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South Africa
Burnstone Mine

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 Location:
8 km E from Balfour, South Africa

  Project Contacts:
Constantia Office Park Cnr 14th Avenue & Hendrik Potgieter Road Bridgeview House Ground floor
Weltevreden Park
South Africa
1709
Phone  ...  Subscription required
Fax+27-11-278-9863
WebsiteWeb
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Costs & Financials
  • Fleet
  • Personnel
  • Filings & News

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Overview

StageRestarting
Mine TypeUnderground
Commodities
  • Gold
Mining Method
  • Breast mining
  • Scattered stoping
Mine Life24 years (as of Jan 1, 2021)
In the first quarter of 2021 the Sibanye-Stillwater Board gave approval to restart the Burnstone project, following the completion of the revised mining study.


Owners

Source: p. 9
CompanyInterestOwnership
Sibanye-Stillwater Ltd. 100 % Indirect
Sibanye Gold Eastern Operations (Pty) Ltd. (operator) 100 % Direct
Ownership Tree

Contractors

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Deposit Type

  • Conglomerate hosted


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 channe ........


Mining Methods

  • Breast mining
  • Scattered stoping


Summary:

The Burnstone project has two established access points into the underground workings: a three-legged decline shaft and vertical shaft.

The mine is accessible via an existing decline shaft and an equipped vertical shaft. To access the down-dip extents of the orebody a number of declines have been planned and development is progressing. Underground infrastructure includes the shaft, silos, conveyors, chutes and rock breakers on the main rock handling levels at the shaft, loading boxes in the shaft, workshops, clarification and pumping systems, water dams and electrical reticulation and communication systems. Excavations include pump stations, settlers, declines, horizontal drives and stoping infrastructure. There is a limited fleet of underground trackless mining machines (TMM) including one roof bolter, one dump truck, one development rig, one long hole rig, two LHDs, two graders, utility vehicles, Manitou forklifts, and LDVs. Production and development drilling are by hydropower and power packs.

All surface infrastructure to support the underground mining is in place or has been planned in the LoM with an appropriate capital estimate. The current trackless fleet, which will be used to develop, has been scheduled for replacement or refurbishment in the LoM capital estimate. A mineral processing plant is situated next to the vertical shaft where the bulk of the tonnage will be hoisted. It is currently on care-and-maintenance and will be started after a y ........


Crushing and Grinding
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Processing

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Summary:

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Projected Production:

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

Operational Metrics:

Metrics
Annual mining capacity  ......  Subscription required
Plant annual capacity  ......  Subscription required
Annual ore mining rate  ......  Subscription required
^ Guidance / Forecast.
* According to 2021 study.
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Reserves at December 31, 2021:
Average Weighted Resource cut-off 450 cm.g/t.

CategoryTonnage CommodityGradeContained Metal
Probable 20.6 Mt Gold 3.9 g/t 2.6 M oz
Measured 1.1 Mt Gold 6.2 g/t 0.2 M oz
Indicated 25.5 Mt Gold 5.6 g/t 4.6 M oz
Measured & Indicated 26.6 Mt Gold 5.7 g/t 4.8 M oz
Inferred 31.5 Mt Gold 4.2 g/t 4.3 M oz
Total Resource 58.1 Mt Gold 4.9 g/t 9.1 M oz

Commodity Production Costs:

CommodityAverage
Cash costs Gold  ......  Subscription required&nbs
Assumed price Gold  ......  Subscription required *
* According to 2021 study / presentation.
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Financials:

Units20222021
Capital expenditures (planned) M ZAR  ......  Subscription required
Book Value M ZAR  ......  Subscription required
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2021 Study Costs and Valuation Metrics :

MetricsUnitsLOM Total
Initial CapEx $M ZAR  ......  Subscription required
After-tax NPV @ 15% $M ZAR  ......  Subscription required
After-tax IRR, %  ......  Subscription required
After-tax payback period, years  ......  Subscription required
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Heavy Mobile Equipment as of December 31, 2021:
HME TypeQuantity
Bolter ....................... Subscription required
Drill ....................... Subscription required
Drill (long hole) ....................... Subscription required
Forklift ....................... Subscription required
Grader ....................... Subscription required
Load-Haul-Dump (LHD) ....................... Subscription required
Truck (dump) ....................... Subscription required
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Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Jul 21, 2022
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Staff:

EmployeesContractorsTotal WorkforceYear
Subscription required Subscription required Subscription required 2021
Subscription required Subscription required Subscription required 2020
Subscription required Subscription required Subscription required 2019
Subscription required Subscription required Subscription required 2018
Subscription required Subscription required Subscription required 2017
Subscription required Subscription required Subscription required 2016

Corporate Filings & Presentations:

DocumentYear
Corporate Presentation 2022
Corporate Presentation 2022
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
Integrated Report 2018
Year-end Mineral Reserves 2018
Form 20-F 2017
Year-end Mineral Reserves 2017
Feasibility Study Report 2016
Form 20-F 2016
Year-end Mineral Reserves 2016
Year-end Mineral Reserves 2015
Subscription required - Subscription is required.

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