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Namibia
Navachab Mine

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 Location:
10 kms SW from Karibib, Namibia

  Address:
Post Office box: 150
Karibib
Namibia
Phone  ...  Subscription required
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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
  • Gold
Mining Method
  • Truck & Shovel / Loader
Processing
  • Dense media separation
  • Carbon in pulp (CIP)
  • Solvent Extraction & Electrowinning
  • Cyanide (reagent)
Mine Life2028
AngloGold Ashanti sold the Navachab mine in July 2014 to a wholly-owned subsidiary of QKR Corporation Limited. Mine production data has not been publicly available since then.


Owners

Source:
CompanyInterestOwnership
QKR Corporation Ltd. 100 % Direct
AngloGold Ashanti sold the Navachab mine in July 2014 to a wholly-owned subsidiary of QKR Corporation Limited.

Deposit Type

  • Vein / narrow vein


Summary:

The Navachab gold deposit is located in the Pan-African Damara Orogen and hosted by greenschist-amphibolite facies calc-silicates, marbles and volcaniclastic rocks. The rocks have been intruded by granite, pegmatite and aplitic dykes and have also been deformed into a series of alternating dome and basin-like structures.

The mineralisation at Navachab forms a sheet-like body which plunges at an angle of approximately 20° to the northwest. The mineralisation is predominantly hosted in a sheeted quartz vein set (approximately 60% of tonnage) and a replacement skarn (approximately 40% of tonnage). The mineralisation in the main pit is hosted by a northeast to southwest striking metamorphosed sequence of calc-silicates, marbles and volcaniclastic rocks that dip at 70° to the west. The gold is very fine-grained and associated with pyrrhotite and minor amounts of pyrite, chalcopyrite, arsenopyrite, sphalerite, maldonite and bismuthinite. An estimated 90% of the gold occurs as free gold and the remainder is present in minerals such as maldonite (Au2Bi). Silver is also present with a gold to silver ratio of approximately 15 to 1.


Mining Methods

  • Truck & Shovel / Loader


Summary:

The total mining function, including drilling, blasting, loading, and haulage of ore and waste, is the responsibility of the mining contractor. The concept of a mining contractor, common in other parts of the world, was adopted because of the unfavourable impact on the viability of the project of the additional front-end capital needed for inhouse mining.


Crushing and Grinding


Processing

  • Dense media separation
  • Carbon in pulp (CIP)
  • Solvent Extraction & Electrowinning
  • Cyanide (reagent)

Source: Subscription required

Summary:

Navachab is mined as an open-pit mine with a CIP plant that has a production capacity of 120,000 tonnes per month (tpm). The plant includes mills, CIP and electro winning facilities. A dense-media separation (DMS) plant with a 200 tonnes per hour (tph) capacity was commissioned during 2010 and a portion of the CIP feed comes from this pre-concentration plant.

In view of the coarse nature of the vein-related gold and the fineness of the disseminated pyrrhotite hosted gold, plane tables were installed below the mill. The entire mill discharge passes over the tables, where a gold concentrate is produced. This concentrate is then passed over an endless belt, where further upgrading occurs. The endless-belt concentrate is leached in an intensive cyanid ation reactor.

Recoveries & Grades:

CommodityParameter20132012
Gold Head Grade, g/t 1.391.59

Production:

CommodityUnits20132012
Gold koz 6374

Operational Metrics:

Metrics2013
Tonnes milled 1.4 Mt

Reserves at December 31, 2013:

CategoryTonnage CommodityGradeContained Metal
Proven & Probable 46.34 Mt Gold 1.29 g/t 1.92 M oz
Total Resource 103.96 Mt Gold 1.17 g/t 3.91 M oz

Commodity Production Costs:

CommodityUnits2013
Total cash costs Gold USD 691 / oz
All-in sustaining costs (AISC) Gold USD 781 / oz

Financials:

Units2013
Capital expenditures M USD 5  


Heavy Mobile Equipment:

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Mar 3, 2020
....................... Subscription required ....................... Subscription required Subscription required Mar 3, 2020
....................... Subscription required ....................... Subscription required Subscription required Mar 3, 2020
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Staff:

Total WorkforceYear
Subscription required 2013
Subscription required 2012

Corporate Filings & Presentations:

DocumentYear
Press Release 2013
Year-end Mineral Reserves 2013
Project Description 1991
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Aerial view:

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