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Papua New Guinea
Simberi Mine (Simberi Sulphide Project)

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 Location:
132 km E from Kavieng, Papua New Guinea

  Address:
Simberi Island, New Ireland Province
PO Box 624
Kavieng
Papua New Guinea
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WebsiteWeb
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Costs & Financials
  • Fleet
  • Personnel
  • Filings & News

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Overview

StageProduction
Mine TypeOpen Pit
Commodities
  • Gold
Mining Method
  • Truck & Shovel / Loader
Production Start...
Mine Life2033
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.


Owners

Source: p. 97
CompanyInterestOwnership
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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Deposit Type

  • Volcanic hosted


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 ........


Mining Methods

  • Truck & Shovel / Loader


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.


Crushing and Grinding
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Processing

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Summary:

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Production:

CommodityUnits2023202220212020201920182017
Gold koz  ......  Subscription required ^  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required135116
All production numbers are expressed as metal in doré. ^ Guidance / Forecast.
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Operational Metrics:

Metrics202220212020201920182017
Total tonnes mined  ......  Subscription required  ......  Subscription required  ......  Subscription required12,345 kt13,610 kt
Ore tonnes mined  ......  Subscription required  ......  Subscription required  ......  Subscription required3,396 kt4,199 kt4,020 kt
Waste  ......  Subscription required  ......  Subscription required  ......  Subscription required
Tonnes milled  ......  Subscription required  ......  Subscription required  ......  Subscription required3,072 kt3,586 kt3,690 kt
Annual processing capacity  ......  Subscription required  ......  Subscription required  ......  Subscription required3.5 Mt3.5 Mt
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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.

CategoryTonnage CommodityGradeContained 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

Commodity Production Costs:

CommodityUnits2023202220212020201920182017
Credits (by-product) Gold AUD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required -4 / oz  
Cash costs Gold AUD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 929 / oz  
Total cash costs Gold AUD  ......  Subscription required†  ......  Subscription required†  ......  Subscription required†  ......  Subscription required† 969 / oz†   1,092 / oz†  
All-in sustaining costs (AISC) Gold AUD  ......  Subscription required ^†  ......  Subscription required†  ......  Subscription required†  ......  Subscription required†  ......  Subscription required† 1,068 / oz†   1,187 / oz†  
^ Guidance / Forecast.
† Net of By-Product.
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Financials:

Units2023202220212020201920182017
Capital expenditures (planned) M AUD  ......  Subscription required
Sustaining costs M AUD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 4.1   3.7  
Growth Capital M AUD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 0.3  
Capital expenditures M AUD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 4.4   3.7  
Revenue M AUD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 217.9   199.8  
Gross profit M AUD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 100.2   75.6  
Pre-tax Income M AUD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 77.8   24  
EBITDA M AUD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 95.3   71.1  
Subscription required - Subscription is required


Pipelines
TypeMaterialDiameterLengthDescription


Heavy Mobile Equipment as of June 30, 2021:
HME TypeModelQuantityLeased or
Contractor
Excavator ....................... Subscription required ....................... Subscription required
Truck (dump) ....................... Subscription required
Truck (dump) ....................... Subscription required
Truck (haul) ....................... Subscription required Leased
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Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Oct 5, 2022
....................... Subscription required ....................... Subscription required Subscription required Oct 5, 2022
....................... Subscription required ....................... Subscription required Subscription required Dec 27, 2022
....................... Subscription required ....................... Subscription required Subscription required Dec 27, 2022
....................... Subscription required ....................... Subscription required Subscription required Oct 5, 2022
Subscription required - Subscription is required.

Staff:

EmployeesContractorsTotal WorkforceYear
Subscription required 2022
Subscription required Subscription required Subscription required 2021
Subscription required Subscription required 2020

Corporate Filings & Presentations:

DocumentYear
Annual Report 2022
Corporate Presentation 2022
Quarterly Report 2022
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
Annual Report 2018
Quarterly Report 2018
Annual Report 2017
Year-end Mineral Reserves 2017
Year-end Mineral Reserves 2016
Year-end Mineral Reserves 2013
Subscription required - Subscription is required.

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