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Australia
Lady Loretta Mine (Mount Isa Zinc Operation)

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 Location:
114 km NW from Mount Isa, Queensland, Australia
  Address:
Private Mail Bag 6
Mount Isa
Queensland, Australia
4825
Phone  ...  Subscription required
WebsiteWeb
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Fleet
  • Personnel
  • Filings & News
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Overview

StageProduction
Mine TypeUnderground
Commodities
  • Zinc
  • Lead
  • Silver
Mining Method
  • Sub-level open stoping (SLOS)
  • Paste backfill
Production Start...
Mine Life2.5 years (as of Jan 1, 2021)
Lady Loretta mine is part of the Mount Isa Zinc Operation.

Owners

Source: p. 17
CompanyInterestOwnership
Glencore plc. 100 % Indirect

Contractors

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Deposit Type

  • SEDEX

Summary:

Lead-zinc-silver mineralisation occurs in a galena and sphalerite rich massive sulphide lens located in carbonaceous pyritic shales and siltstones. The deposit consists of a tight syncline dislocated by a number of major faults. The deeper and high grade portion of the deposit reaches 500m below the surface.

Mining Methods

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

Summary:

The mining method utilized at Lady Loretta is conventional sub-level open stoping (a slot is opened up using a Redbore 30 raisebore raise drill) with paste used to fill the void upon completion.

Ore is removed by Sandvik 621 loaders, using the Sandvik Automine system and is trucked to the surface Run Of Mine using Epirog MT65 articulated dump trucks.

The Mining Lease, ML5568, is current until January 31st, 2026.

Crushing and Grinding

Processing

Source: Subscription required

Summary:

- subscription is required.

Combined production numbers are reported under Mount Isa Zinc Operation

Operational Metrics:

Metrics2021202020192018
Ore tonnes mined  ......  Subscription required  ......  Subscription required1.5 Mt8 Mt
Subscription required - Subscription is required.

Reserves at December 31, 2021:

CategoryTonnage CommodityGrade
Proven & Probable 4.9 Mt Zinc 10.6 %
Proven & Probable 4.9 Mt Lead 2.9 %
Proven & Probable 4.9 Mt Silver 55 g/t
Measured & Indicated 7.1 Mt Zinc 11.9 %
Measured & Indicated 7.1 Mt Lead 2.9 %
Measured & Indicated 7.1 Mt Silver 57 g/t
Inferred 1.1 Mt Zinc 8 %
Inferred 1.1 Mt Lead 3 %
Inferred 1.1 Mt Silver 33 g/t

Heavy Mobile Equipment:
HME TypeModelQuantityLeased or
Contractor		Ref. Date
Jumbo ....................... Subscription required ....................... Subscription required Leased Mar 5, 2019
Loader ....................... Subscription required ....................... Subscription required Leased Mar 5, 2019
Loader ....................... Subscription required ....................... Subscription required Leased Jul 30, 2021
Loader (FEL) ....................... Subscription required ....................... Subscription required Leased Jul 1, 2018
Truck (dump) ....................... Subscription required ....................... Subscription required Leased Dec 29, 2020
Truck (underground) ....................... Subscription required ....................... Subscription required Leased Jul 1, 2018
Truck (water) ....................... Subscription required ....................... Subscription required Leased Dec 29, 2020
Subscription required - Subscription is required.

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required May 16, 2022
....................... Subscription required ....................... Subscription required Subscription required May 6, 2022
....................... Subscription required ....................... Subscription required Subscription required May 6, 2022
....................... Subscription required ....................... Subscription required Subscription required Nov 1, 2022
Subscription required - Subscription is required.

Staff:

ContractorsYear
Subscription required 2020
Subscription required 2019

Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2019
Other 2018
Other 2018
Year-end Mineral Reserves 2018
Year-end Mineral Reserves 2017
Corporate Presentation 2016
Year-end Mineral Reserves 2016
Other 1995
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Subscription required - Subscription is required.

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