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Botswana
Jwaneng Mine

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 Location:
8 km N from Jwaneng, Botswana

  Address:
Private Bag 002
Jwaneng
Botswana
Phone  ...  Subscription required
Fax+ 267 588 0143
EmailEmail
WebsiteWeb
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Personnel
  • Filings & News

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Overview

StageProduction
Mine TypeOpen Pit
Commodities
  • Diamond
Mining Method
  • Truck & Shovel / Loader
Processing
  • Dewatering
  • Dense media separation
  • X-Ray sorting
Mine Life16 years (as of Jan 1, 2019)
Jwaneng Mine is the richest diamond mine in the world by value.
Latest NewsThiess wins $1.7bn contract at world’s richest diamond mine     March 18, 2019


Owners & OPERATOR

Source:
CompanyInterestOwnership
Thiess Pty Ltd. (operator)
Anglo American plc. 42.5 % Indirect
Government of the Republic of Botswana (GRB) 57.5 % Indirect
Anglo American owns 85% of De Beers Group, the world's leading diamond company. The remaining 15% is owned by the Government of the Republic of Botswana (GRB). De Beers Group and its partners produce around one third of the world's rough diamonds, by value.

Debswana is a joint venture between the government of Botswana and the South African diamond company De Beers; each party owns 50% of the company.

Deposit Type

  • Kimberlite


Summary:

The geological environment at Jwaneng Mine in Botswana is characterized by a complex faulting system that preceded the emplacement of kimberlite into the Transvaal sedimentary sequence.

Jwaneng mine is located in a region that forms part of the semi arid eastern Kalahari Desert in south – central Botswana with most of the area being covered by thick (50 to 80m) superficial deposits.

The regional geology comprises a depositional sequence of dolomites, shales and quartzites laid down in Proterozoic times. Dolomites are well known karstified aquifer systems in Botswana and South Africa and it is for this reason that the initial conceptual hydrogeological model assumed them to be potentially water bearing and hence required investigations for active dewatering as mining progressed deeper. In the vicinity of the mine, the strata dip 20-40 towards the northwest and the sequence is broken up by extensional shears, thrusts and steep block faults.

The Jwaneng orebody itself comprises three kimberlite pipes (and a fourth minor kimberlite intrusion) that have intruded the host rocks along the predominant NE-SW trending steep fault orientation.


Mining Methods

  • Truck & Shovel / Loader


Summary:

Jwaneng is an open pit mine, using traditional truck and shovel methods.

Jwaneng Mine Pit:
• 1.4km width
• 2km length
• ˜410m deep.


Crushing and Grinding


Processing

  • Dewatering
  • Dense media separation
  • X-Ray sorting

Flow Sheet: Subscription required

Summary:

The Jwaneng Aquarium plant houses two classes of technology, CARP (Completely Automated Recovery Plant) and FISH (Fully Integrated Sort House).

The new Aquarium processes uses proven state-of-the art technology to recover diamonds using X-ray and laser sorting technology.

Dense Medium Separation (DMS) concentrate from both the recrush plant and the main treatment plant is stored in each plant’s respective 240 tons head feed bin, from where it is transferred by a belt weigh-feeder into a dewatering screen. The dust fraction from the dewatering screen is removed through the effluent system while the oversize fraction is recycled to the recrush plant through a sicon conveyor. The old recovery tailings go through a similar feed preparation stage. The concentrate from the de-watering screen is transferred into two pneumo dryers in series.

The material is stored in a 1.5 ton X-ray machine feed bin. The material is then gravity fed into a primary batch weigh ........


Production:

CommodityUnits201920182017201620152014
Diamond carats  ......  Subscription required11,896,00011,857,00011,975,0009,764,00011,312,000
All production numbers are expressed as mineral.
Subscription required - Subscription is required.

Operational Metrics:

Metrics2015
Total tonnes mined 115,841,000 t
Tonnes processed 7,870,000 t

Reserves at December 31, 2018:

CategoryOreTypeTonnage CommodityGradeContained carats
Proven & Probable In-Situ (OP) 131.7 Mt Diamond 1.265 carats/t 166.6 M carats
Measured & Indicated In-Situ (OP) 70.4 Mt Diamond 0.821 carats/t 57.8 M carats
Inferred In-Situ (OP) 72.7 Mt Diamond 0.857 carats/t 62.3 M carats


Heavy Mobile Equipment:

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Apr 2, 2021
....................... Subscription required ....................... Subscription required Subscription required Apr 2, 2021
....................... Subscription required ....................... Subscription required Subscription required Apr 2, 2021
....................... Subscription required ....................... Subscription required Subscription required Apr 2, 2021
Subscription required - Subscription is required.

Staff:

EmployeesContractorsTotal WorkforceYear
Subscription required Subscription required Subscription required 2018
Subscription required Subscription required Subscription required 2015
Subscription required 2012

Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2019
................................... Subscription required 2019
Annual Review 2018
Management Discussion & Analysis 2018
Other 2018
Year-end Mineral Reserves 2018
Annual Report 2017
Year-end Mineral Reserves 2017
Annual Report 2016
Corporate Presentation 2016
Year-end Mineral Reserves 2016
Annual Report 2015
Year-end Mineral Reserves 2015
Corporate Presentation 2012
Other 2008
Other 2003
Subscription required - Subscription is required.

News:

NewsDate
Thiess wins $1.7bn contract at world’s richest diamond mine March 18, 2019

Aerial view:

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