Australia

Rosebery Mine

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Categories

Overview

Mine TypeUnderground
Commodities
  • Zinc
  • Lead
  • Copper
  • Gold
  • Silver
Mining Method
  • Longhole open stoping
  • Longitudinal retreat
  • Transverse stoping
  • Cemented rockfill
  • Unconsolidated rockfill
Production Start... Lock
ShapshotRosebery 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

CommodityProductUnits2024202320222021202020192018
Zinc Metal in concentrate t 0000000000000000000000000000000000075,721
Zinc Equivalent Metal in concentrate t 000000000000000000
Zinc Concentrate kt 0000000000000140
Lead Metal in concentrate t 000000000000000000000000028,744
Lead Concentrate kt 000000000047
Copper Metal in concentrate t 000000000000000000001,465
Gold Metal in doré oz 000000000000000000000000012,968
Gold Metal in concentrate oz 00000000000000000000
Silver Metal in doré oz 000000000000000000007,243
Silver Metal in concentrate oz 0000000000000000000000000000
Copper Concentrate kt 0000008.5
^ Guidance / Forecast.

Operational metrics

Metrics202320222021202020192018
Ore tonnes mined 000000000000000000000000000000001,017,089 t
Tonnes milled 000000000000000000000000000000001,028,234 t
Waste 000000000000318 kt
Plant annual capacity 0

Production Costs

CommodityUnits2024202320222021202020192018
C1 cash costs Zinc USD 0000000 0000000 0000000 0000000 0000000 0.2 / lb   -0.04 / lb  
^ Guidance / Forecast.
Net of By-Product.

Financials

Units202320222021202020192018
Revenue M USD  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe 328.7  
EBIT M USD  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe 97.8  
EBITDA M USD  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe 171.6  

Heavy Mobile Equipment

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Personnel

Mine Management

Source Source
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

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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