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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
Phone  ...  Subscription required
Fax+ 675-321-4705
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  • Overview
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  • Mining
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  • Production
  • Reserves
  • Costs & Financials
  • Fleet
  • Personnel
  • Filings & News

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Overview

StageProduction
Mine TypeOpen Pit
Commodities
  • Gold
  • Silver
Mining Method
  • Truck & Shovel / Loader
Production Start...
Mine Life20 years (as of Jan 1, 2022)
Lihir is one of the world’s largest producing gold mines.

In October 2021, the Newcrest Board approved the Lihir Phase 14A. Newcrest continued to progress the Phase 14A Feasibility Study during FY22 with ground support, drainage works and shotcrete works completed, and the procurement of mobile fleet equipment, specialised civil engineering equipment and materials. First medium grade ore was delivered to the mill during the FY22 period.

The findings of the Feasibility Study are expected to be released in the December 2022 quarter.
Latest NewsNewcrest Announces Lihir Phase 14A Feasibility Study Unlocks Value     January 24, 2023


Owners

Source: p. 17,171
CompanyInterestOwnershipInvestor's Info
Newcrest Mining Ltd. 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).

Contractors

Subscription required - Subscription is required.


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. Mining is by conventional open pit methods.

Production mining is conducted by Newcrest using Owner-operated equipment fleet and an Owner workforce. A separate mining contractor operation using a smaller pioneering fleet is used to develop new working areas on the steep caldera slopes.

Production mining is by conventional open pit method, using a fleet of 500 t class (operating weight) hydraulic face shovels loading into 135 t capacity rear-dump haul trucks, with a recently demonstrated mining rate of 33 Mt/a ex-pit. Ore and waste are drilled and blasted on 12 m benches and mined in a single pass. Where practicable, walls are drilled with a pre-split to assure stable wall rock conditions. The ground is frequently too hot for conventional explosives, requiring high-temperature blasting products and specialised blasting procedures for mining in hot ground.

A majority of ex-pit ore is allocated by gold and sulphur grade into a blend plan agreed with process plant staff along with existing stockpiled ore. Mill feed is based on the blend plan and can be comprised of reclaimed ore from the ROM stockpiles, direct ex-pit ore and existing stockpile ore.

Waste rock ........


Crushing and Grinding
Source: Subscription required

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Processing

Flow Sheet: Subscription required

Summary:

- subscription is required.


Production:

CommodityUnits2022202120202019201820172016
Gold koz  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required955940900
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. ^ Guidance / Forecast.
Subscription required - Subscription is required.

Operational Metrics:

Metrics202220212020201920182017
Total tonnes mined  ......  Subscription required  ......  Subscription required  ......  Subscription required31,057 kt33,234 kt30,069 kt
Ore tonnes mined  ......  Subscription required  ......  Subscription required  ......  Subscription required14,775 kt11,273 kt13,389 kt
Waste  ......  Subscription required  ......  Subscription required  ......  Subscription required16,282 kt21,962 kt16,680 kt
Tonnes milled  ......  Subscription required  ......  Subscription required  ......  Subscription required13,350 kt14,274 kt13,001 kt
Plant annual capacity  ......  Subscription required  ......  Subscription required  ......  Subscription required
Subscription required - Subscription is required.

Reserves at June 30, 2022:
Mineral Resource and Ore Reserve Cut-Off Criteria: Lihir Open Pit and Stockpiles 1.00g/t gold.

CategoryOreTypeTonnage CommodityGradeContained Metal
Proven Stockpiles 58 M dmt Gold 1.9 g/t
Probable Stockpiles 14 M dmt Gold 1.5 g/t
Probable In-Situ (OP) 230 M dmt Gold 2.4 g/t 18 M oz
Proven & Probable Stockpiles 72 M dmt Gold 1.8 g/t 4.2 M oz
Measured Stockpiles 58 M dmt Gold 1.9 g/t
Indicated Stockpiles 14 M dmt Gold 1.5 g/t
Indicated In-Situ (OP) 510 M dmt Gold 2.3 g/t 37 M oz
Measured & Indicated Stockpiles 72 M dmt Gold 1.8 g/t 4.2 M oz
Inferred In-Situ (OP) 67 M dmt Gold 2.3 g/t 4.9 M oz

Commodity Production Costs:

CommodityUnits2022202120202019201820172016
Credits (by-product) Gold USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required -1 / oz  
Total cash costs Gold USD  ......  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† 934 / oz†   858 / oz†   830 / oz†  
All-in costs Gold USD  ......  Subscription required†  ......  Subscription required†  ......  Subscription required†  ......  Subscription required† 986 / oz†  
† Net of By-Product.
Subscription required - Subscription is required.

Financials:

Units2023202220212020201920182017
Capital expenditures (planned) M USD  ......  Subscription required
Sustaining costs M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 102   114  
Capital expenditures M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 245   217  
Revenue M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 1,207   1,181  
EBIT M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 261   283  
EBITDA M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 538   542  
Operating Cash Flow M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 557   571  
Subscription required - Subscription is required



Heavy Mobile Equipment as of June 30, 2020:
HME TypeModelSizeQuantity
Dozer (crawler) ....................... Subscription required 430 kW ....................... Subscription required
Dozer (rubber tire) ....................... Subscription required ....................... Subscription required
Drill ....................... Subscription required ....................... Subscription required
Drill ....................... Subscription required ....................... Subscription required
Drill ....................... Subscription required ....................... Subscription required
Excavator ....................... Subscription required 85 t ....................... Subscription required
Excavator ....................... Subscription required ....................... Subscription required
Excavator ....................... Subscription required ....................... Subscription required
Excavator ....................... Subscription required ....................... Subscription required
Grader ....................... Subscription required 220 kW ....................... Subscription required
Loader (FEL) ....................... Subscription required ....................... Subscription required
Loader (FEL) ....................... Subscription required ....................... Subscription required
Loader (FEL) ....................... Subscription required 600 kW ....................... Subscription required
Shovel (hydraulic) ....................... Subscription required 500 t ....................... Subscription required
Truck (haul) ....................... Subscription required 135 t ....................... Subscription required
Truck (service) ....................... Subscription required ....................... Subscription required
Truck (water) ....................... Subscription required 90 t ....................... Subscription required
Subscription required - Subscription is required.

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Oct 24, 2022
....................... Subscription required ....................... Subscription required Subscription required Oct 24, 2022
....................... Subscription required ....................... Subscription required Subscription required Oct 24, 2022
....................... Subscription required ....................... Subscription required Subscription required Oct 24, 2022
....................... Subscription required ....................... Subscription required Subscription required Oct 24, 2022
Subscription required - Subscription is required.

Staff:

EmployeesContractorsTotal WorkforceYear
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 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
Subscription required - Subscription is required.

News:

NewsDate
Newcrest Announces Lihir Phase 14A Feasibility Study Unlocks Value January 24, 2023

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