Overview
Stage | Production |
Mine Type | Open Pit |
Commodities |
|
Mining Method |
|
Production Start | ...  |
Mine Life | 2033 |
Simberi Operations, the highlight was the safe and successful replacement of the deep sea tailings pipeline. This saw Simberi return to operations in January 2022.
The strategic review of Simberi Operations is underway, and this is an important step in realising a future for Simberi where the Sulphide Expansion project can be delivered, thus adding more than ten years to Simberi’s mine life. |
Source:
p. 97
Company | Interest | Ownership |
St Barbara Ltd.
|
100 %
|
Indirect
|
Simberi Gold Co, Ltd.
(operator)
|
100 %
|
Direct
|
The Simberi Gold Project is 100% owned by the Simberi Gold Company Limited (SGCL), a wholly owned subsidiary of St Barbara Limited.
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:
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.
The mining method for all deposits is open pit, using 5 m flitches and 20 m benches. The principal pieces of digging equipment are four Hitachi 1200 excavators, matched with a mixed fleet of CAT 740 and BELL 50D articulated dump trucks.
All material within the marked out block, regardless of oxidation state, is delivered to ROM stockpiles, either at the Sorowar Feeder, for the rope conveyor, or to the Mill. The 365 tph rope conveyor from the Sorowar Feeder to the Mill ROM pad is an integral part of the mining process flow at Simberi; as is the downhill trucking that HBS conducts using Astra haul trucks to bring an additional 700 kt to 1 Mt per annum to the Mill ROM.
Source:

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Source:
Summary:

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Reserves at December 31, 2021:
Ore Reserves Cut-off Grades: Simberi Oxide - 0.4 g/t Au.
Mineral Resources Cut-off Grades: Simberi Oxide - 0.4 g/t Au, Simberi Transitional and Sulphide - 0.6 g/t Au.
Category | Tonnage | Commodity | Grade | Contained Metal |
Proven & Probable
|
36,704 kt
|
Gold
|
1.8 g/t
|
2,080 koz
|
Measured
|
7,600 kt
|
Gold
|
1.3 g/t
|
329 koz
|
Indicated
|
57,300 kt
|
Gold
|
1.5 g/t
|
2,887 koz
|
Inferred
|
25,100 kt
|
Gold
|
1.4 g/t
|
1,109 koz
|
Total Resource
|
90,000 kt
|
Gold
|
1.5 g/t
|
4,225 koz
|
Type | Material | Diameter | Length | Description |
Corporate Filings & Presentations:
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