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South Africa

Finsch Mine

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Finsch Mine

Location: 36 km E from Postmasburg, South Africa

Regional Office:

Silver Point Office Park, Block 3, 22 Ealing Crescent, Bryanston
P.O. Box 71007
Johannesburg
South Africa
2021

Contacts:

Additional Resources for Suppliers & Investors

Categories

Overview

Mine TypeUnderground
StatusActive
Commodities
  • Diamond
Mining Method
  • Sub-level caving
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Mine Life... Lock
SnapshotFinsch is renowned for highly commercial goods of +5 carats and is rich in gem quality smaller diamonds.

A number of large +50 carat stones are also recovered annually. The mine can also produce very rare fancy yellow diamonds.

The mine’s production has been reduced to streamline operations and extend infrastructure life. Future extensions could continue mining to the 100 level into the late 2030s, without needing significant new infrastructure.

Owners

SourceSource
CompanyInterestOwnership
Government of South Africa 21.6 % Indirect
Petra Diamonds Ltd. 78.4 % Indirect
Petra Diamonds holds a 74% interest in Finsch Diamond Mine (Pty) Ltd, while the remaining 26% is split between two entities: the Itumeleng Petra Diamonds Employee Trust (IPDET), which holds a 12% stake, and Kago Diamonds, which holds 14%. Petra Diamonds has a 31.46% interest in Kago Diamonds through its commercial B-BBEE (Broad-Based Black Economic Empowerment) partners.

Contractors

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SourceSource

Deposit type

  • Kimberlite

Summary:

Finsch has an age of 118 ± 2.8 Ma (Smith et al., 1985), and is a Group-2 kimberlite (Smith, 1983a; Fraser and Hawkesworth, 1992). The geology of Finsch Mine in the open-pit and on the 348 m underground sampling level was described by Clement (1982). The pipe was emplaced through a thick sequence of Proterozoic, Griqualand West sequence sedimentary rocks comprising dolomites, banded iron formation and shales. Preserved within the pipe are large fragments of Karoo-aged sediments, lavas and dolerite which were clearly present at the time of emplacement, but have been subsequently eroded away.

Clement defined eight kimberlite varieties in the mine which he called F1–F8. F1 was described as being the most significant volumetrically and was classified as a diatreme-facies TKB. This variety hosted numerous very large blocks of down rafted Karoo basalt lava and sedimentary rocks. The F5 variety was also described as TKB, but occurred within a satellite portion of the pipe called “the precursor”. The other varieties were classified as hypabyssal kimberlite or kimberlite breccia.

Exploration of deeper levels of the mine found that the F8 variety increased in size with depth, and that the lithiccontent of the F1 declined with depth. Mapping of deeper levels has also revealed the presence of steeply dipping bedding planes within both the F1 and F8 varieties. Ekkerd et al. suggested that the F1 and F8 could be the same kimberlite, varying only in lithic content and alteration.

Reserves

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Mining Methods

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Comminution

Crushers and Mills

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Processing

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Production

CommodityProductUnits2024202320222021202020192018201720162015
Diamond Crystals k carats  ....  Subscribe  ....  Subscribe
Diamond Mineral k carats  ....  Subscribe  ....  Subscribe  ....  Subscribe1,7562,0732,1502,2142,066
^ Guidance / Forecast.

Operational metrics

Metrics2024202320222021202020192018201720162015
Tonnes processed  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe3,297,047 t3,879,368 t4,863,258 t5,843,716 t5,672,856 t
Annual ore mining capacity  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe
^ Guidance / Forecast.

Production Costs

Commodity production costs have not been reported.

Operating Costs

Currency202420232022202120202019201820172016
Total operating costs ($/t milled) ZAR  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe

Financials

Units20242023202220212020201920182017
Capital expenditures (planned) M USD
Capital expenditures M USD  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe 24.1   54   85.6  
Sustaining costs M USD  ....  Subscribe  ....  Subscribe 9.1   7.7   9.1  
Revenue M USD  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe 170.2   231.9   216.7  
Operating Income M USD  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe -37.8   68   101.7  
Operating Cash Flow M USD  ....  Subscribe  ....  Subscribe

Heavy Mobile Equipment

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Personnel

Mine Management

Job TitleNameProfileRef. Date
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EmployeesContractorsTotal WorkforceYear
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Aerial view:

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