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 | 3 years (as of Jan 1, 2017) |
In 2018 the mine is moving to a stockpile processing operation. |
Source:
p. 25
Barrick holds a 63.9% equity interest in Acacia Mining plc, a company listed on the London Stock Exchange (“LSE”) that owns gold mines and exploration properties in Africa.
Acacia’s subsidiary, Pangea Minerals Ltd. (“PML”) is the owner of the Buzwagi mine.
Summary:
The Buzwagi gold mine lies in a fleece-hosted quartz veined deposit which comprises of 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)
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 | 2017 | 2016 | 2015 | 2014 | 2013 |
|
Gold
|
Recovery Rate, %
| 94.3 | 94.5 | 94.1 | 92.4 | 88.2 |
|
Gold
|
Head Grade, g/t
| ......  | ...... | ...... | ...... | ...... |
- Subscription is required.
Production:
| Commodity | Product | Units | 2017 | 2016 | 2015 | 2014 | 2013 |
|
Gold
|
Metal in conc./ Doré
|
oz
| ...... | ...... | 171,172 | 210,063 | 181,984 |
|
Copper
|
Metal in concentrate
|
k lbs
| ...... | ...... | ...... | ...... | ...... |
- Subscription is required.
Operational Metrics:
| Metrics | 2017 | 2016 | 2015 | 2014 | 2013 |
|
Total tonnes mined
| ...... | 21,585 kt | 24,989 kt | 24,510 kt | 32,177 kt |
|
Ore tonnes mined
| ...... | 5,317 kt | 5,658 kt | 4,692 kt | 3,753 kt |
|
Tonnes milled
| ...... | 4,404 kt | 4,085 kt | 4,086 kt | 4,400 kt |
|
Stripping / waste ratio
| ...... | 2 | | | |
|
Daily processing capacity
| ...... | 12,000 t | | | |
|
Annual processing capacity
| ...... | 4.4 Mt | | | |
- Subscription is required.
Reserves at December 31, 2017:
| Category | OreType | Tonnage | Commodity | Grade | Contained Metal |
|
Proven
|
Stockpiles
|
14,121,585 t
|
Gold
|
0.91 g/t
|
413,944 oz
|
|
Proven
|
In-Situ (OP)
|
132,165 t
|
Gold
|
1.71 g/t
|
7,258 oz
|
|
Measured
|
In-Situ (OP)
|
20,453 t
|
Gold
|
2.98 g/t
|
1,958 oz
|
|
Measured
|
In-Situ (OP)
|
20,453 t
|
Copper
|
0.33 %
|
150,562 lbs
|
|
Indicated
|
In-Situ (OP)
|
4,504,014 t
|
Gold
|
1.04 g/t
|
150,020 oz
|
|
Indicated
|
In-Situ (OP)
|
4,504,014 t
|
Copper
|
0.11 %
|
10,820,263 lbs
|
|
Measured & Indicated
|
In-Situ (OP)
|
4,524,467 t
|
Gold
|
1.04 g/t
|
151,978 oz
|
|
Measured & Indicated
|
In-Situ (OP)
|
4,524,467 t
|
Copper
|
0.11 %
|
10,970,825 lbs
|