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South Africa

Burnstone Mine

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Summary

Mine TypeUnderground
StatusCare and Maintenance
Commodities
  • Gold
Mining Method
  • Breast mining
  • Scattered stoping
Mine Life... Lock
SnapshotBurnstone is a shallow, developmental-stage gold mine and processing operation. Formerly an active mine until being placed on care and maintenance in mid-2012, Burnstone includes two established shaft complexes, a carbon-in-leach gold processing plant, a tailings storage facility, and associated surface infrastructure and mining rights.

Following an updated Feasibility Study, the Sibanye-Stillwater Board gave approval for the continuation of the Burnstone project in early 2021. Consistent with the requirements of the Group’s capital allocation framework, development of the project was deferred following the capital review in H2 2023.

The Project remained on care and maintenance during 2024 and due to the lower prevailing PGM precious metal prices, the Group decided to continue deferring the capital expenditure at Burnstone during 2025.

Owners

SourceSource
CompanyInterestOwnership
Sibanye-Stillwater Ltd. 100 % Indirect
Sibanye Gold Eastern Operations (Pty) Ltd. (operator) 100 % Direct
The Burnstone project is 100% owned by Sibanye-Stillwater Ltd. through its subsidiary, Sibanye Gold Eastern Operations (Pty) Ltd.

Deposit type

  • Paleoplacer

Summary:

Burnstone lies within the Witwatersrand Basin and Archaean (2.7 billion year-old) sedimentary basin. The Basin is filled with approximately 14,000m sedimentary and subordinate volcanic rocks, which have been folded along a north east to south-west axis into an asymmetrical synclinorium. The sediments consist mainly of quartzites and shales and less prevalent, but generally economically important, gold-bearing conglomeratic zones, which occur on regional unconformities. These are commonly referred to as reefs or placers.

Burnstone is located in the South Rand Basin, a subsidiary of the main Witwatersrand Basin. The gold-bearing target UK9 Reef of the Kimberley Formation, occurs in the Central Rand Group of rocks. This reef lies between the outcrop and a depth of 1,300m below surface in the mining right area. Structurally, the project area is located on the northern limb of the arcuate South Rand Basin, which is locally deformed by a east-north-east-plunging anticline and cut by east-west and north-south normal faults, formed in response to the stress regime corresponding to the main structural feature of the region, which is the east-west striking Sugarbush Fault. This fault is a left-lateral wrench fault, which comprises the northern boundary of the South Rand Basin at this point.

Shallow gold deposit exploiting the UK9a Reef of the Kimberley Formation, Central Rand Group, Witwatersrand Supergroup.

The UK9a Reef is a thin (<1m), highly channelised, shallow dipping (<10º) orebody. The minimum mining cut includes waste to a total of 110cm.

Reserves

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Mining Methods

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Heavy Mobile Equipment

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Comminution

Crushers and Mills

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Processing

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Commodity Production

CommodityUnitsAvg. AnnualLOM
Gold koz 1382,000
All production numbers are expressed as metal in doré.

Operational metrics

Metrics
Annual mining capacity  ....  Subscribe
Annual ore mining rate  ....  Subscribe
Plant annual capacity  ....  Subscribe
* According to 2021 study.

Production Costs

CommodityAverage
Cash costs Gold  ....  Subscribe
Assumed price Gold  ....  Subscribe
* According to 2021 study / presentation.

Mine Financials

Units2021
Book Value M ZAR  ....  Subscribe

Project Costs

MetricsUnitsLOM Total
Initial CapEx $M ZAR  ......  Subscribe
After-tax NPV @ 15% $M ZAR  ......  Subscribe
After-tax IRR, %  ......  Subscribe
After-tax payback period, years  ......  Subscribe

Personnel

Mine Management

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required May 1, 2025

Workforce

Aerial view:

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