Overview
Stage | Production |
Mine Type | Open Pit |
Commodities |
|
Mining Method |
|
Production Start | ... |
Mine Life | 2041 |
The Gamsberg, one of the largest deposits in the world. Gamsberg Mining Operations comprises surface mining operation and processing plant.
Gamsberg Phase 2 project includes the mining expansion from 4 MTPA to 8 MTPA and Construction of New Concentrator plant of 4 MTPA, taking the total capacity to 8 MTPA. Completion of construction activities of Gamsberg Phase 2 project with aim to start production in H2 FY2024. Full ramp-up of Gamsberg Phase 2 project in FY 2025. |
Source:
p. 2
Company | Interest | Ownership |
Employee Share Ownership Plan (the ‘ESOP’)
|
4.57 %
|
Indirect
|
Exxaro Resources Ltd.
|
24.77 %
|
Indirect
|
Vedanta Resources plc.
|
70.66 %
|
Indirect
|
Black Mountain Mining Pty Ltd
(operator)
|
100 %
|
Direct
|
Contractors
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Summary:
The Broken Hill deposits form part of the Bushmanland Group which is a volcano- sedimentary sequence that hosts ore deposits (Reid et al., 1997). This group has metapelitic rocks that are CaNa-Mg depleted. The group’s ore body is divided into two types: a pyrrhotite-galena-sphaleritechalcopyrite ore hosted by quartz-garnet-rich gangue (Black Mountain and Broken Hill) and a pyrite-pyrrhotite-sphalerite ore hosted by quartz- biotite-sillimanite gangue (Big Syncline and Gamsberg). The principal ore minerals are sphalerite, galena and chalcopyrite with garnet and apatite being minor constituents. Barite horizons occur as lateral equivalents of the sulphide ores at Black Mountain and Gamsberg and calcitic marble bands are associated with the Big Syncline and Gamsberg (Moore et al., 1990).
Despite the discovery of Gamsberg zinc deposit in 1972, the ore body continues to be South Africa’s greatest unexploited base metal resource. Regardless of its size, the low zinc and high manganese content of the sphalerite combined with the low zinc price prohibits the development of the deposit. The high manganese content of the sphalerite makes it unsuitable for processing by conventional methods i.e. roasting, leaching/ solvent extraction and/or electrowinning (McClung & Viljoen, 2011). The ore body has two distinct ore types, namely pelitic and garnetmagnetite ore. The pelitic ore is characterized by a high Fe-suphide content whilst the garnet-magnetite ore have higher levels of ........
Summary:
The final open pit is expected to cover an area of 600 ha, with a final depth of 650 m, and a width and length of 2 220 m and 2 700 m respectively.
Loading and hauling of ore and overburden is performed in the pit using a fleet of large capacity shovels, loaders, excavators, haul trucks and other service equipment. The ore is hauled to the primary crusher and overburden to the waste rock dump using large capacity haul trucks (typically between 220 tonne (t) and 300 t capacity).
The primary crusher is located adjacent to the open pit on a flat point of the V-cut access road along the northern slope of the inselberg. The crushed ore is transported from the primary crusher and the Run of Mine (ROM) stockpile to the processing plant via a conveyor system.
An estimated 1.5 billion tonnes of waste rock will be generated during the LoM. The haul trucks transport the waste material to the edge of the inselberg where it is tipped over the edge to form a waste rock dump expected to cover 490 hectares.
Gamsberg Phase 2 project approved by the Vedanta Board. Project includes the mining expansion from 4 MTPA to 8 MTPA.
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Flow Sheet:
Summary:
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Pipelines and Water Supply
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Reserves at March 31, 2023:
Category | Tonnage | Commodity | Grade |
Proven & Probable
|
91.6 Mt
|
Zinc
|
6 %
|
Proven & Probable
|
91.6 Mt
|
Lead
|
0.5 %
|
Measured & Indicated
|
60.2 Mt
|
Zinc
|
7.1 %
|
Measured & Indicated
|
60.2 Mt
|
Lead
|
0.6 %
|
Inferred
|
126.4 Mt
|
Zinc
|
7.3 %
|
Inferred
|
126.4 Mt
|
Lead
|
0.5 %
|
Commodity Production Costs:
| Commodity | Units | 2023 | 2022 | 2021 | 2020 | 2019 |
Cash costs
|
Zinc
|
USD
|
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