Overview
Stage | Production |
Mine Type | Underground |
Commodities |
|
Mining Method |
- Sub-level open stoping (SLOS)
- Paste backfill
|
Production Start | ...  |
Mine Life | 3 years (as of Jan 1, 2022) |
Lady Loretta mine is part of the Mount Isa Zinc Operation. |
Source:
p. 17
Contractors
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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.
Source:
Summary:

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Production:
Commodity | Units | 2022 |
Zinc
|
kt
| ......  |
Lead
|
kt
| ......  |
Silver
|
oz
| ......  |
Operational Metrics:
Metrics | 2022 | 2021 | 2020 | 2019 | 2018 |
Ore tonnes mined
| ......  | ......  | 1.6 Mt | 1.5 Mt | 8 Mt |
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Reserves at December 31, 2022:
Category | Tonnage | Commodity | Grade |
Proven & Probable
|
4.1 Mt
|
Zinc
|
9.98 %
|
Proven & Probable
|
4.1 Mt
|
Lead
|
2.33 %
|
Proven & Probable
|
4.1 Mt
|
Silver
|
46 g/t
|
Measured & Indicated
|
5.8 Mt
|
Zinc
|
11.87 %
|
Measured & Indicated
|
5.8 Mt
|
Lead
|
2.65 %
|
Measured & Indicated
|
5.8 Mt
|
Silver
|
54 g/t
|
Inferred
|
1 Mt
|
Zinc
|
8.63 %
|
Inferred
|
1 Mt
|
Lead
|
2.13 %
|
Inferred
|
1 Mt
|
Silver
|
2.13 g/t
|
HME Type | Model | Quantity | Leased or Contractor | Ref. Date |
Jumbo
|
.......................
|
.......................
|
|
Mar 5, 2019
|
Loader
|
.......................
|
.......................
|
|
Mar 5, 2019
|
Loader
|
.......................
|
.......................
|
|
Jul 30, 2021
|
Loader (FEL)
|
.......................
|
.......................
|
|
Jul 1, 2018
|
Truck (dump)
|
.......................
|
.......................
|
|
Dec 29, 2020
|
Truck (underground)
|
.......................
|
.......................
|
|
Jul 1, 2018
|
Truck (water)
|
.......................
|
.......................
|
|
Dec 29, 2020
|
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Corporate Filings & Presentations:
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