Australia

Rosebery Mine

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Overview

Mine TypeUnderground
StatusActive
Commodities
  • Zinc
  • Lead
  • Copper
  • Gold
  • Silver
Mining Method
  • Longhole open stoping
  • Longitudinal retreat
  • Transverse stoping
Backfill type ... Lock
Production Start... Lock
SnapshotRosebery mine is one of Tasmania’s largest and oldest continuously operating, underground mines producing zinc, copper and lead concentrates, as well as gold doré.

Mine life extension remains a key priority for Rosebery. The Rosebery mine is embarking on an accelerated exploration program in a bid to uncover valuable underground resources. The team are also investigating a sustainable tailings storage solution to support future operations.

Fuelled by more than $20 million committed in 2023 by the business, the accelerated exploration program uses state-of-the-art technology to explore for potential mineralisation both near mine and in greenfield locations. Encouraging results to date underpin the program’s feasibility.

Owners

SourceSource
CompanyInterestOwnership
MMG Ltd. 100 % Indirect
Rosebery Mine is wholly owned by MMG Limited.

Contractors

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Deposit type

  • VMS

Summary:

The Rosebery volcanic-hosted massive sulphide (VHMS) deposit is hosted within the world-class Mt Read Volcanics. This Cambrian volcanic belt is an assemblage of lavas, volcaniclastics and sediments deposited in the Dundas Trough between the Proterozoic Rocky Cape Group and the Tyennan Block.

Mineralisation occurs as stacked stratabound massive to semi-massive base metal sulphide lenses. The host lithology lies between the Rosebery Thrust Fault and the Mt Black Thrust Fault which all dip approximately 45° east. Ore mineralogy consists predominantly of sphalerite, galena, chalcopyrite with electrum and minor tetrahedrite.

The orebody has experienced numerous events of folding, shearing and thrusting particularly in the late Cambrian and early Devonian. Lenses in the southern portions of the deposit have experienced metasomatism and replacement by a deep Devonian granitoid resulting in variation of the mineralogy, structure and alteration in these lenses.

Dimensions
The Rosebery Mineral Resource extends from -300mE to 1750mE, -800mN to 3325mN, 1650mRL to 3500mRL (Rosebery Mine Grid coordinates) and is currently open to the north, south and at depth.

Individual lenses vary in size from a few hundred metres up to 1,000m along strike and/or down-dip, with a total strike length of mineralisation reaching approximately 4,000m.

The mineralised lenses range from a minimum of 0.2-0.3m, maximum of 12-36m with an average true thickness of 3-6m.

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

CommodityProductUnits2024202320222021202020192018201720162015
Zinc Metal in concentrate t  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe83,46375,72174,80381,44792,104
Zinc Equivalent Metal in concentrate t  ....  Subscribe  ....  Subscribe
Zinc Concentrate kt  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe154140135145168
Lead Metal in concentrate t  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe24,54928,74426,61126,00521,312
Lead Concentrate kt  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe4047434234
Copper Metal in concentrate t  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe1,5101,4651,3211,9482,937
Gold Metal in doré oz  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe10,56712,96812,45112,17813,341
Gold Metal in concentrate oz  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe
Silver Metal in doré oz  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe6,0517,2436,5106,7796,991
Silver Metal in concentrate oz  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe
Copper Concentrate kt  ....  Subscribe  ....  Subscribe8.98.57.21115
^ Guidance / Forecast.

Operational metrics

Metrics202320222021202020192018201720162015
Ore tonnes mined  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe1,032,508 t1,017,089 t990,813 t931,573 t897,516 t
Tonnes milled  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe1,030,016 t1,028,234 t968,573 t939,125 t898,573 t
Waste  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe359 kt318 kt297 kt378 t
Plant annual capacity  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe1 Mt

Production Costs

CommodityUnits20242023202220212020201920182017
C1 cash costs Zinc USD  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe 0.2 / lb **   -0.04 / lb **   0.07 / lb **  
^ Guidance / Forecast.
** Net of By-Product.

Financials

Units202320222021202020192018
Revenue M USD  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe 272.8   328.7  
EBIT M USD  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe 55.2   97.8  
EBITDA M USD  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe 125.9   171.6  

Heavy Mobile Equipment

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Personnel

Mine Management

Job TitleNamePhoneProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required May 15, 2024
....................... Subscription required ....................... Subscription required ........... Subscription required Subscription required May 15, 2024
....................... Subscription required ....................... Subscription required Subscription required May 15, 2024
....................... Subscription required ....................... Subscription required Subscription required May 15, 2024
....................... Subscription required ....................... Subscription required Subscription required May 15, 2024
....................... Subscription required ....................... Subscription required Subscription required Jun 5, 2024

EmployeesContractorsTotal WorkforceYear
...... Subscription required ...... Subscription required ...... Subscription required 2023
...... Subscription required ...... Subscription required ...... Subscription required 2023
...... 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 2018
...... Subscription required ...... Subscription required ...... Subscription required 2017
...... Subscription required ...... Subscription required ...... Subscription required 2015

Aerial view:

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