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South Africa
Gamsberg Mine

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 Location:
113 km NE from Springbok, South Africa

  Address:
1 Penge Road
Private Bag X01
Aggeneys
South Africa
Phone  ...  Subscription required
Fax+27-54-983-9244
EmailEmail
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Costs & Financials
  • Personnel
  • Filings & News

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Overview

StageProduction
Mine TypeOpen Pit
Commodities
  • Zinc
Mining Method
  • Truck & Shovel / Loader
Processing
  • Flotation
Mine Life30 years (as of Jan 1, 2019)
Latest NewsVedanta reopens Gamsberg zinc mine in South Africa     January 16, 2021


Owners & OPERATOR

Source:
CompanyInterestOwnership
Employee Share Ownership Plan (the ‘ESOP’) 6 % Indirect
Exxaro Resources Ltd. 24.4 % Indirect
Vedanta Resources plc. 69.6 % Indirect
Black Mountain Mining Pty Ltd (operator) 100 % Direct
Vedanta holds 69.6%. Exxaro Resources, a leading South African BEE company owns 24.4% and ESOP holds 6%.

Deposit Type

  • Broken Hill-type (BHT)


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.


Mining Methods

  • Truck & Shovel / Loader


Summary:

Gamsberg is one of the largest known, undeveloped zinc orebodies in the world and comprises an open pit mine and a dedicated processing plant.


Crushing and Grinding


Processing

  • Flotation

Flow Sheet: Subscription required

Summary:

During Phase 1, at full production capacity Gamsberg will produce 4 000,000 tonnes of ore from its open pit mine and 250,000 tonnes per annum of zinc-in-concentrate.

Studies into Gamsberg Phase 2 and 3 are underway which will see ore mined increase to 8 million tonnes per annum and production of zinc-in-concentrate to 450,000 tonnes, and, in a modular fashion, ultimately to 600,000 tonnes per annum. It will reflect an additional investment of US$350 to US$400 million.


Production:

CommodityUnits20202019
Zinc kt  ......  Subscription required ^  ......  Subscription required
All production numbers are expressed as metal in concentrate. ^ Guidance / Forecast.
Subscription required - Subscription is required.

Operational Metrics:

Metrics2019
Total tonnes mined  ......  Subscription required
Annual production capacity  ......  Subscription required
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Reserves at March 31, 2019:

CategoryTonnage CommodityGrade
Proven 50.3 Mt Zinc 6.8 %
Proven 50.3 Mt Lead 0.5 %
Probable 3.4 Mt Zinc 5.8 %
Probable 3.4 Mt Lead 0.5 %
Proven & Probable 53.7 Mt Zinc 6.7 %
Proven & Probable 53.7 Mt Lead 0.5 %
Measured 35.1 Mt Zinc 6.5 %
Measured 35.1 Mt Lead 0.6 %
Indicated 35.8 Mt Zinc 6.6 %
Indicated 35.8 Mt Lead 0.6 %
Inferred 17.9 Mt Zinc 6.7 %
Inferred 17.9 Mt Lead 0.5 %
Total Resource 88.8 Mt Zinc 6.6 %
Total Resource 88.8 Mt Lead 0.6 %

Commodity Production Costs:

CommodityUnits20202019
Cash costs Zinc USD  ......  Subscription required ^  ......  Subscription required
^ Guidance / Forecast.
Subscription required - Subscription is required.


Heavy Mobile Equipment:

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Sep 17, 2020
....................... Subscription required ....................... Subscription required Subscription required Sep 17, 2020
....................... Subscription required ....................... Subscription required Subscription required Sep 17, 2020
Subscription required - Subscription is required.

Staff:

EmployeesYear
Subscription required 2019

Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2018
................................... Subscription required 2018
Other 2015
Sustainability Report 2015
Subscription required - Subscription is required.

News:

NewsDate
Vedanta reopens Gamsberg zinc mine in South Africa January 16, 2021
Vedanta Zinc International advice of a Geotechnical Failure at Gamsberg November 17, 2020

Aerial view:

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