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Australia
Havieron Project (Telfer Operation)

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 Location:
262 km E from Nullagine, Western Australia, Australia

  Project Contacts:
Level 1, 1 Centro Ave
Subiaco
Western Australia, Australia
6008
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Overview

StageConstruction
Mine TypeUnderground
Commodities
  • Gold
  • Copper
Mining Method
  • Sub-level open stoping (SLOS)
  • Paste backfill
Mine Life9 years (as of Jan 1, 2021)
Newcrest has received the necessary regulatory approvals to commence key early works activities at the Havieron Project. The early works program includes construction of a box cut, exploration decline and supporting surface infrastructure.

During 2022, Newcrest continues development of the Exploration Decline as well as increasing activity associated with the PFS and FS.


Owners

Source: p. 21
CompanyInterestOwnershipInvestor's Info
Greatland Pty Ltd 30 % Indirect
Newcrest Mining Ltd. (operator) 70 % Indirect
The Havieron Project which is operated by Newcrest under a Joint Venture Agreement with Greatland Gold plc.

Newcrest holds a 70% interest in the Havieron Project.

Contractors

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Deposit Type

  • Breccia pipe / Stockwork
  • Vein / narrow vein
  • Replacement
  • Intrusion related


Summary:

The Havieron Project is located within the north-western exposure of the Palaeo-Proterozoic to Neoproterozoic Paterson Orogen (formerly Paterson Province), 45 km east of Telfer. The Yeneena Supergroup hosts the Havieron prospect and consists of a 9km thick sequence of marine sedimentary rocks and is entirely overlain by approximately 420m of Phanerozoic sediments of the Paterson Formation and Quaternary aeolian sediments.

Gold and copper mineralisation at Havieron consist of breccia, vein and massive sulphide replacement gold and copper mineralisation typical of intrusion-related and skarn styles of mineralisation. Mineralisation is hosted by metasedimentary rocks (meta-sandstones, meta-siltstones and meta carbonate) and intrusive rocks of an undetermined age. The main mineral assemblage contains well developed pyrrhotite-chalcopyrite and pyrite sulphide mineral assemblages as breccia and vein infill, and massive sulphide lenses. The main mineralisation event is associated with amphibole carbonatebiotite-sericite-chlorite wall rock alteration. Drilling has partially defined the extents of mineralisation which are observed over 650m by 350m within an arcuate shaped mineralised zone, and to depths of up to 1400m below surface.

Variable brecciation, alteration and sulphide mineralisation are observed with a footprint with dimensions of 650m x 350m trending in a north west orientation and 1000m in vertical extent below ~420m of cover. The SE Crescent Zone M ........


Mining Methods

  • Sub-level open stoping (SLOS)
  • Paste backfill


Summary:

The Havieron Pre-Feasibility Study defined a SLOS mining method with paste fill and truck ore haulage at a 2Mtpa mining rate.

The Study demonstrates the potential to expand the Project and increase the mining rate to 3Mtpa or more based on the conversion of the current Inferred Mineral Resources and additional potential Mineral Resource growth from immediately below the Crescent Zone.

SLOS is a large-scale open stoping method that is conducted over multiple levels at once. Once the stope has been mined out it is backfilled with paste to maintain the overall stability of the opening and enable mining of adjacent stopes. This method is typically applied to strong orebodies that require minimal support and are surrounded by strong country rock, such as the Havieron deposit. Stopes are mined in a checkerboard fashion with all primary stopes first, followed by the intermediate secondary stopes. The mining sequence is top down overall, divided into a number of different lifts separated by horizontal sill levels which are recovered after the upper and lower level have been mined and filled.

A sub-level spacing of 50m with sill drill levels located 20m below each mining front was selected. Some sub-level spacings are increased to 60m to accommodate the inclusion of ore and minimising additional level development. The design consists of nine semi-independent mining sequences, based on both horizontal and vertical mining fronts. The horizontal fronts ar ........


Crushing and Grinding


Processing

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Summary:

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Projected Production:

CommodityProductUnitsAvg. AnnualLOM
Gold Metal in conc./ doré koz 1601,432
Copper Metal in concentrate kt  ......  Subscription required  ......  Subscription required

Operational Metrics:

Metrics
Ore tonnes mined, LOM  ......  Subscription required
Annual milling rate  ......  Subscription required
Annual ore mining rate  ......  Subscription required
* According to 2021 study.
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Reserves at June 30, 2022:
Mineral Resource Cut-Off Criteria: Variable NSR of A$ 50.00/t - A$100.00/t milled.

Ore Reserve Cut-Off Criteria: NSR of A$130.00/t milled.

CategoryTonnage CommodityGradeContained Metal
Probable 14 Mt Gold 3.7 g/t 1.6 M oz
Probable 14 Mt Copper 0.54 % 0.073 Mt
Indicated 28 Mt Gold 3.2 g/t 2.9 M oz
Indicated 28 Mt Copper 0.51 % 0.14 Mt
Inferred 57 Mt Gold 1.4 g/t 2.6 M oz
Inferred 57 Mt Copper 0.14 % 0.082 Mt

Commodity Production Costs:

CommodityUnitsAverage
All-in sustaining costs (sold) Gold USD  ......  Subscription required&nbs
Assumed price Copper USD  ......  Subscription required&nbs
Assumed price Gold USD  ......  Subscription required&nbs
* According to 2021 study / presentation.
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Operating Costs:

Units2021
Total operating costs ($/t milled) AUD 112 *
* According to 2021 study.

2021 Study Costs and Valuation Metrics :

MetricsUnitsLOM Total
Pre-Production capital costs $M AUD  ......  Subscription required
After-tax Cash Flow (LOM) $M AUD  ......  Subscription required
After-tax NPV @ 4.5% $M AUD  ......  Subscription required
After-tax IRR, %  ......  Subscription required
After-tax payback period, years  ......  Subscription required
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Heavy Mobile Equipment:

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Nov 25, 2022
....................... Subscription required ....................... Subscription required Subscription required Nov 25, 2022
....................... Subscription required ....................... Subscription required Subscription required Nov 25, 2022
....................... Subscription required ....................... Subscription required Subscription required Nov 25, 2022
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Corporate Filings & Presentations:

DocumentYear
Annual Report 2022
Corporate Presentation 2022
................................... Subscription required 2021
................................... Subscription required 2021
Subscription required - Subscription is required.

Subscription required - Subscription is required.

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