Overview
Stage | Production |
Mine Type | Open Pit |
Commodities |
|
Mining Method |
|
Processing |
- Intensive Cyanidation Reactor (ICR)
- Dense media separation
- Carbon in pulp (CIP)
- Solvent Extraction & Electrowinning
- X-Ray Transmission (XRT) sorting
- Cyanide (reagent)
|
Mine Life | 2042 |
QKR Namibia Mineral Holdings (Pty) Ltd. completed conceptual and prefeasibility studies for the underground mining and expansion of the processing plant. |
Source:
p. 52
Company | Interest | Ownership |
JG Investment Investments (Pty) Ltd.
|
7.5 %
|
Indirect
|
QKR Corporation Ltd.
|
92.5 %
|
Indirect
|
QKR Namibia Mineral Holdings (Pty) Ltd – 92.5%
JG Investment Investments (Pty) Ltd (EpangeloGold) – 7.5%
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.
Summary:
The total mining function, including drilling, blasting, loading, and haulage of ore and waste, is the responsibility of the mining contractor until 2004.
The mining operation has been owner-operated since mid 2004.
Crusher / Mill Type | Model | Size | Power | Quantity |
Stirred mill
|
.......................
|
|
1600 kW
|
1
|
Processing
- Intensive Cyanidation Reactor (ICR)
- Dense media separation
- Carbon in pulp (CIP)
- Solvent Extraction & Electrowinning
- X-Ray Transmission (XRT) sorting
- Cyanide (reagent)
Source:
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.
XRT (X-Ray Transmission) technologies to minimise carbon losses was introduced and proved to be effective at the PreConcentration Plant (PCP).
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.
Production:
Commodity | Units | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 | 2014 |
Gold
|
kg
| ......  | ......  | 1,427 | 1,843 | 1,890 | 1,878 | 1,938 |
All production numbers are expressed as metal in doré.
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Operational Metrics:
Metrics | 2013 |
Tonnes milled
| 1.4 Mt |
Reserves at December 31, 2013:
Category | Tonnage | Commodity | Grade | Contained 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
|
Financials:
| Units | 2020 | 2019 | 2018 | 2017 | 2016 |
After-tax Income
|
M NAD
| ......  | ......  | -185 |
-111.5
|
244.8
|
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Corporate Filings & Presentations:
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Aerial view:
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