Overview
| Stage | Production |
| Mine Type | Open Pit |
| Commodities |
|
| Mining Method |
|
| Processing |
- Gravity separation
- Flotation
- Concentrate leach
- Carbon in leach (CIL)
- Solvent Extraction & Electrowinning
- Cyanide (reagent)
|
| Mine Life | 2021 |
Buzwagi commenced commercial production in 2009, and the mill is now solely processing stockpiles until mid-2021. |
Source:
p. 59
| Company | Interest | Ownership |
|
Government of Tanzania
|
16 %
|
Indirect
|
|
Barrick Gold Corp.
|
84 %
|
Indirect
|
|
Twiga Minerals Corporation Ltd.
(operator)
|
100 %
|
Direct
|
On September 17, 2019, Barrick acquired all of the Acacia Mining plc. Acacia became a wholly-owned subsidiary of Barrick called Barrick TZ Limited. On January 24, 2020, Barrick announced that the Company had ratified the creation of Twiga Minerals Corporation. The Government of Tanzania will receive a free carried shareholding of 16% in each of the former Acacia mines (Bulyanhulu, Buzwagi and North Mara).
Summary:
The operation previously mined a low grade shear-hosted quartz-veined deposit, hosted in porphyritic granite.
Summary:
The Buzwagi site is located in north-western Tanzania, East Africa. Buzwagi is the second largest mining operation in Tanzania and the largest single open pit in the country, which is one of the fastest emerging gold producers in Africa and the continent’s third-largest gold producer after South Africa and Ghana.
The mining of the open pit will use an owner-operated fleet of three excavators, fifteen 150-tonne haul trucks and three blast hole rigs.
Processing Technologies
- Gravity separation
- Flotation
- Concentrate leach
- Carbon in leach (CIL)
- Solvent Extraction & Electrowinning
- Cyanide (reagent)
Source:
Summary:
The process plant will treat oxide ore by gravity, flotation and carbon-in-leach (CIL) and will produce gold in the form of gold ore and a copper/gold concentrate to be transported for further refining.
The process plant is designed with a throughput capacity of 12,000 tonnes of ore per day (c. 4.4 million tonnes per year) and produces both doré (approximately 45% of production) and a gold/copper concentrate (approximately 55% of production).
Recoveries & Grades:
| Commodity | Parameter | 2019 | 2018 | 2017 | 2016 | 2015 | 2014 | 2013 |
|
Gold
|
Recovery Rate, %
| ......  | ...... | ...... | ...... | ...... | ...... | ...... |
|
Gold
|
Head Grade, g/t
| 0.87 | 1.1 | 2.1 | 1.2 | 1.4 | 1.7 | 1.5 |
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Production:
| Commodity | Product | Units | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|
Gold
|
Metal in doré
|
koz
| ...... ^ | ...... | ...... | | | |
|
Gold
|
Metal in conc./ doré
|
koz
| | | | 269 | 162 | 171 |
|
Copper
|
Metal in concentrate
|
k lbs
| | | | ...... | ...... | ...... |
^ Guidance / Forecast.
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Operational Metrics:
| Metrics | 2019 | 2018 | 2017 | 2016 | 2015 | 2014 |
|
Total tonnes mined
| ...... | ...... | ...... | 21,585 kt | 24,989 kt | 24,510 kt |
|
Ore tonnes mined
| ...... | ...... | ...... | 5,317 kt | 5,658 kt | 4,692 kt |
|
Waste
| ...... | ...... | ...... | | | |
|
Tonnes milled
| ...... | ...... | ...... | 4,404 kt | 4,085 kt | 4,086 kt |
|
Annual processing capacity
| ...... | ...... | ...... | 4.4 Mt | | |
|
Daily processing capacity
| ...... | ...... | ...... | 12,000 t | | |
|
Stripping / waste ratio
| ...... | ...... | ...... | 2 | | |
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Reserves at December 31, 2019:
The Numbers in the Annual Report 2019 are given on 84% basis.
| Category | OreType | Tonnage | Commodity | Grade | Contained Metal |
|
Probable
|
In-Situ (OP)
|
6.07 Mt
|
Gold
|
0.84 g/t
|
0.166 M oz
|
|
Indicated
|
In-Situ (OP)
|
9.404 Mt
|
Gold
|
0.99 g/t
|
0.2976 M oz
|
|
Inferred
|
In-Situ (OP)
|
23.81 Mt
|
Gold
|
0.9 g/t
|
0.67 M oz
|
Corporate Filings & Presentations:
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Aerial view:
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