Overview
| Stage | Production |
| Mine Type | Open Pit |
| Commodities |
|
| Mining Method |
|
| Production Start | ...  |
| Mine Life | 13 years (as of Jan 1, 2021) |
Source:
p. 231
Sishen and Kolomela are fully owned by the Sishen Iron Ore Company (SIOC). Kumba Iron Ore Limited has a 76.3% interest in SIOC (2020: 76.3%). Including shares held by Kumba Iron Ore in relation to its own employee share schemes, the Group’s effective interest in Kumba Iron Ore is 69.97% (2020: 70.04%). Consequently, the Group’s effective interest in SIOC is 53.4% (2020: 53.4%).
Contractors
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Summary:
The Kolomela mine orebodies comprise hard, high-grade, conglomeratic and laminated haematite orebodies. The ores have been preserved as three separate orebodies within basinal and graben structures up to 2km long, 400m wide and 300m deep.
The Welgevonden deposit, also known as the Sishen South deposit, is located on the southern extremity of the Maremane Dome, 9 km southwest of the town of Postmasburg and 65 km south of Sishen Mine. The deposit is made up of several smaller ore bodies and is currently mined at Kolomela Mine under the ownership of Kumba Iron Ore.
The only BIF present at Welgevonden appears to be that of the Kuruman Iron Formation, with the Griquatown Iron Formation having been removed by erosion. The main structural characteristic in the west of the Welgevonden area is the Wolhaarkop Dome, an overturned anticline replicating the larger Maremane Dome, which occurs in the east of the deposit.The ore bodies are intensely folded and faulted, and are preserved within erosional remnants that are not as continuous, but are of similar structural types to those encountered at Sishen.
Two tectono-stratigraphic settings for the ore bodies have been defined by Alchin and Botha: a palaeosinkhole-hosted setting applicable to the Ploegfontein, Leeuwfontein and Klipbankfontein ore bodies; and a synclinal basin setting applicable to the Welgevonden and Kapstevel ore bodies. Marginal deformational effects, thought to be related to the ~2.2 Ga ........
Summary:
The Kolomela Mine is conventional drill and blast and truck and shovel open-pit operations with ex pit ore at Kolomela hauled to designated finger stockpiles from which a run-of-mine blend is delivered. The Kolomela finger stockpiling is necessary to produce the correct run-of-mine blend for the predominantly DSO operation.
Currently, the Leeuwfontein, Klipbankfontein and Kapstevel North ore bodies are mined. The 2021 LoM plan also includes mining of the Kapstevel South ore body with waste
stripping that commenced in 2020.
The iron ore is loaded according to blend (grade) requirements and transported to designated run-of-mine finger stockpiles dependent on the Fe grade and contaminant grade of the load.
Kolomela is increasingly investigating strategies for the backfilling of waste rock into the opencast pits and have already commenced with the backfilling of the Leeuwfontein Pit. The footprint of the approved Leeuwfontein Waste Rock Dump (WRD) will result in the complete backfilling of the Tierbult Pit and Ploegfontein South Pit areas and the northern section of the Leeuwfontein Pit. The establishment of the approved Kapstevel WRD will result in the backfilling of the Kapstevel North Pit. It is proposed to extend the backfilling footprint to incorporate the remaining section of the Leeuwfontein Pit and the Klipbankfontein Pit.
Source:
Summary:
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Reserves at December 31, 2021:
Ore Reserves are reported above a cut-off of 50.0 %Fe.
Mineral Resources are reported above a cut-off of 50.0 %Fe
| Category | OreType | Tonnage | Commodity | Grade |
|
Proven
|
|
102 Mt
|
Iron
|
63.8 %
|
|
Probable
|
|
33 Mt
|
Iron
|
63.3 %
|
|
Probable
|
Stockpiles
|
11.5 Mt
|
Iron
|
63.3 %
|
|
Proven & Probable
|
|
135 Mt
|
Iron
|
63.7 %
|
|
Proven & Probable
|
Stockpiles
|
11.5 Mt
|
Iron
|
63.3 %
|
|
Measured
|
|
30.5 Mt
|
Iron
|
64.8 %
|
|
Indicated
|
|
59.8 Mt
|
Iron
|
63.1 %
|
|
Indicated
|
Stockpiles
|
8.7 Mt
|
Iron
|
55.2 %
|
|
Measured & Indicated
|
|
90.4 Mt
|
Iron
|
63.7 %
|
|
Measured & Indicated
|
Stockpiles
|
8.7 Mt
|
Iron
|
55.2 %
|
|
Inferred
|
|
6.6 Mt
|
Iron
|
64.8 %
|
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