Overview
Stage | Production |
Mine Type | Open Pit |
Commodities |
|
Mining Method |
|
Production Start | ... |
Mine Life | 2031 |
Kalgold is an open-pit mining operation. The mine extracts ore from a series of satellite orebodies, situated along a six Kilometre North-South striking BIF deposit zones. Kalgold has its own processing plant situated adjacent to the mine.
Exploration drilling at Kalgold has yielded favourable results, with the completion of the FY24 drilling programme the operation has the potential to be further expanded. |
Source:
p. 89,166
Kalgold is wholly-owned and operated by Harmony.
Contractors
- Subscription is required.
Deposit Type
- Banded iron formation hosted
Summary:
The Kraaipan Greenstone Belt forms part of the Kaapvaal Craton and is overlain by late Archaean Ventersdorp lavas and tertiary sediments. The Kraaipan Group consists of three formations: the Khunwana, Ferndale and Gold Ridge formations. The Gold Ridge Formation is the oldest and contains banded iron formations, the host rock of gold mined in the Kalahari Goldridge deposits.
The Kalgold operation is located within the geological terrain of the Archaean Kraaipan Greenstone Belt. This greenstone environment is exposed in discontinuous outcrops of steeply dipping rocks, which define three narrow, sub-parallel belts that strike approximately north- south. The Goldridge deposits occur within the central belt, which comprises banded iron formations, magnetite quartzite, chert, greywacke, shale and schist. The greenstones are surrounded by intrusive granites and gneisses. These rocks have a complex history of deformation, which includes folding, faulting and shearing.
Younger cover rocks include isolated patches of lavas of the Ventersdorp Supergroup with much of the area blanketed by Aeolian Kalahari sands. Sparse outcrops of quartz porphyry belonging to the Makwasie Formation also occur. Several large dykes with a predominant east-west trend have intruded the region.
The geology of the lease area and its immediate vicinity is characterised by ferruginous chemical and clastic sediments inter-bedded with metalavas and non-ferruginous meta-sedimenta ........
Summary:
Kalgold is an open-pit mining operation, applying a 10-metre benches mining strategy.
The A Zone and the Watertank pits have been merged to form one active pit situated to the north of the D Zone at a similar stratigraphic position. The A Zone-Watertank pit has an overall strike of ~2 300m and comprises two zones of mineralisation, which dip steeply towards the east. Reef widths range between 15m to 120m.
The latest pit optimisation and design resulted in the inclusion of the Henry and Windmill pits to the current A Zone-Watertank pit mining operation. The Windmill pit is separate towards the north of the mining right area, while Henry’s pit forms a southern extension to the A Zone-Watertank pit.
The variable nature of the grade distribution in the orebody results in the mining of multiple categories of rock, from waste to high-grade ore in one mining pass. Mining is conducted by mining contractors with the operation being managed by Harmony. Current mining capacity is limited to approximately 900 000 tonnes a month. The low-grade ore and waste rock are transported to dedicated locations north of the N18 road, while the high-grade ore is transported to the processing plant, south of the N18 road.
Ore and waste material are transported separately, with ore being trucked from the pit to the plant ROM pad, and waste rock going to the mine's waste dumps. Marginal and low-grade ore is transported by truck and stockpiled for future processing.
Source:
- subscription is required.
Source:
Summary:
- subscription is required.
Reserves at June 30, 2023:
The Mineral Reserves are reported using a cut-off grade of 0.60g/t determined using a gold price of US$1,582/oz gold.
The Mineral Resources are reported using a cut-off value of 0.54g/t and a gold price of US$1,764/oz.
Mineral Resources are reported inclusive of Mineral Reserves.
Category | Tonnage | Commodity | Grade | Contained Metal |
Proven
|
5.4 Mt
|
Gold
|
0.93 g/t
|
160 koz
|
Probable
|
8.5 Mt
|
Gold
|
0.85 g/t
|
232 koz
|
Proven & Probable
|
13.9 Mt
|
Gold
|
0.88 g/t
|
392 koz
|
Measured
|
8.5 Mt
|
Gold
|
1.02 g/t
|
277 koz
|
Indicated
|
39.7 Mt
|
Gold
|
1.14 g/t
|
1,460 koz
|
Inferred
|
25.4 Mt
|
Gold
|
0.34 g/t
|
278 koz
|
Total Resource
|
73.6 Mt
|
Gold
|
0.85 g/t
|
2,015 koz
|
Corporate Filings & Presentations:
- Subscription is required.
- Subscription is required.