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Papua New Guinea
Lihir Mine

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 Location:
900 km NE from Port Moresby, Papua New Guinea

  Regional Office:
Newcrest House, Level 4, Hunter Street
PO Box 789
Port Moresby
Papua New Guinea
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Fax+ 675-321-4705
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  • Overview
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  • Mining
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  • Production
  • Reserves
  • Costs & Financials
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  • Filings & News

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Overview

StageProduction
Mine TypeOpen Pit
Commodities
  • Gold
  • Silver
Mining Method
  • Truck & Shovel / Loader
Production Start...
Mine Life2045
Lihir is one of the world’s largest producing gold mines.

In January 2023, the Newcrest Board approved the Lihir Phase 14A Feasibility Study, endorsing the project into full implementation. Phase 14A is another step forward in realising the full potential of Lihir with the cutback expected to deliver additional high grade gold production over the next four years. Lihir is on track to deliver high grade ore from Phase 14A in FY24.


Owners

Source: p. 32
CompanyInterestOwnershipInvestor's Info
Newmont Corp. 100 % Indirect
Lihir Gold Ltd. (operator) 100 % Direct
The Lihir Project is 100% owned by Newcrest’s wholly-owned subsidiary, Lihir Gold Limited (Lihir Gold).

On November 6, 2023, Newmont Corporation completed the acquisition of Newcrest Mining Limited to create the world’s leading gold company with robust copper production.

Contractors

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Deposit Type

  • Epithermal
  • Breccia pipe / Stockwork


Summary:

The Lihir deposit is considered to be an example of an epithermal gold deposit.

Features of the Lihir deposit that classifies it as an alkalic epithermal gold deposit include:
-Island arc association;
-Hosted in a sector-collapse amphitheatre developed in oxidised alkaline igneous rocks;
-Mineralisation hosted in vein stockworks, disseminated zones and breccias;
-Gold association with pyrite; often refractory;
-Low temperature/low salinity fluids.

Intense alteration was intimately associated with ore-forming events. Early-stage potassic alteration occurred as porphyry-style alteration associated with the emplacement of alkalic stocks within the volcanic edifice, with peripheral and broadly contemporaneous propylitic alteration. Sudden collapse of the volcanic edifice is interpreted to have resulted in the rapid depressurising of the system and subsequent telescoping of epithermal alteration and associated gold mineralisation upon the porphyry environment. Argillic and advanced argillic alteration assemblages developed through continued geothermal activity, driven by post mineralisation magmatism. Geothermal activity continues to this day.

Three alteration styles are recognised:
-Clay zone: equates to argillic ± advanced argillic alteration, about 250 m thick, and subparallel to basal topography of amphitheatre; represents the modern geothermal system;
-Sulphide–adularia zone: equates to epithermal-style low s ........


Mining Methods

  • Truck & Shovel / Loader


Summary:

The Lihir Gold Mine is located on Niolam Island, 900 kilometres north-east of Port Moresby in the New Ireland Province of Papua New Guinea (PNG). The Lihir Gold Mine consists of three linked open pits, Minifie, Lienetz and Kapit, that will be mined over the life of the project.

Historically, mining has focussed on the Minifie and Leinetz zones. The Minifie zone has been largely depleted (with remaining low grade areas deferred towards the end of the mine plan sequence) and mining at the Leinetz zone is nearing completion. Ore in these areas was generally variable in grades and comprised higher amounts of waste rock (including the top layer clay-like material). Existing surface stockpiles supplement mill feed.

Ore is mined by conventional truck and shovel open pit mining methods. Ore and waste are drilled and blasted on 12m benches and mined in a single pass.

The primary mining fleet comprises 500 t class shovels and Caterpillar 785 (135 t) trucks. Newcrest is an owner operator. Final walls are pre-split to provide safe stable walls.

Current operation is mining approximately 42 Mtpa, an improvement from 38 Mtpa in FY22.

The majority of ex-pit ore is transported to the processing facility and allocated by gold and sulphur grade based on the blending strategy. Lower grade ore is typically allocated to long-term stockpiles for future processing (an average of approximately 30% of ore mined is stockpiled).

Ne ........


Crushing and Grinding
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Processing

Flow Sheet: Subscription required

Summary:

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Production:

CommodityUnits2023202220212020201920182017
Gold oz  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required955,156940,060
Silver koz  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
All production numbers are expressed as metal in doré.
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Operational Metrics:

Metrics202320222021202020192018
Ore tonnes mined  ......  Subscription required  ......  Subscription required  ......  Subscription required12,030 kt14,775 kt11,273 kt
Waste  ......  Subscription required  ......  Subscription required  ......  Subscription required18,055 kt16,282 kt21,962 kt
Total tonnes mined  ......  Subscription required  ......  Subscription required  ......  Subscription required30,085 kt31,057 kt33,234 kt
Tonnes milled  ......  Subscription required  ......  Subscription required  ......  Subscription required13,798 kt13,350 kt14,274 kt
Plant annual capacity  ......  Subscription required  ......  Subscription required  ......  Subscription required15 Mt
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Reserves at June 30, 2023:
Mineral Resources and Ore Reserves Cut-Off Criteria: Lihir Open Pit and Stockpiles 1.00g/t gold.

CategoryOreTypeTonnage CommodityGradeContained Metal
Proven Stockpiles 57 M dmt Gold 1.9 g/t
Probable Stockpiles 26 M dmt Gold 1.3 g/t
Probable In-Situ (OP) 220 M dmt Gold 2.5 g/t 18 M oz
Proven & Probable Stockpiles 83 M dmt Gold 1.7 g/t 4.5 M oz
Proven & Probable In-Situ (OP) 220 M dmt Gold 2.5 g/t 18 M oz
Measured Stockpiles 57 M dmt Gold 1.9 g/t
Indicated Stockpiles 21 M dmt Gold 1.4 g/t
Indicated In-Situ (OP) 490 M dmt Gold 2.3 g/t 36 M oz
Measured & Indicated Stockpiles 78 M dmt Gold 1.7 g/t 4.4 M oz
Measured & Indicated In-Situ (OP) 490 M dmt Gold 2.3 g/t 36 M oz
Inferred In-Situ (OP) 66 M dmt Gold 2.3 g/t 4.9 M oz

Commodity Production Costs:

CommodityUnits2023202220212020201920182017
Credits (by-product) Gold USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required -1 / oz  
Total cash costs Gold USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 713 / oz†  
All-in sustaining costs (sold) Gold USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 934 / oz†   858 / oz†  
All-in costs Gold USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 986 / oz†  
† Net of By-Product.
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Operating Costs:

Units20222021
OP mining costs ($/t mined) USD 6.14  5.6  
Processing costs ($/t milled) USD  ......  Subscription required  ......  Subscription required
G&A ($/t milled) USD  ......  Subscription required  ......  Subscription required
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Financials:

Units2023202220212020201920182017
Sustaining costs M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 102   114  
Capital expenditures M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 245   217  
Revenue M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 1,207   1,181  
EBIT M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 261   283  
EBITDA M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 538   542  
Operating Cash Flow M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 557   571  
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Pipelines and Water Supply
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Heavy Mobile Equipment:
HME TypeModelSizeQuantityRef. Date
Dozer (crawler) ....................... Subscription required 430 kW ....................... Subscription required Jun 30, 2020
Dozer (rubber tire) ....................... Subscription required ....................... Subscription required Jun 30, 2020
Drill ....................... Subscription required ....................... Subscription required Jun 30, 2020
Drill ....................... Subscription required ....................... Subscription required Jun 30, 2020
Drill ....................... Subscription required ....................... Subscription required Jun 30, 2020
Excavator ....................... Subscription required 85 t ....................... Subscription required Jun 30, 2020
Excavator ....................... Subscription required ....................... Subscription required Jun 30, 2020
Excavator ....................... Subscription required 250 t ....................... Subscription required Jun 30, 2023
Excavator ....................... Subscription required 120 t ....................... Subscription required Jun 30, 2023
Grader ....................... Subscription required 220 kW ....................... Subscription required Jun 30, 2023
Loader (FEL) ....................... Subscription required ....................... Subscription required Jun 30, 2020
Loader (FEL) ....................... Subscription required ....................... Subscription required Jun 30, 2020
Loader (FEL) ....................... Subscription required 600 kW ....................... Subscription required Jun 30, 2020
Shovel (hydraulic) ....................... Subscription required 500 t ....................... Subscription required Jun 30, 2020
Truck (haul) ....................... Subscription required 135 t ....................... Subscription required Jun 30, 2023
Truck (service) ....................... Subscription required ....................... Subscription required Jun 30, 2020
Truck (water) ....................... Subscription required 90 t ....................... Subscription required Jun 30, 2023
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Mine Management:

Job TitleNamePhoneProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Oct 22, 2023
....................... Subscription required ....................... Subscription required Subscription required Oct 22, 2023
....................... Subscription required ....................... Subscription required Subscription required Oct 22, 2023
....................... Subscription required ....................... Subscription required Subscription required Oct 22, 2023
....................... Subscription required ....................... Subscription required Subscription required Oct 22, 2023
....................... Subscription required ....................... Subscription required ....................... Subscription required Subscription required Oct 23, 2023
....................... Subscription required ....................... Subscription required Subscription required Oct 22, 2023
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Staff:

EmployeesContractorsTotal WorkforceYear
Subscription required Subscription required Subscription required 2023
Subscription required Subscription required Subscription required 2022
Subscription required Subscription required Subscription required 2021
Subscription required Subscription required Subscription required 2020
Subscription required Subscription required Subscription required 2019
Subscription required Subscription required Subscription required 2018
Subscription required Subscription required 2017
Subscription required Subscription required 2016

Corporate Filings & Presentations:

DocumentYear
Annual Report 2023
Annual Result 2023
Corporate Presentation 2023
Financial Review 2023
Other 2023
Other 2023
Quarterly Report 2023
Sustainability Report 2023
Year-end Mineral Reserves 2023
Annual Report 2022
Financial Review 2022
Quarterly Report 2022
Sustainability Report 2022
Year-end Mineral Reserves 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 2020
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
Annual Report 2018
Corporate Presentation 2018
Quarterly Report 2018
Sustainability Report 2018
Year-end Mineral Reserves 2018
Annual Report 2017
Corporate Presentation 2017
Year-end Mineral Reserves 2017
Annual Report 2016
Corporate Presentation 2016
Year-end Mineral Reserves 2016
Fact Sheet 2015
Technical Report 2013
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