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Australia
Cadia PC1-2 Expansion Project (Cadia Valley Operation)

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 Location:
22 km SW from Orange, New South Wales, Australia

  Project Contacts:
1460 Cadia Rd, Cadia
South Orange
New South Wales, Australia
2800
Phone  ...  Subscription required
Fax02 6366 4333
EmailEmail
WebsiteWeb
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  • Overview
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  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Costs & Financials
  • Personnel
  • Filings & News

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Overview

StageConstruction
Mine TypeUnderground
Commodities
  • Gold
  • Copper
  • Silver
  • Molybdenum
Mining Method
  • Panel caving
Production Start...
Mine Life16 years (as of Jan 1, 2022)
PC1-2 is the next panel cave for execution at Cadia after PC2-3 and its development is expected to recover approximately 20% of Cadia’s published Ore Reserves.

Newcrest released the Cadia PC1-2 Feasibility Study on 11 November 2022. PC1-2 Feasibility Study approved to execution with development underway.

Main works development has commenced, with development forecast to be completed in January 2027. Production is forecast to commence in FY26.


Owners

Source: p. 31
CompanyInterestOwnershipInvestor's Info
Newmont Corp. 100 % Indirect
Cadia is 100% owned by Newcrest through its wholly owned Subsidiary, Cadia Holdings Pty Ltd.

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

  • Vein / narrow vein
  • Porphyry
  • Skarn


Summary:

The Cadia East deposit is hosted within the Forest Reef Volcanics and porphyry intrusions. A north-east trending mass of narrow sheet like dykes of monzonitic to dioritic compositions intrude the lower parts of the FRV at Cadia East. These intrusives are largely restricted to the eastern half of the deposit although some narrow dykes and isolated bodies of monzonite have been recognised in the western end. At the upper western end of the deposit immediately underneath the Gibb Fault, isolated narrow intersections have been identified with south dipping mineralised quartz veining. These occurrences are interpreted to be the Cadia Hill Monzonite.

The Cadia East–Far East deposit occupies a mineralised zone 2.5 km in strike length, 600 m in width and over 1,900 m in vertical extent. It is located below and to the east of the Cadia Hill deposit.

Geology
Mineralisation is developed in the FRV, and in a series of subvertical to steeply northdipping monzodioritic to quartz monzonitic dykes, that are termed the Cadia Far East intrusive complex (CFEIC). The syn-mineral nature of at least some of the intrusions is indicated by the presence of mineralised xenoliths within monzonite porphyry dykes that also host porphyry-style veining and alteration.

The Weemalla Formation has been intersected at depth, and consists of finely-bedded siltstone interbedded with basaltic volcanic rocks. Overlying this unit are five lithofacies of the FRV:

* U ........


Mining Methods

  • Panel caving


Summary:

PC1-2 is the next panel cave for execution at Cadia its development is expected to recover approximately 20% of Cadia’s published Ore Reserves. This asset is the next production zone required to supply ore to the mill.

Development of PC1-2 is expected to sustain total Cadia mine production at approximately 35 million tonnes per annum as production from the current operational PC1 and PC2 caves begin to decline from FY24.

PC1-2 is a post-undercut cave utilizing blast pre-conditioning as well as hydrofracking to facilitate caving. Total production from the cave is 280 Mt with an annual production capacity of 24 Mtpa from 146 draw bells and a 115,600 m² footprint. The cave requires approximately 32 km of lateral development. It contains common capital development that enables PC1-3 to take place in future. Main works development has commenced, with development forecast to be completed in January 2027. PC1-2 adjoins PC1 (to the East) and consists of nine extraction drives, the most eastern of which breaks into PC1. PC1-2 is supported by two crushers on the north and south of the footprint. The design throughput for the Materials Handling System (MHS) is 36 Mtpa including support for the deferred PC1-3 to be mined concurrently. Production is forecast to commence in FY26.


Crushing and Grinding


Processing

Flow Sheet: Subscription required

Summary:

- subscription is required.


Projected Production:

CommodityProductUnitsAvg. AnnualLOM
Gold Metal in conc./ doré koz 2313,700
Copper Concentrate kt  ......  Subscription required  ......  Subscription required

Operational Metrics:

Metrics
Annual milling rate  ......  Subscription required
Ore tonnes mined  ......  Subscription required
* According to 2022 study.
Subscription required - Subscription is required.

Reserves at June 30, 2023:
Mineral Resources Cut-Off Criteria: Cadia East Underground- NSR of approx. A$18.00/t milled.

Ore Reserves Cut-Off Criteria: Cadia East Underground - NSR of approx. A$22.70/t milled.

PC1-2 is the next panel cave for execution at Cadia and its development is expected to recover approximately 20% of Cadia’s published Ore Reserves.

CategoryTonnage CommodityGradeContained Metal
Probable 1,200 M dmt Gold 0.42 g/t 16 M oz
Probable 1,200 M dmt Copper 0.29 % 3.4 Mt
Probable 1,200 M dmt Silver 0.69 g/t 26 M oz
Probable 1,200 M dmt Molybdenum 81 ppm 0.096 Mt
Indicated 2,600 M dmt Gold 0.35 g/t 29 M oz
Indicated 2,600 M dmt Copper 0.26 % 6.7 Mt
Indicated 2,600 M dmt Silver 0.65 g/t 54 M oz
Indicated 2,600 M dmt Molybdenum 65 ppm 0.17 Mt
Inferred 500 M dmt Gold 0.24 g/t 3.8 M oz
Inferred 500 M dmt Copper 0.17 % 0.85 Mt
Inferred 500 M dmt Silver 0.47 g/t 7.5 M oz
Inferred 500 M dmt Molybdenum 25 ppm 0.012 Mt

Commodity Production Costs:

CommodityAverage
All-in sustaining costs (sold) Gold  ......  Subscription required
Assumed price Copper  ......  Subscription required
Assumed price Gold  ......  Subscription required
* According to 2022 study / presentation.
† Net of By-Product.
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2022 Study Costs and Valuation Metrics :

MetricsUnitsLOM Total
Initial CapEx $M AUD  ......  Subscription required
Sustaining CapEx $M AUD  ......  Subscription required
Total CapEx $M AUD  ......  Subscription required
$M AUD  ......  Subscription required
After-tax IRR, %  ......  Subscription required
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Heavy Mobile Equipment:

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Oct 30, 2023
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Corporate Filings & Presentations:

DocumentYear
Annual Report 2023
Annual Result 2023
Corporate Presentation 2023
Financial Review 2023
Quarterly Report 2023
Year-end Mineral Reserves 2023
Annual Report 2022
Feasibility Study Report 2022
................................... Subscription required 2021
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