Overview
Stage | Permitting |
Mine Type | Open Pit |
Commodities |
|
Mining Method |
|
Mine Life | 9 years (as of Jan 1, 2021) |
The environmental permit for the Simberi Sulphide project was received by the Conservation & Environmental Protection Authority of Papua New Guinea on 1 August 2022. This expansion will extend the operating life of the mine by more than ten years. |
Source:
p. 35
Company | Interest | Ownership |
St Barbara Ltd.
|
100 %
|
Indirect
|
Simberi Gold Co, Ltd.
(operator)
|
100 %
|
Direct
|
Contractors
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Summary:
The Simberi Gold Project is located on Simberi Island in the Tabar Islands Group situated in the New Ireland Province of Papua New Guinea (PNG), approximately 80 km north-west of Lihir Island. Simberi is the oldest and northernmost island of the Tabar Group. It measures approximately 10 km east-west, 8 km north-south and rises to over 300 m above sea level. The currently known gold prospects (Sorowar, Pigiput, Pigibo, Botlu, Pigicow, Samat, Bekou and Monun Creek) on Simberi Island are located in the eastern half of the island within the central volcanic core. They are contained within a sub-cropping epithermal alteration system and structural corridor extending 4km north-south and 2km east-west. The host rocks for the mineralisation comprise Pliocene altered alkaline lava flows or intrusives (porphyries), volcaniclastics and tuffs.
Of the eight separate deposits, Pigiput in the south is by far the largest gold resource. Monun Creek is located immediately to the north-east of Pigiput, with Sorowar, the second largest resource, further north again. Pigibo, Botlu, Samat and Bekou lie to the west and south of Pigiput, and while relatively small, are relatively higher grade. All deposits lie within 2 to 3km of each other. Sorowar, Pigiput and Botlu are currently being mined via open pit methods.
Fine grained free gold in oxide material is the target of current operations. Within the sulphide zone gold is also fine grained (most grains are under 15 µm in diam ........

Summary:
The mining method for all deposits is open pit, using 5 m flitches and 20 m benches.
The oxide operation is expected to maintain the current production level during the expansion of the mining fleet and construction of the sulphide plant.
Source:
Summary:

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Projected Production:
Commodity | Product | Units | Avg. Annual | LOM |
Gold
|
Concentrate
|
kt
| | 1,500 |
Gold
|
Metal in concentrate
|
koz
| 160 | |
Operational Metrics:
Metrics | |
Stripping / waste ratio
| ......  |
Waste tonnes, LOM
| ......  |
Ore tonnes mined, LOM
| ......  |
Total tonnes mined, LOM
| ......  |
Plant annual capacity
| ......  |
Mining scale, tpd
| ......  |
* According to 2021 study.
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Reserves at December 31, 2021:
Mineral Resources cut-off grade - 0.6 g/t Au.
Category | OreType | Tonnage | Commodity | Grade | Contained Metal |
Proven
|
Sulphide
|
2,530 kt
|
Gold
|
1.8 g/t
|
143 koz
|
Probable
|
Sulphide
|
24,808 kt
|
Gold
|
2 g/t
|
1,582 koz
|
Proven & Probable
|
Sulphide
|
27,338 kt
|
Gold
|
2 g/t
|
1,726 koz
|
Measured
|
Sulphide
|
4,000 kt
|
Gold
|
1.6 g/t
|
191 koz
|
Indicated
|
Sulphide
|
47,500 kt
|
Gold
|
1.5 g/t
|
2,452 koz
|
Inferred
|
Sulphide
|
19,900 kt
|
Gold
|
1.6 g/t
|
932 koz
|
Total Resource
|
Sulphide
|
71,400 kt
|
Gold
|
1.6 g/t
|
3,575 koz
|
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