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Papua New Guinea
Porgera Mine

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 Location:
629 km NW from Port Moresby, Papua New Guinea

  Address:
PO Box 484
Mount Hagen, WHP
Papua New Guinea
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Fax+675-547-8132
WebsiteWeb
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Costs & Financials
  • Fleet
  • Personnel
  • Filings & News

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Overview

StatusCare and Maintenance
Mine TypeOpen Pit & Underground
Commodities
  • Gold
Mining Method
  • Truck & Shovel / Loader
  • Longhole stoping
  • Paste backfill
Production Start...
Mine Life2023
Porgera has been on care and maintenance since April 2020 when the government declined to renew its special mining lease.

On February 3, 2022, the Framework Agreement (signed April 9, 2021) was replaced by the more detailed Porgera Project Commencement Agreement (the “Commencement Agreement”).

The provisions of the Commencement Agreement will be implemented, and work to recommence full mine operations at Porgera will begin, following the execution of a number of definitive agreements and satisfaction of a number of conditions. On April 7, 2022, one such definitive agreement, the Shareholders' Agreement for the new Porgera joint venture company was signed by BNL’s affiliate, Porgera (Jersey) Limited, and the state-owned Kumul Minerals (Porgera) Limited, and is awaiting signature by MRE to take effect. This would clear the way for the incorporation of a new Porgera joint venture company and the application for a new Special Mining Lease, a condition of the Porgera mine's reopening.


Owners

Source: p. 35,84
CompanyInterestOwnership
Barrick Gold Corp. 47.5 % Indirect
Zijin Mining Group Co., Ltd 47.5 % Indirect
Barrick (Niugini) Ltd. (operator) 95 % Indirect
On April 7, 2022, the Shareholders’ Agreement for the new Porgera joint venture company was signed by Porgera (Jersey) Limited, which is an affiliate of Barrick Niugini Limited (“BNL”), and the state-owned Kumul Minerals (Porgera) Limited. The Shareholders’ Agreement will become effective following signature by Mineral Resources Enga Limited (“MRE”), the holder of the remaining 5% of the original Porgera joint venture not owned by BNL, which will allow for the incorporation of a new Porgera joint venture company and application by this entity for a new Special Mining Lease, a condition of the reopening of the Porgera mine under the Commencement Agreement.

BNL is jointly owned on a 50/50 basis by Barrick and Zijin Mining Group. Accordingly, following the implementation of the Commencement Agreement, Barrick’s current 47.5% interest in the Porgera mine is expected to be reduced to a 24.5% interest. BNL will retain operatorship of the mine.

Contractors

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Deposit Type

  • Breccia pipe / Stockwork
  • Epithermal
  • Vein / narrow vein


Summary:

Porgera Mine is an epithermal vein-type gold-silver deposit but it shares many characteristics with porphyry copper deposits. Remnant heat from the intrusive rocks drove the boiling and upward migration of hydrothermal fluids and resulted in the emplacement of mineralization. The movement of these fluids was controlled by permeability of the rock mass, which developed in and around faults and tectonic zones of dilatancy. As such, the mineralization tends to occur in tabular bodies and breccia zones, the geometry of which is strongly influenced by the orientation of fault structures and subsidiary fractures. Deposition of ore minerals in epithermal systems is also dependent upon temperature and hydrostatic pressure. These conditions are generally closely related to elevation, with reduction of both temperature and pressure as the fluids migrate upwards.


Mining Methods

  • Truck & Shovel / Loader
  • Longhole stoping
  • Paste backfill


Summary:

The Porgera Joint Venture is an open pit and underground gold mine located at an altitude of 2,200- 2,600 meters in the Enga Province of Papua New Guinea.

The Open Pit mine is 500 meter deep, below the highest point of surface topography and approximately 30 million tonnes (t) of ore per year is excavated. The material mined is a combination of gold bearing ore and barren waste.

Pit dimensions: 2.0km long x 1.2km wide x 400m deep.

Mining in the open pit is undertaken on 10 meter high benches. When the material is too hard to be free dug, the rock is drilled and blasted with a range of drill patterns to suit the litholog.

The Open Pit is a conventional truck and shovel operation and is serviced by a large modern mining fleet of 175t and 90t haul trucks, loaded by 200t and 120t shovels and excavators. There are also smaller 40t and 35t excavators for ancillary work.

The Porgera Underground Mine is a modern, trackless mine, producing approximately 1.4 million tonnes of ore per year from three primary production areas: North Zone, East Zone and AHD.

The underground (UG) operation mines the lodes at depth currently up 330 meter beneath the current pit floor. The Underground operation has a strike extent of approximately 1.6 kilometer (km). The primary access is via a twin decline system from surface with secondary internal accesses connecting the various mining areas.

Mining is done by convention long ho ........


Crushing and Grinding
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Processing

Flow Sheet: Subscription required

Summary:

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Production:
On April 25, 2020, Porgera was placed on care and maintenance after the Government of Papua New Guinea communicated on April 24, 2020 that the Special Mining Lease would not be extended.

CommodityUnits2020201920182017201620152014
Gold koz  ......  Subscription required  ......  Subscription required430495493554519
All production numbers are expressed as metal in conc./ doré.
Subscription required - Subscription is required.

Operational Metrics:

Metrics202020192018201720162015
Total tonnes mined  ......  Subscription required27,697 kt20,762 kt24,219 kt16,924 kt22,139 kt
Ore tonnes mined  ......  Subscription required5,789 kt
Waste  ......  Subscription required21,907 kt17,956 kt20,867 kt
Stripping / waste ratio  ......  Subscription required5.7 15 12.9
Tonnes processed  ......  Subscription required5,558 kt4,501 kt5,891 kt5,705 kt6,323 kt
Daily milling capacity  ......  Subscription required16,100 kt15,600 t15,200 t
Daily mining rate  ......  Subscription required45.9 kt62.1 kt
Subscription required - Subscription is required.

Reserves at December 31, 2021:

CategoryTonnage CommodityGradeContained Metal
Proven 2.4 Mt Gold 6.79 g/t 0.5 M oz
Probable 30.2 Mt Gold 4.59 g/t 4.49 M oz
Proven & Probable 32.6 Mt Gold 4.75 g/t 4.9 M oz
Measured 2.6 Mt Gold 6.66 g/t 0.57 M oz
Indicated 57.1 Mt Gold 4.09 g/t 7.76 M oz
Measured & Indicated 59.7 Mt Gold 4.25 g/t 8.16 M oz
Inferred 21.6 Mt Gold 3.5 g/t 2.41 M oz

Commodity Production Costs:

CommodityUnits202020192018201720162015
Cash costs Gold USD 810 / oz   791 / oz   697 / oz   794 / oz  
Cash costs Gold USD 796 / oz†   781 / oz†   689 / oz†   791 / oz†  
Total cash costs Gold USD  ......  Subscription required  ......  Subscription required
Total cash costs Gold USD  ......  Subscription required†  ......  Subscription required† 828 / oz†   878 / oz†  
All-in sustaining costs (AISC) Gold USD  ......  Subscription required  ......  Subscription required 1,097 / oz   1,003 / oz   866 / oz   1,021 / oz  
All-in sustaining costs (AISC) Gold USD  ......  Subscription required†  ......  Subscription required† 1,083 / oz†   993 / oz†   858 / oz†   1,018 / oz†  
All-in costs Gold USD  ......  Subscription required  ......  Subscription required 1,097 / oz   1,003 / oz   866 / oz   1,021 / oz  
All-in costs Gold USD  ......  Subscription required†  ......  Subscription required† 1,083 / oz†   993 / oz†   858 / oz†   1,018 / oz†  
† Net of By-Product.
Subscription required - Subscription is required.

Operating Costs:

Units202020192018201720162015
OP mining costs ($/t mined) USD 4.183.64.034.535.514.66
UG mining costs ($/t mined) USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Processing costs ($/t milled) USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
G&A ($/t milled) USD  ......  Subscription required  ......  Subscription required
Subscription required - Subscription is required.

Financials:

Units20202019201820172016
Capital expenditures M USD  ......  Subscription required  ......  Subscription required 131   116   86  
Sustaining costs M USD  ......  Subscription required  ......  Subscription required 131   116   86  
Revenue M USD  ......  Subscription required  ......  Subscription required
Operating Income M USD  ......  Subscription required  ......  Subscription required
EBIT M USD
EBITDA M USD  ......  Subscription required  ......  Subscription required



Heavy Mobile Equipment as of February 22, 2018:
HME TypeModelQuantity
Excavator ....................... Subscription required ....................... Subscription required
Loader ....................... Subscription required ....................... Subscription required
Loader ....................... Subscription required ....................... Subscription required
Shovel ....................... Subscription required ....................... Subscription required
Truck (haul) ....................... Subscription required ....................... Subscription required
Truck (haul) ....................... Subscription required ....................... Subscription required
Truck (underground) ....................... Subscription required ....................... Subscription required
Truck (underground) ....................... Subscription required ....................... Subscription required
Truck (underground) ....................... Subscription required ....................... Subscription required
Subscription required - Subscription is required.

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Jul 31, 2022
....................... Subscription required ....................... Subscription required Subscription required Jul 31, 2022
....................... Subscription required ....................... Subscription required Subscription required Jul 31, 2022
Subscription required - Subscription is required.


Corporate Filings & Presentations:

DocumentYear
Quarterly Report 2022
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
Corporate Presentation 2018
Other 2018
Quarterly Report 2018
Operations & Technical Update 2017
Other 2017
Press Release 2017
Management Discussion & Analysis 2016
Other 2016
Other 2016
Annual Report 2014
Other 2013
Technical Report 2012
Subscription required - Subscription is required.

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