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Australia

Mt Magnet Operation

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Overview

Mine TypeOpen Pit & Underground
StatusActive
Commodities
  • Gold
Mining Method
  • Truck & Shovel / Loader
  • Sub-level stoping
  • Longhole open stoping
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Production Start... Lock
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SnapshotThe Mt Magnet production centre includes the multi pit / underground projects of the Mt Magnet Operation along with high-grade underground ore hauled from the Vivien and Penny Gold Mines. The Cue Gold Project, acquired by Ramelius in 2023, will be integrated into the Mt Magnet operations hub in Q1 CY2024.

Underground operations commenced at the high-grade Penny Gold Mine late in the 2022 financial year.

The last load of ore was trucked from Vivien to Mt Magnet in January 2023 with the mine placed into care and maintenance shortly thereafter.
Related AssetsPenny Mine, Vivien Mine

Owners

SourceSource
CompanyInterestOwnership
Ramelius Resources Ltd. 100 % Indirect
The Mt Magnet is owned 100% by Ramelius Resources Ltd. subsidiary Mt Magnet Gold Pty Ltd.

The Penny is owned 100% by Ramelius Resources Ltd. subsidiary Penny Operations Ltd.

Contractors

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Deposit type

  • Vein / narrow vein
  • Banded iron formation hosted

Summary:

The Mt Magnet production centre includes the multi pit / underground projects.

Mt Magnet
Archaean gold mineralisation. Mineralisation is principally hosted within Banded Iron Formations (BIF) where gold is spatially associated with NE trending faults and associated with pyrrhotite or pyrite mineralisation. Additionally, gold is commonly found in late stage felsic intrusives or structurally controlled zones which cross-cut stratigraphy on NE trend. Interpretation for Mt Magnet resources is based on a long-history of exploration, open-pit and underground mining. Numerous geological interpretations, pit fact maps and reports exist & almost all resources (except Eridanus) have been previously mined.

Dimensions
Numerous variations. Examples: Saturn pit cutback 700m long, 350m wide & 190m deep. Main Saturn BIF hosted ore zone strikes length of pit, is 5-30m wide, subvertical and currently drilled to 350m vertical depth. Higher grade zones typically occurring as vertical shoots in BIFs. Minimum width in resource interpretations generally 3-4m, example Golden Stream narrow sub-vertical BIF hosted resource over 270m strike length, drilled to 90m down-dip.

Penny
The Penny deposit lies within the Archaean-aged Youanmi greenstone belt. Host stratigraphy for the deposit is a sequence of steeply dipping mafic and ultramafic rocks with minor felsic intrusives. Gold mineralisation is associated with steeply east dipping, quartz-sulphide veins typically 1m to 4m in width. The lodes are visually distinct and typically display sharp boundaries to the mineralisation. Minor zones of discontinuous mineralisation occur in the hanging wall of the main lodes, although these veinlets and structures are considered immaterial and have been excluded from the resource estimation.

The mineralised lodes are largely hosted within the granodiorite unit or at the granodiorite-amphibolite contact. The lodes appear to slightly cross-cut stratigraphy and transgress into the amphibolite unit toward the north. Although the Penny West and Penny North lodes are spatially separate and offset by approximately 60m in a general northeast direction, a similar stratigraphic setting and transgression occurs for both lodes. Immediate wall rocks are typically mylonitic with some albite and sericite alteration.

The gold mineralisation at Penny is hosted within a persistent, narrow, steeply east dipping (65° to 80°) quartz-sulphide lode containing both disseminated and coarse gold with grades ranging up to hundreds of grams per tonne. The Penny North lode extends over 400m in strike while Penny West extends nearly 300m. Penny North varies in thickness from 1 to 4m. The Penny West vein is slightly thinner, ranging from 1 to 3m in width.

Both quartz veins are variably massive, laminated or brecciated with a highly variable sulphide assemblage of pyrite, pyrrhotite, galena, chalcopyrite and sphalerite. Some sulphide zones are semi-massive and can comprise 50 - 90% sulphide. Visible gold can be seen proximal to galena and sphalerite. Pb anomalism is significant with lode Pb grade up to 1%. Ag grade is also significantly higher than typical Archaean lode gold deposits and can be up to a 1:1 ratio with Au.

Dimensions
Penny lodes are a narrow vein/lode style. Penny North strikes N and dips 55° to E. Average width around 2-3m, ranging from 1m to 6m. Strike and dip extent of Penny North is 400m by 250m. Penny West is similar to Penny North in orientation and extent with an average width ranging from 1-2m. Strike and dip extent of Penny West is 300m by 200m below the open pit.

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

CommodityUnits20242023202220212020201920182017
Gold oz  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe114,840135,59766,073
All production numbers are expressed as metal in doré. ^ Guidance / Forecast.

Operational metrics

Metrics2023202220212020201920182017
Annual milling capacity  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe2 Mt2 Mt1.8 Mt
Waste  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe
Ore tonnes mined  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe2,338 kt1,208 kt
Tonnes milled  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe1,962 kt1,742 kt1,574,617 t

Production Costs

CommodityUnits20242023202220212020201920182017
All-in sustaining costs (sold) Gold AUD  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe 1,149 / oz  
All-in sustaining costs (AISC) Gold AUD 1,300 / oz   1,250 / oz  
C1 cash costs Gold AUD  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe 913 / oz  
^ Guidance / Forecast.

Financials

Units202420232022202120202019
Capital expenditures (planned) M AUD  ....  Subscribe
Sustaining costs M AUD  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe
Capital expenditures M AUD  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe 37.9  
Revenue M AUD  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe 207.2  
Gross profit M AUD  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe 14.5  
Pre-tax Income M AUD  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe 14.5  
After-tax Income M AUD  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe 14.5  
EBIT M AUD  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe 14.5  

Heavy Mobile Equipment

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Personnel

Mine Management

Job TitleNamePhoneProfileRef. Date
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EmployeesContractorsTotal WorkforceYear
...... Subscription required ...... Subscription required ...... Subscription required 2023
...... Subscription required ...... Subscription required ...... Subscription required 2022
...... Subscription required 2021
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Aerial view:

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