extensive prospect drilling programme, which is in place.

The UG2 reef occurs between 38 and 20 metres below the Merensky reef and displays more consistent characteristics than those of the Merenksy reef, with insignificant reef disturbances. As a result the UG2 reef is not currently subdivided into different facies.

Enlarge map of major geological features in the Northam lease area

Northam’s mine life is estimated at 16 years, based on current infrastructure and including resources from above 2 level to 14 level.

Four main water fissures have been delineated across the lease area. Mining operations have exposed and successfully traversed through three of the fissures, viz the Little John Dyke, the 37 line fault and the 41 line fault. The remaining 20 line fissure has been traversed on all levels apart from 2, 6 and 7 levels.

More on the Merensky and UG2 Reefs