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Australia

Norseman Mine

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Australia

Norseman Mine

Location: 1 km E from Norseman, Western Australia, Australia

Address:

Level 2, 46 Ventnor Ave, West Perth
Perth
Western Australia, Australia
6005

Contacts:

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Categories

Overview

Mine TypeUnderground
StatusActive
Commodities
  • Gold
Mining Method
  • Longhole open stoping
Production Start... Lock
Mine Life... Lock
SnapshotNorseman Mine comprises the OK Underground Mine, the Scotia Mining Centre (Scotia, Green Lantern, Princess Royal open pits and Scotia underground mine) and processing facility.

The Scotia Open Pit was completed on 28 September 2024, while the Green Lantern Open Pit completed on 11 October 2024. The open pit operations team is progressing plans for the Princess Royal open pits. The Princess Royal work will commence during the March 2025 quarter.

Production stoping activities at Scotia underground mine will commence during the December quarter 2025.

New 1 million tonne per annum Norseman processing plant operating above nameplate capacity and readily expandable.

Target to add high-grade underground mines to increase production to +200,000 oz per annum in the medium term. Exploration drilling from surface re-commenced in September 2024 nearly 3 decades.

Owners

SourceSource
CompanyInterestOwnership
Pantoro Ltd. 100 % Indirect
Pantoro Limited has a 100% interest in the Norseman Project.

On 13 February 2023, Pantoro announced an agreed merger with Tulla Resources Plc, the then 50% partner at Norseman. The merger was completed in late June 2023, with Tulla Shareholders receiving Pantoro shares as consideration.

Contractors

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Deposit type

  • Vein / narrow vein

Summary:

The project area lies at the southern extent of the Norseman - Wiluna Greenstone Belt of the Eastern Goldfields Province of the Yilgarn Block, Western Australia. The regional geology of the Norseman area has been subdivided into four formations being the Penneshaw Formation, Noganyer Formation, Woolyeenyer Formation and the Mt Kirk Formation.

The oldest unit is the Penneshaw Formation which has been dated at 2938±10 Ma (U-Pb zircon, (Hill et al., 1992). The western part of this unit is dominated by amphibolite with minor sediment and felsic rocks, whereas the eastern part comprises intercalated amphibolite and highly deformed felsic rocks.

The overlying Noganyer Formation consists of sediment iron formation (jaspilite), siltstone and sandstone, and minor carbonaceous shale.

Overlying the Noganyer Formation with a conformable or gently unconformable contact is the Woolyeenyer Formation. The Woolyeenyer Formation is dominated by mafic volcanic rocks with minor conformable ultramafic units and sediment bands. These rocks are intruded by mafic dykes with a dominant northeast to northwest trend that are interpreted to be syn-volcanic. The Woolyeenyer Formation is regarded as unconformably overlain by sedimentary and felsicvolcanic to volcaniclastic rocks of the Mt Kirk Formation that have been intruded by thick, differentiated mafic sills. The contact between these units is marked by the regionally extensive Abbottshall Chert comprising silicified banded and fine-grained sediment.

Intrusive rocks in the Norseman region include the Buldania granite, which intrudes the Penneshaw Formation; the Pioneer Granite and similar poorly exposed domal granites that intrude the sequence along the western margin of the greenstone belt; felsic porphyry to granitoid dykes intrude all units and predate mineralisation, and Proterozoic mafic dykes that occupy a Yilgarn-wide set of linear brittle fractures.

All the Norseman reefs are typical Archean lode systems and the orebodies are almost completely structurally controlled. They all share common features which indicates their genesis:

1.Most of the high grade ore zones occur where veins intersect ‘gabbro’ intrusions, and specific oriented contacts are particularly favourable. This is most likely a result of competency contrasts which allow preferential propagation of cracks and other openings within the coarser grained rocks, and the amount of veining is controlled by the orientation of the contact relative to stress directions.

2. Zones where NNE- and west-dipping felsic, dacitic porphyries are intersected by the reefs tend to be zones of intense structural complexity and gold grades are even more variable than usual. In some reefs these can be zones of high grades, and in others, low grades. This reflects the geometry relative to the local direction of maximum compression, and therefore whether the structures are tight or open.

3. Most reefs have only very narrow (a few metres at most) alteration selvages. In some cases, these selvages host high gold grades but in all cases the grade drops off very quickly away from the quartz vein. The northern deposits usually have wider alteration haloes caused by more reaction of ore fluids with host rocks (Archer and Turner, 1998)

Reserves

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Mining Methods

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Comminution

Crushers and Mills

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Processing

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Production

The processing plant had completed commissioning in October 2022 and the Norseman operation moved into the production phase from November 2022.
CommodityUnits20242023
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All production numbers are expressed as metal in doré. ^ Guidance / Forecast.

Operational metrics

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Production Costs

Commodity production costs have not been reported.

Financials

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Heavy Mobile Equipment

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Personnel

Mine Management

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Aerial view:

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