Summary

Mine Type	Open Pit
Status	Closing / Closed
Commodities	Gold Copper
Mining Method	Truck & Shovel / Loader
Production Start	...
Snapshot	Buzwagi mine was an economic powerhouse for Tanzania’s Shinyanga region for nearly 15 years, with the mine officially closing in July 2022. Since then, Barrick has been attending to Buzwagi’s environmental rehabilitation, while also advancing plans to transform the closed mine into a Special Economic Zone, replacing the mine as the region’s economic driver. As of January 2024 Buzwagi rehabilitation is ongoing: - Tailings Storage Facility rehabilitation 90% complete with strict quality assurance/quality control program; - Process plant dismantling is underway; - Environmental monitoring and inspections are ongoing with no material issues raised.

Deposit type

• Vein / narrow vein
• Porphyry

Summary:

Buzwagi is shear-hosted quartz-veined deposit hosted in porphyritic granite. It is found in Nzega belt in the lower portion of the Nyanzian system. This belt is composed of basalt and intermediate volcanic intruded by granitoid masses which is dominated by deep-seated structure.

The granite that hosts the majority (85%) of the Buzwagi deposit is a medium to coarse feldspar granite with zone orthoclase crystals up to 4cm. This is predominantly underlain by medium- to coarse-grained granite intruding mafic flow and pillow flow basalts, within which there are two other distinctive units, including a tonalite silt-like body, which is occasionally mineralised with quartz veining, sericite alteration and sulphide mineralisation. Rock units dip to the east at c 60° in the southern portion of the lease area and 65-75° in the northern portion.

Several faults traverse the Buzwagi area. The most significant orientation of faulting is northwestsouth-east, parallel or sub-parallel to the Nzega shear (and probably related to it).

The Buzwagi deposit is hosted within or near a north-south brittle-fracture shear corridor that is up to 450m wide and includes two ore types: shear-hosted, porphyry-hosted.

As such, Buzwagi has been separated into 12 structural domains, within which mineralisation is segregated.

Domain 1 (which accounts for up to 50% of Buzwagi’s in-situ gold) is up to 1,000m long and 30m wide (subject to pinching and swelling), with a consistent gold grade (averaging 2.69g/t) along its entire strike length. The gold mineralisation in this domain is associated with quartz veins and/or quartz stockwork, reflecting dilatant zones within the north-south structural corridor. By contrast, mineralisation in Domain 6 extends over a wider area than Domain 1 (>30m) and is characterised by more stockwork and less shearing. All other mineralised domains are similar to Domain 6, except that they are generally less than 10m wide. The gold mineralisation in all domains plunges 30° to the south.

Mining Methods

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Comminution

Crushers and Mills

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Processing

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Commodity Production

Commodity	Product	Units	2021	2020	2019	2018	2017	2016	2015
Gold	Metal in doré	koz	....	....	115	145
Gold	Metal in conc./ doré	koz					269	162	171
Copper	Metal in concentrate	k lbs					8,991	9,847	8,672

Operational metrics

Metrics	2021	2020	2019	2018	2017	2016	2015
Tonnes processed	....	....	3,422 kt	4,526 kt	4,256 kt	4,404 kt	4,085 kt
Annual processing capacity	....	....	4.4 Mt			4.4 Mt
Ore tonnes mined	....	....	45 kt	391 kt	9,309 kt	5,317 kt	5,658 kt
Waste	....	....	59 kt
Total tonnes mined	....	....	105 kt	479 kt	15,368 kt	21,585 kt	24,989 kt
Daily processing capacity	....	....		12,000 t	12,000 t	12,000 t
Stripping ratio	....	....				2

Personnel

Job Title	Name	Phone	Profile	Ref. Date
.......................	.......................	...........		Dec 6, 2024